TY  - JOUR
AU  - Tadić, Marin
AU  - Panjan, Matjaž
AU  - Lalatone, Yoann
AU  - Milošević, Irena
AU  - Vučetić Tadić, Biljana
AU  - Lazović, Jelena
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10477
AB  - We investigate synthesis, phase evolution, hollow and porous structure and magnetic properties of quasi-amorphous intermediate phase (QUAIPH) and hematite (α-Fe2O3) nanostructure synthesized by annealing of akaganeite (β-FeOOH) nanorods. It is found that the annealing temperature determines the phase composition of the products, the crystal structure/size dictates the magnetic properties whereas the final nanorod morphology is determined by the starting material. Annealing of β-FeOOH at ∼300 °C resulted in the formation of hollow QUAIPH nanorods. The synthesized material shows low-cytotoxicity, superparamagnetism and good transverse relaxivity, which is rarely reported for QUAIPH. The QUAIPH nanorods started to transform to porous hematite nanostructures at ∼350 °C and phase transformation was completed at 600 °C. During the annealing, the crystal structure changed from monoclinic (akaganeite) to quasi-amorphous and rhombohedral (hematite). Unusually, the crystallite size first decreased (akaganeite → QUAIPH) and then increased (QUAIPH → hematite) during annealing whereas the nanorods retained particle shape. The magnetic properties of the samples changed from antiferromagnetic (akaganeite) to superparamagnetic with blocking temperature TB = 84 K (QUAIPH) and finally to weak-ferromagnetic with the Morin transition at TM = 244 K and high coercivity HC = 1652 Oe (hematite). The low-cytotoxicity and MRI relaxivity (r2 = 5.80 mM−1 s−1 (akaganeite), r2 = 4.31 mM−1 s−1 (QUAIPH) and r2 = 5.17 mM−1 s−1 (hematite)) reveal potential for biomedical applications.
T2  - Advanced Powder Technology
T1  - Magnetic properties, phase evolution, hollow structure and biomedical application of hematite (α-Fe2O3) and QUAIPH
VL  - 33
IS  - 12
SP  - 103847
DO  - 10.1016/j.apt.2022.103847
ER  - 

@article{
author = "Tadić, Marin and Panjan, Matjaž and Lalatone, Yoann and Milošević, Irena and Vučetić Tadić, Biljana and Lazović, Jelena",
year = "2022",
abstract = "We investigate synthesis, phase evolution, hollow and porous structure and magnetic properties of quasi-amorphous intermediate phase (QUAIPH) and hematite (α-Fe2O3) nanostructure synthesized by annealing of akaganeite (β-FeOOH) nanorods. It is found that the annealing temperature determines the phase composition of the products, the crystal structure/size dictates the magnetic properties whereas the final nanorod morphology is determined by the starting material. Annealing of β-FeOOH at ∼300 °C resulted in the formation of hollow QUAIPH nanorods. The synthesized material shows low-cytotoxicity, superparamagnetism and good transverse relaxivity, which is rarely reported for QUAIPH. The QUAIPH nanorods started to transform to porous hematite nanostructures at ∼350 °C and phase transformation was completed at 600 °C. During the annealing, the crystal structure changed from monoclinic (akaganeite) to quasi-amorphous and rhombohedral (hematite). Unusually, the crystallite size first decreased (akaganeite → QUAIPH) and then increased (QUAIPH → hematite) during annealing whereas the nanorods retained particle shape. The magnetic properties of the samples changed from antiferromagnetic (akaganeite) to superparamagnetic with blocking temperature TB = 84 K (QUAIPH) and finally to weak-ferromagnetic with the Morin transition at TM = 244 K and high coercivity HC = 1652 Oe (hematite). The low-cytotoxicity and MRI relaxivity (r2 = 5.80 mM−1 s−1 (akaganeite), r2 = 4.31 mM−1 s−1 (QUAIPH) and r2 = 5.17 mM−1 s−1 (hematite)) reveal potential for biomedical applications.",
journal = "Advanced Powder Technology",
title = "Magnetic properties, phase evolution, hollow structure and biomedical application of hematite (α-Fe2O3) and QUAIPH",
volume = "33",
number = "12",
pages = "103847",
doi = "10.1016/j.apt.2022.103847"
}

Tadić, M., Panjan, M., Lalatone, Y., Milošević, I., Vučetić Tadić, B.,& Lazović, J.. (2022). Magnetic properties, phase evolution, hollow structure and biomedical application of hematite (α-Fe2O3) and QUAIPH. in Advanced Powder Technology, 33(12), 103847.
https://doi.org/10.1016/j.apt.2022.103847

Tadić M, Panjan M, Lalatone Y, Milošević I, Vučetić Tadić B, Lazović J. Magnetic properties, phase evolution, hollow structure and biomedical application of hematite (α-Fe2O3) and QUAIPH. in Advanced Powder Technology. 2022;33(12):103847.
doi:10.1016/j.apt.2022.103847 .

Tadić, Marin, Panjan, Matjaž, Lalatone, Yoann, Milošević, Irena, Vučetić Tadić, Biljana, Lazović, Jelena, "Magnetic properties, phase evolution, hollow structure and biomedical application of hematite (α-Fe2O3) and QUAIPH" in Advanced Powder Technology, 33, no. 12 (2022):103847,
https://doi.org/10.1016/j.apt.2022.103847 . .

TY  - JOUR
AU  - Tadić, Marin
AU  - Milošević, Irena
AU  - Kralj, Slavko
AU  - Hanžel, Darko
AU  - Barudžija, Tanja
AU  - Motte, Laurence
AU  - Makovec, Darko
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8824
AB  - A metastable ε-polymorph of iron(III) oxide (ε-Fe2O3) is a very attractive material from the technological, engineering, and scientific points of view. In comparison with other iron oxides, it is characterized by unusual magnetic properties and a giant coercivity of ~20 kOe, which is the largest value among metal oxides. The routine method of ε-Fe2O3 formation is based on the thermal annealing of maghemite (γ-Fe2O3) nanoparticles confined in a silica matrix where the ε-Fe2O3 appears as an intermediate phase between the maghemite and an α-polymorph (α-Fe2O3) hematite (γ→ε→α pathway). In this study, it is demonstrated that the ε→α transformation can be reversed when hematite nanoparticles with an anisotropic hollow morphology are annealed above 600 °C. The observed reversal of the phase stability is explained in terms of an increased nanoparticle surface area and surface energy related to the hollow structure. This study demonstrates the applicability of surface-induced phase transformation to stabilize and control ε-Fe2O3 nanostructures with anisotropic shape and high coercivity ~1600 kA/m that is one of the key properties of functional magnetic materials for information processing and storage. The understanding of ε-Fe2O3 formation mechanism can provide a new viewpoint and guidance for designing metastable polymorphs and applicative properties. © 2020 Acta Materialia Inc.
T2  - Acta Materialia
T1  - Surface-induced reversal of a phase transformation for the synthesis of ε-Fe2O3 nanoparticles with high coercivity
VL  - 188
SP  - 16
EP  - 22
DO  - 10.1016/j.actamat.2020.01.058
ER  - 

@article{
author = "Tadić, Marin and Milošević, Irena and Kralj, Slavko and Hanžel, Darko and Barudžija, Tanja and Motte, Laurence and Makovec, Darko",
year = "2020",
abstract = "A metastable ε-polymorph of iron(III) oxide (ε-Fe2O3) is a very attractive material from the technological, engineering, and scientific points of view. In comparison with other iron oxides, it is characterized by unusual magnetic properties and a giant coercivity of ~20 kOe, which is the largest value among metal oxides. The routine method of ε-Fe2O3 formation is based on the thermal annealing of maghemite (γ-Fe2O3) nanoparticles confined in a silica matrix where the ε-Fe2O3 appears as an intermediate phase between the maghemite and an α-polymorph (α-Fe2O3) hematite (γ→ε→α pathway). In this study, it is demonstrated that the ε→α transformation can be reversed when hematite nanoparticles with an anisotropic hollow morphology are annealed above 600 °C. The observed reversal of the phase stability is explained in terms of an increased nanoparticle surface area and surface energy related to the hollow structure. This study demonstrates the applicability of surface-induced phase transformation to stabilize and control ε-Fe2O3 nanostructures with anisotropic shape and high coercivity ~1600 kA/m that is one of the key properties of functional magnetic materials for information processing and storage. The understanding of ε-Fe2O3 formation mechanism can provide a new viewpoint and guidance for designing metastable polymorphs and applicative properties. © 2020 Acta Materialia Inc.",
journal = "Acta Materialia",
title = "Surface-induced reversal of a phase transformation for the synthesis of ε-Fe2O3 nanoparticles with high coercivity",
volume = "188",
pages = "16-22",
doi = "10.1016/j.actamat.2020.01.058"
}

Tadić, M., Milošević, I., Kralj, S., Hanžel, D., Barudžija, T., Motte, L.,& Makovec, D.. (2020). Surface-induced reversal of a phase transformation for the synthesis of ε-Fe2O3 nanoparticles with high coercivity. in Acta Materialia, 188, 16-22.
https://doi.org/10.1016/j.actamat.2020.01.058

Tadić M, Milošević I, Kralj S, Hanžel D, Barudžija T, Motte L, Makovec D. Surface-induced reversal of a phase transformation for the synthesis of ε-Fe2O3 nanoparticles with high coercivity. in Acta Materialia. 2020;188:16-22.
doi:10.1016/j.actamat.2020.01.058 .

Tadić, Marin, Milošević, Irena, Kralj, Slavko, Hanžel, Darko, Barudžija, Tanja, Motte, Laurence, Makovec, Darko, "Surface-induced reversal of a phase transformation for the synthesis of ε-Fe2O3 nanoparticles with high coercivity" in Acta Materialia, 188 (2020):16-22,
https://doi.org/10.1016/j.actamat.2020.01.058 . .

TY  - JOUR
AU  - Tadić, Marin
AU  - Milošević, Irena
AU  - Kralj, Slavko
AU  - Mitrić, Miodrag
AU  - Makovec, Darko
AU  - Saboungi, Marie-Louise
AU  - Motte, Laurence
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1662
AB  - We present a simple preparation route to obtain a nanoscale meta-stable hard-magnetic epsilon-Fe2O3 phase, using silica coated beta-FeOOH nanorods as a precursor and an annealing process. The synthesized epsilon-Fe2O3 nanoparticles exhibit large coercivity (H-C similar to 20 kOe at 300 K and H-C similar to 1.6 kOe at 400 K), confirming their high potential for practical applications.
T2  - Nanoscale
T1  - Synthesis of metastable hard-magnetic epsilon-Fe2O3 nanoparticles from silica-coated akaganeite nanorods
VL  - 9
IS  - 30
SP  - 10579
EP  - 10584
DO  - 10.1039/c7nr03639f
ER  - 

@article{
author = "Tadić, Marin and Milošević, Irena and Kralj, Slavko and Mitrić, Miodrag and Makovec, Darko and Saboungi, Marie-Louise and Motte, Laurence",
year = "2017",
abstract = "We present a simple preparation route to obtain a nanoscale meta-stable hard-magnetic epsilon-Fe2O3 phase, using silica coated beta-FeOOH nanorods as a precursor and an annealing process. The synthesized epsilon-Fe2O3 nanoparticles exhibit large coercivity (H-C similar to 20 kOe at 300 K and H-C similar to 1.6 kOe at 400 K), confirming their high potential for practical applications.",
journal = "Nanoscale",
title = "Synthesis of metastable hard-magnetic epsilon-Fe2O3 nanoparticles from silica-coated akaganeite nanorods",
volume = "9",
number = "30",
pages = "10579-10584",
doi = "10.1039/c7nr03639f"
}

Tadić, M., Milošević, I., Kralj, S., Mitrić, M., Makovec, D., Saboungi, M.,& Motte, L.. (2017). Synthesis of metastable hard-magnetic epsilon-Fe2O3 nanoparticles from silica-coated akaganeite nanorods. in Nanoscale, 9(30), 10579-10584.
https://doi.org/10.1039/c7nr03639f

Tadić M, Milošević I, Kralj S, Mitrić M, Makovec D, Saboungi M, Motte L. Synthesis of metastable hard-magnetic epsilon-Fe2O3 nanoparticles from silica-coated akaganeite nanorods. in Nanoscale. 2017;9(30):10579-10584.
doi:10.1039/c7nr03639f .

Tadić, Marin, Milošević, Irena, Kralj, Slavko, Mitrić, Miodrag, Makovec, Darko, Saboungi, Marie-Louise, Motte, Laurence, "Synthesis of metastable hard-magnetic epsilon-Fe2O3 nanoparticles from silica-coated akaganeite nanorods" in Nanoscale, 9, no. 30 (2017):10579-10584,
https://doi.org/10.1039/c7nr03639f . .

TY  - JOUR
AU  - Kopanja, Lazar
AU  - Milošević, Irena
AU  - Panjan, Matjaž
AU  - Damnjanović, Vesna
AU  - Tadić, Marin
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/901
AB  - We report the synthesis and magnetic properties of hematite/amorphous silica nanostructures. Raman spectroscopy showed the formation of a hematite phase. A transmission electron microscopy (TEM) revealed spherically shaped hematite nanoparticles, well-dispersed in an amorphous silica matrix. In order to quantitatively describe morphological properties of nanoparticles, we use the circularity of shapes as a measure of how circular a shape is. Diameters of about 5 nm and a narrow size distribution of nanoparticles are observed. The obtained hematite nanoparticles exhibit superparamagnetic properties at room temperature (SPION). The sample does not display the Morin transition. The FC hysteresis loop at 5 K has shown an exchange bias effect. These results have been compared to those previously reported for alpha-Fe2O3/SiO2 nanosystems in the literature. These comparisons reveal that the sol-gel combustion method yields hematite nanoparticles with a higher magnetization and magnetic moment. These data indicate the existence of an additional factor that contributes to magnetization. We suggest that the increased magnetization is due to an increased number of the surface spins caused by the breaking of large numbers of exchange bonds between surface atoms (disordered structure). This leads to an increase in the magnetic moment per a hematite nanoparticle and an exchange bias effect. We have concluded that the combustion-related part of this synthesis method enhances surface effects, i.e. it promotes the breaking of bonds and surface disordered layers, which results in these magnetic properties. Such interesting structural and magnetic properties of hematite might be important in future practical applications and fundamental research. (C) 2015 Elsevier B.V. All rights reserved.
PB  - Elsevier
T2  - Applied Surface Science
T1  - Sol-gel combustion synthesis, particle shape analysis and magnetic properties of hematite (alpha-Fe2O3) nanoparticles embedded in an amorphous silica matrix
VL  - 362
SP  - 380
EP  - 386
DO  - 10.1016/j.apsusc.2015.11.238
ER  - 

@article{
author = "Kopanja, Lazar and Milošević, Irena and Panjan, Matjaž and Damnjanović, Vesna and Tadić, Marin",
year = "2016",
abstract = "We report the synthesis and magnetic properties of hematite/amorphous silica nanostructures. Raman spectroscopy showed the formation of a hematite phase. A transmission electron microscopy (TEM) revealed spherically shaped hematite nanoparticles, well-dispersed in an amorphous silica matrix. In order to quantitatively describe morphological properties of nanoparticles, we use the circularity of shapes as a measure of how circular a shape is. Diameters of about 5 nm and a narrow size distribution of nanoparticles are observed. The obtained hematite nanoparticles exhibit superparamagnetic properties at room temperature (SPION). The sample does not display the Morin transition. The FC hysteresis loop at 5 K has shown an exchange bias effect. These results have been compared to those previously reported for alpha-Fe2O3/SiO2 nanosystems in the literature. These comparisons reveal that the sol-gel combustion method yields hematite nanoparticles with a higher magnetization and magnetic moment. These data indicate the existence of an additional factor that contributes to magnetization. We suggest that the increased magnetization is due to an increased number of the surface spins caused by the breaking of large numbers of exchange bonds between surface atoms (disordered structure). This leads to an increase in the magnetic moment per a hematite nanoparticle and an exchange bias effect. We have concluded that the combustion-related part of this synthesis method enhances surface effects, i.e. it promotes the breaking of bonds and surface disordered layers, which results in these magnetic properties. Such interesting structural and magnetic properties of hematite might be important in future practical applications and fundamental research. (C) 2015 Elsevier B.V. All rights reserved.",
publisher = "Elsevier",
journal = "Applied Surface Science",
title = "Sol-gel combustion synthesis, particle shape analysis and magnetic properties of hematite (alpha-Fe2O3) nanoparticles embedded in an amorphous silica matrix",
volume = "362",
pages = "380-386",
doi = "10.1016/j.apsusc.2015.11.238"
}

Kopanja, L., Milošević, I., Panjan, M., Damnjanović, V.,& Tadić, M.. (2016). Sol-gel combustion synthesis, particle shape analysis and magnetic properties of hematite (alpha-Fe2O3) nanoparticles embedded in an amorphous silica matrix. in Applied Surface Science
Elsevier., 362, 380-386.
https://doi.org/10.1016/j.apsusc.2015.11.238

Kopanja L, Milošević I, Panjan M, Damnjanović V, Tadić M. Sol-gel combustion synthesis, particle shape analysis and magnetic properties of hematite (alpha-Fe2O3) nanoparticles embedded in an amorphous silica matrix. in Applied Surface Science. 2016;362:380-386.
doi:10.1016/j.apsusc.2015.11.238 .

Kopanja, Lazar, Milošević, Irena, Panjan, Matjaž, Damnjanović, Vesna, Tadić, Marin, "Sol-gel combustion synthesis, particle shape analysis and magnetic properties of hematite (alpha-Fe2O3) nanoparticles embedded in an amorphous silica matrix" in Applied Surface Science, 362 (2016):380-386,
https://doi.org/10.1016/j.apsusc.2015.11.238 . .

TY  - JOUR
AU  - Tadić, Marin
AU  - Milošević, Irena
AU  - Kralj, Slavko
AU  - Mbodji, Mamadou
AU  - Motte, Laurence
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/622
AB  - We report on structural and magnetic properties of uniform silica-coated akaganeite nanorods with length of L similar to 80 +/- 15 nm and diameter D similar to 15 +/- 5 nm as well as silica shell thickness of about 5 nm. Unexpected negative difference between field-cooled (FC) and zero-field-cooled (ZFC) magnetization Delta M = M-FC - M-ZFC LT 0, room temperature ferromagnetism, and exchange bias effect have been found. The nanorods are investigated by X-ray powder diffraction (XRPD), transmission electron microscopy (TEM), and vibrating sample magnetometer (VSM) measurements. The magnetic measurements were also performed on bare akaganeite nanorods in order to discriminate the effects of silica coating on the magnetic properties. The measured coercivity and exchange bias effect of bare beta-FeOOH nanorods are much lower compared with same properties of SiO2"beta-FeOOH nanorods, emphasizing the effect of silica coating on the magnetic properties. These results are discussed considering the core shell structure of akaganeite nanorods; i.e., the inner part of the akaganeite nanorod has antiferromagnetic ordering, whereas the nanorod surface exhibits some disorder spin state.
T2  - Journal of Physical Chemistry. C
T1  - Silica-Coated and Bare Akaganeite Nanorods: Structural and Magnetic Properties
VL  - 119
IS  - 24
SP  - 13868
EP  - 13875
DO  - 10.1021/acs.jpcc.5b01547
ER  - 

@article{
author = "Tadić, Marin and Milošević, Irena and Kralj, Slavko and Mbodji, Mamadou and Motte, Laurence",
year = "2015",
abstract = "We report on structural and magnetic properties of uniform silica-coated akaganeite nanorods with length of L similar to 80 +/- 15 nm and diameter D similar to 15 +/- 5 nm as well as silica shell thickness of about 5 nm. Unexpected negative difference between field-cooled (FC) and zero-field-cooled (ZFC) magnetization Delta M = M-FC - M-ZFC LT 0, room temperature ferromagnetism, and exchange bias effect have been found. The nanorods are investigated by X-ray powder diffraction (XRPD), transmission electron microscopy (TEM), and vibrating sample magnetometer (VSM) measurements. The magnetic measurements were also performed on bare akaganeite nanorods in order to discriminate the effects of silica coating on the magnetic properties. The measured coercivity and exchange bias effect of bare beta-FeOOH nanorods are much lower compared with same properties of SiO2"beta-FeOOH nanorods, emphasizing the effect of silica coating on the magnetic properties. These results are discussed considering the core shell structure of akaganeite nanorods; i.e., the inner part of the akaganeite nanorod has antiferromagnetic ordering, whereas the nanorod surface exhibits some disorder spin state.",
journal = "Journal of Physical Chemistry. C",
title = "Silica-Coated and Bare Akaganeite Nanorods: Structural and Magnetic Properties",
volume = "119",
number = "24",
pages = "13868-13875",
doi = "10.1021/acs.jpcc.5b01547"
}

Tadić, M., Milošević, I., Kralj, S., Mbodji, M.,& Motte, L.. (2015). Silica-Coated and Bare Akaganeite Nanorods: Structural and Magnetic Properties. in Journal of Physical Chemistry. C, 119(24), 13868-13875.
https://doi.org/10.1021/acs.jpcc.5b01547

Tadić M, Milošević I, Kralj S, Mbodji M, Motte L. Silica-Coated and Bare Akaganeite Nanorods: Structural and Magnetic Properties. in Journal of Physical Chemistry. C. 2015;119(24):13868-13875.
doi:10.1021/acs.jpcc.5b01547 .

Tadić, Marin, Milošević, Irena, Kralj, Slavko, Mbodji, Mamadou, Motte, Laurence, "Silica-Coated and Bare Akaganeite Nanorods: Structural and Magnetic Properties" in Journal of Physical Chemistry. C, 119, no. 24 (2015):13868-13875,
https://doi.org/10.1021/acs.jpcc.5b01547 . .

TY  - JOUR
AU  - Tadić, Marin
AU  - Milošević, Irena
AU  - Kralj, Slavko
AU  - Saboungi, Marie-Louise
AU  - Motte, Laurence
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/532
AB  - We report ferromagnetic-like properties and exchange bias effect in akaganeite (beta-FeOOH) nanorods. They exhibit a Neel temperature T-N = 259 K and ferromagnetic-like hysteresis behavior both below and above T-N. An exchange bias effect is observed below T-N and represents an interesting behavior for akaganeite nanorods. These results are explained on the basis of a core-shell structure in which the core has bulk akaganeite magnetic properties (i.e., antiferromagnetic ordering) while the shell exhibits a disordered spin state. Thus, the nanorods show ferromagnetic properties and an exchange bias effect at the same time, increasing their potential for use in practical applications. (c) 2015 AIP Publishing LLC.
T2  - Applied Physics Letters
T1  - Ferromagnetic behavior and exchange bias effect in akaganeite nanorods
VL  - 106
IS  - 18
DO  - 10.1063/1.4918930
ER  - 

@article{
author = "Tadić, Marin and Milošević, Irena and Kralj, Slavko and Saboungi, Marie-Louise and Motte, Laurence",
year = "2015",
abstract = "We report ferromagnetic-like properties and exchange bias effect in akaganeite (beta-FeOOH) nanorods. They exhibit a Neel temperature T-N = 259 K and ferromagnetic-like hysteresis behavior both below and above T-N. An exchange bias effect is observed below T-N and represents an interesting behavior for akaganeite nanorods. These results are explained on the basis of a core-shell structure in which the core has bulk akaganeite magnetic properties (i.e., antiferromagnetic ordering) while the shell exhibits a disordered spin state. Thus, the nanorods show ferromagnetic properties and an exchange bias effect at the same time, increasing their potential for use in practical applications. (c) 2015 AIP Publishing LLC.",
journal = "Applied Physics Letters",
title = "Ferromagnetic behavior and exchange bias effect in akaganeite nanorods",
volume = "106",
number = "18",
doi = "10.1063/1.4918930"
}

Tadić, M., Milošević, I., Kralj, S., Saboungi, M.,& Motte, L.. (2015). Ferromagnetic behavior and exchange bias effect in akaganeite nanorods. in Applied Physics Letters, 106(18).
https://doi.org/10.1063/1.4918930

Tadić M, Milošević I, Kralj S, Saboungi M, Motte L. Ferromagnetic behavior and exchange bias effect in akaganeite nanorods. in Applied Physics Letters. 2015;106(18).
doi:10.1063/1.4918930 .

Tadić, Marin, Milošević, Irena, Kralj, Slavko, Saboungi, Marie-Louise, Motte, Laurence, "Ferromagnetic behavior and exchange bias effect in akaganeite nanorods" in Applied Physics Letters, 106, no. 18 (2015),
https://doi.org/10.1063/1.4918930 . .

TY  - JOUR
AU  - Tadić, Marin
AU  - Panjan, Matjaž
AU  - Marković, Dragana
AU  - Stanojević, Boban
AU  - Jovanovic, Djordje
AU  - Milošević, Irena
AU  - Spasojević, Vojislav
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5787
AB  - We report on ferromagnetic-like magnetic properties, at room temperature, of spherical nickel oxide core-shell nanoparticles synthesized by sol-gel combustion method. The sample is characterized by using transmission electron microscopy (TEM), selected electron area diffraction (SAED), energy-dispersive X-ray spectroscopy (EDX), Raman spectroscopy (RS) and superconducting quantum interference device (SQUID) magnetometer. The SAED, EDX and RS show high quality and purity of the sample. The TEM images point to core-shell NiO nanostructure with a well crystallized NiO core and surface disorder shell. The size of the nanoparticles of about 5 nm and thickness of the surface shell below 1 nm are estimated from the TEM and HRTEM measurements. The measurements of the magnetization reveals ferromagnetic-like behavior of the sample at room temperature with remanent magnetization M-r = 0.0087 emu/g and coercive field H-C = 115 Oe. These magnetic properties are quite different than in NiO bulk materials and uncommon for nanosized NiO materials. These results also indicate that the synthesized NiO core-shell nanostructure is suitable for spin-valve applications. (C) 2012 Elsevier B. V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - NiO core-shell nanostructure with ferromagnetic-like behavior at room temperature
VL  - 586
SP  - S322
EP  - S325
DO  - 10.1016/j.jallcom.2012.10.166
ER  - 

@article{
author = "Tadić, Marin and Panjan, Matjaž and Marković, Dragana and Stanojević, Boban and Jovanovic, Djordje and Milošević, Irena and Spasojević, Vojislav",
year = "2014",
abstract = "We report on ferromagnetic-like magnetic properties, at room temperature, of spherical nickel oxide core-shell nanoparticles synthesized by sol-gel combustion method. The sample is characterized by using transmission electron microscopy (TEM), selected electron area diffraction (SAED), energy-dispersive X-ray spectroscopy (EDX), Raman spectroscopy (RS) and superconducting quantum interference device (SQUID) magnetometer. The SAED, EDX and RS show high quality and purity of the sample. The TEM images point to core-shell NiO nanostructure with a well crystallized NiO core and surface disorder shell. The size of the nanoparticles of about 5 nm and thickness of the surface shell below 1 nm are estimated from the TEM and HRTEM measurements. The measurements of the magnetization reveals ferromagnetic-like behavior of the sample at room temperature with remanent magnetization M-r = 0.0087 emu/g and coercive field H-C = 115 Oe. These magnetic properties are quite different than in NiO bulk materials and uncommon for nanosized NiO materials. These results also indicate that the synthesized NiO core-shell nanostructure is suitable for spin-valve applications. (C) 2012 Elsevier B. V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "NiO core-shell nanostructure with ferromagnetic-like behavior at room temperature",
volume = "586",
pages = "S322-S325",
doi = "10.1016/j.jallcom.2012.10.166"
}

Tadić, M., Panjan, M., Marković, D., Stanojević, B., Jovanovic, D., Milošević, I.,& Spasojević, V.. (2014). NiO core-shell nanostructure with ferromagnetic-like behavior at room temperature. in Journal of Alloys and Compounds, 586, S322-S325.
https://doi.org/10.1016/j.jallcom.2012.10.166

Tadić M, Panjan M, Marković D, Stanojević B, Jovanovic D, Milošević I, Spasojević V. NiO core-shell nanostructure with ferromagnetic-like behavior at room temperature. in Journal of Alloys and Compounds. 2014;586:S322-S325.
doi:10.1016/j.jallcom.2012.10.166 .

Tadić, Marin, Panjan, Matjaž, Marković, Dragana, Stanojević, Boban, Jovanovic, Djordje, Milošević, Irena, Spasojević, Vojislav, "NiO core-shell nanostructure with ferromagnetic-like behavior at room temperature" in Journal of Alloys and Compounds, 586 (2014):S322-S325,
https://doi.org/10.1016/j.jallcom.2012.10.166 . .

TY  - JOUR
AU  - Tadić, Marin
AU  - Panjan, Matjaž
AU  - Damnjanović, Vesna
AU  - Milošević, Irena
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/225
AB  - Hematite (alpha-Fe2O3) nanoparticles are successfully synthesized by using the hydrothermal synthesis method. An X-ray powder diffraction (XRPD) of the sample shows formation of the nanocrystalline alpha-Fe2O3 phase. A transmission electron microscopy (TEM) measurements show spherical morphology of the hematite nanoparticles and narrow size distribution. An average hematite nanoparticle size is estimated to be about 8 nm by TEM and XRD. Magnetic properties were measured using a superconducting quantum interference device (SQUID) magnetometry. Investigation of the magnetic properties of hematite nanoparticles showed a divergence between field-cooled (FC) and zero-field-cooled (ZFC) magnetization curves below T-irr =103 K (irreversibility temperature). The ZFC magnetization curve showed maximum at T-B = 52 K (blocking temperature). The sample did not exhibit the Morin transition. The M(H) (magnetization versus magnetic field) dependence at 300 K showed properties of superparamagnetic iron oxide nanoparticles (SPION). The M(H) data were successfully fitted by the Langevin function and magnetic moment,up = 657 tu and diameter d= 8.1 nm were determined. Furthermore, magnetic measurements showed high magnetization at room temperature (M-S =3.98 emu/g), which is desirable for application in spintronics and biomedicine. Core-shell structure of the nanoparticles was used to describe high magnetization of the hematite nanoparticles. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Applied Surface Science
T1  - Magnetic properties of hematite (alpha-Fe2O3) nanoparticles prepared by hydrothermal synthesis method
VL  - 320
SP  - 183
EP  - 187
DO  - 10.1016/j.apsusc.2014.08.103
ER  - 

@article{
author = "Tadić, Marin and Panjan, Matjaž and Damnjanović, Vesna and Milošević, Irena",
year = "2014",
abstract = "Hematite (alpha-Fe2O3) nanoparticles are successfully synthesized by using the hydrothermal synthesis method. An X-ray powder diffraction (XRPD) of the sample shows formation of the nanocrystalline alpha-Fe2O3 phase. A transmission electron microscopy (TEM) measurements show spherical morphology of the hematite nanoparticles and narrow size distribution. An average hematite nanoparticle size is estimated to be about 8 nm by TEM and XRD. Magnetic properties were measured using a superconducting quantum interference device (SQUID) magnetometry. Investigation of the magnetic properties of hematite nanoparticles showed a divergence between field-cooled (FC) and zero-field-cooled (ZFC) magnetization curves below T-irr =103 K (irreversibility temperature). The ZFC magnetization curve showed maximum at T-B = 52 K (blocking temperature). The sample did not exhibit the Morin transition. The M(H) (magnetization versus magnetic field) dependence at 300 K showed properties of superparamagnetic iron oxide nanoparticles (SPION). The M(H) data were successfully fitted by the Langevin function and magnetic moment,up = 657 tu and diameter d= 8.1 nm were determined. Furthermore, magnetic measurements showed high magnetization at room temperature (M-S =3.98 emu/g), which is desirable for application in spintronics and biomedicine. Core-shell structure of the nanoparticles was used to describe high magnetization of the hematite nanoparticles. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Applied Surface Science",
title = "Magnetic properties of hematite (alpha-Fe2O3) nanoparticles prepared by hydrothermal synthesis method",
volume = "320",
pages = "183-187",
doi = "10.1016/j.apsusc.2014.08.103"
}

Tadić, M., Panjan, M., Damnjanović, V.,& Milošević, I.. (2014). Magnetic properties of hematite (alpha-Fe2O3) nanoparticles prepared by hydrothermal synthesis method. in Applied Surface Science, 320, 183-187.
https://doi.org/10.1016/j.apsusc.2014.08.103

Tadić M, Panjan M, Damnjanović V, Milošević I. Magnetic properties of hematite (alpha-Fe2O3) nanoparticles prepared by hydrothermal synthesis method. in Applied Surface Science. 2014;320:183-187.
doi:10.1016/j.apsusc.2014.08.103 .

Tadić, Marin, Panjan, Matjaž, Damnjanović, Vesna, Milošević, Irena, "Magnetic properties of hematite (alpha-Fe2O3) nanoparticles prepared by hydrothermal synthesis method" in Applied Surface Science, 320 (2014):183-187,
https://doi.org/10.1016/j.apsusc.2014.08.103 . .

TY  - JOUR
AU  - Milošević, Irena
AU  - Guillot, Samuel
AU  - Tadić, Marin
AU  - Duttine, Mathieu
AU  - Duguet, Etienne
AU  - Pierzchala, Katarzyna
AU  - Sienkiewicz, Andrzej
AU  - Forro, Laszlo
AU  - Saboungi, Marie-Louise
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5877
AB  - We have investigated drug loading and release from thermosensitive gel emulsions with external triggering by an alternating magnetic field (AMF) for on-demand drug delivery. Superparamagnetic iron oxide nanoparticles dispersed in gel emulsions were used to study the loading and release capabilities, with the stable nitroxide radical 2,2,6,6-tetramethyl-1-piperidinyloxy ( TEMPO) serving as the model drug. AMF activation gave similar results to temperature activation in a water bath at 37 degrees C, showing that the principal effect of the AMF is a temperature increase without burst release. These results suggest that the system could play an important role in the development of advanced drug delivery. (C) 2014 AIP Publishing LLC.
T2  - Applied Physics Letters
T1  - Loading and release of internally self-assembled emulsions embedded in a magnetic hydrogel
VL  - 104
IS  - 4
DO  - 10.1063/1.4862811
ER  - 

@article{
author = "Milošević, Irena and Guillot, Samuel and Tadić, Marin and Duttine, Mathieu and Duguet, Etienne and Pierzchala, Katarzyna and Sienkiewicz, Andrzej and Forro, Laszlo and Saboungi, Marie-Louise",
year = "2014",
abstract = "We have investigated drug loading and release from thermosensitive gel emulsions with external triggering by an alternating magnetic field (AMF) for on-demand drug delivery. Superparamagnetic iron oxide nanoparticles dispersed in gel emulsions were used to study the loading and release capabilities, with the stable nitroxide radical 2,2,6,6-tetramethyl-1-piperidinyloxy ( TEMPO) serving as the model drug. AMF activation gave similar results to temperature activation in a water bath at 37 degrees C, showing that the principal effect of the AMF is a temperature increase without burst release. These results suggest that the system could play an important role in the development of advanced drug delivery. (C) 2014 AIP Publishing LLC.",
journal = "Applied Physics Letters",
title = "Loading and release of internally self-assembled emulsions embedded in a magnetic hydrogel",
volume = "104",
number = "4",
doi = "10.1063/1.4862811"
}

Milošević, I., Guillot, S., Tadić, M., Duttine, M., Duguet, E., Pierzchala, K., Sienkiewicz, A., Forro, L.,& Saboungi, M.. (2014). Loading and release of internally self-assembled emulsions embedded in a magnetic hydrogel. in Applied Physics Letters, 104(4).
https://doi.org/10.1063/1.4862811

Milošević I, Guillot S, Tadić M, Duttine M, Duguet E, Pierzchala K, Sienkiewicz A, Forro L, Saboungi M. Loading and release of internally self-assembled emulsions embedded in a magnetic hydrogel. in Applied Physics Letters. 2014;104(4).
doi:10.1063/1.4862811 .

Milošević, Irena, Guillot, Samuel, Tadić, Marin, Duttine, Mathieu, Duguet, Etienne, Pierzchala, Katarzyna, Sienkiewicz, Andrzej, Forro, Laszlo, Saboungi, Marie-Louise, "Loading and release of internally self-assembled emulsions embedded in a magnetic hydrogel" in Applied Physics Letters, 104, no. 4 (2014),
https://doi.org/10.1063/1.4862811 . .

TY  - JOUR
AU  - Tadić, Marin
AU  - Kusigerski, Vladan
AU  - Marković, Dragana
AU  - Panjan, Matjaž
AU  - Milošević, Irena
AU  - Spasojević, Vojislav
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4784
AB  - We report on magnetic properties of iron oxide nanoparticles in a silica matrix synthesized by the sol-gel method. The sample is characterized by using X-ray powder diffractometer (XRPD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX) and superconducting quantum interference device (SQUID) magnetometer. TEM reveals iron oxide nanoparticles (maghemite/magnetite) of small sizes of about 4 nm, narrow size distribution and no particle agglomeration. The SQUID measurements show low blocking temperature T-B = 6 K and superparamagnetic behavior above 30 K. Obtained saturation magnetization M-S = 61.1 emu/g is very high, among the highest values for iron oxides of particle size below 5 nm. The field-cooled hysteresis measurements do not show displacement of the hysteresis loop thus indicating an absence of exchange bias, whereas AC susceptibility reveals non-interacting nanoparticles. The values of K-eff and K-S (effective and surface anisotropy constants) obtained in this work are smaller than those reported in the literature for systems where shells disorder spin structure (surface effects) is observed. These results point to highly crystalline iron oxide nanoparticles with a low amount of internal defects and small surface disorder shell thickness which is uncommon for nanoparticles of this size. Superparamagnetic iron oxide nanoparticles (SPION) with such properties are convenient for the biomedical applications in targeted diagnostics and drug delivery. (C) 2012 Elsevier B. V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Highly crystalline superparamagnetic iron oxide nanoparticles (SPION) in a silica matrix
VL  - 525
SP  - 28
EP  - 33
DO  - 10.1016/j.jallcom.2012.02.056
ER  - 

@article{
author = "Tadić, Marin and Kusigerski, Vladan and Marković, Dragana and Panjan, Matjaž and Milošević, Irena and Spasojević, Vojislav",
year = "2012",
abstract = "We report on magnetic properties of iron oxide nanoparticles in a silica matrix synthesized by the sol-gel method. The sample is characterized by using X-ray powder diffractometer (XRPD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX) and superconducting quantum interference device (SQUID) magnetometer. TEM reveals iron oxide nanoparticles (maghemite/magnetite) of small sizes of about 4 nm, narrow size distribution and no particle agglomeration. The SQUID measurements show low blocking temperature T-B = 6 K and superparamagnetic behavior above 30 K. Obtained saturation magnetization M-S = 61.1 emu/g is very high, among the highest values for iron oxides of particle size below 5 nm. The field-cooled hysteresis measurements do not show displacement of the hysteresis loop thus indicating an absence of exchange bias, whereas AC susceptibility reveals non-interacting nanoparticles. The values of K-eff and K-S (effective and surface anisotropy constants) obtained in this work are smaller than those reported in the literature for systems where shells disorder spin structure (surface effects) is observed. These results point to highly crystalline iron oxide nanoparticles with a low amount of internal defects and small surface disorder shell thickness which is uncommon for nanoparticles of this size. Superparamagnetic iron oxide nanoparticles (SPION) with such properties are convenient for the biomedical applications in targeted diagnostics and drug delivery. (C) 2012 Elsevier B. V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Highly crystalline superparamagnetic iron oxide nanoparticles (SPION) in a silica matrix",
volume = "525",
pages = "28-33",
doi = "10.1016/j.jallcom.2012.02.056"
}

Tadić, M., Kusigerski, V., Marković, D., Panjan, M., Milošević, I.,& Spasojević, V.. (2012). Highly crystalline superparamagnetic iron oxide nanoparticles (SPION) in a silica matrix. in Journal of Alloys and Compounds, 525, 28-33.
https://doi.org/10.1016/j.jallcom.2012.02.056

Tadić M, Kusigerski V, Marković D, Panjan M, Milošević I, Spasojević V. Highly crystalline superparamagnetic iron oxide nanoparticles (SPION) in a silica matrix. in Journal of Alloys and Compounds. 2012;525:28-33.
doi:10.1016/j.jallcom.2012.02.056 .

Tadić, Marin, Kusigerski, Vladan, Marković, Dragana, Panjan, Matjaž, Milošević, Irena, Spasojević, Vojislav, "Highly crystalline superparamagnetic iron oxide nanoparticles (SPION) in a silica matrix" in Journal of Alloys and Compounds, 525 (2012):28-33,
https://doi.org/10.1016/j.jallcom.2012.02.056 . .

TY  - JOUR
AU  - Tadić, Marin
AU  - Panjan, Matjaž
AU  - Marković, D.
AU  - Milošević, Irena
AU  - Spasojević, Vojislav
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4318
AB  - We have observed unusual magnetic properties of NiO (nickel oxide) nanoparticles embedded in a silica matrix. The sample was synthesized by a method based on the contribution of sol-gel and combustion processes. X-ray powder diffraction (XRPD) of the sample shows the formation of the nanocrystalline NiO phase whereas transmission electron microscope (TEM) reveals spherical-shaped nanoparticles of about 4 nm diameter. Moreover, HRTEM images show lattice fringes of the nanoparticles and defects in the crystal structure. The temperature and field dependence of the magnetization are also measured. The zero-field-cooled (ZFC) measurements show two maximums, one sharp and narrow at low temperatures similar to 6.5K and an other broad one at higher temperature similar to 64 K. The FC magnetization shows a continuous increase upon lowering the temperature. The M(H) measurements reveal that NiO nanoparticles display anomalous hysteretic behaviors at low temperatures (below the low temperature maximum in the ZFC curve, 2K and 5K) showing that the magnetization initial curve lies below the hysteresis loop for a certain field range. Moreover, jump of the magnetization at low temperatures (2K and 5K) are also observed. These features represent novel magnetic properties for nanosized NiO which may be attributed to the surface spins. Moreover, these results indicate that the NiO nanoparticle consists of magnetically disorder shell and antiferromagnetically order core with an uncompensated magnetic moment. (C) 2011 Elsevier B. V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Unusual magnetic properties of NiO nanoparticles embedded in a silica matrix
VL  - 509
IS  - 25
SP  - 7134
EP  - 7138
DO  - 10.1016/j.jallcom.2011.04.032
ER  - 

@article{
author = "Tadić, Marin and Panjan, Matjaž and Marković, D. and Milošević, Irena and Spasojević, Vojislav",
year = "2011",
abstract = "We have observed unusual magnetic properties of NiO (nickel oxide) nanoparticles embedded in a silica matrix. The sample was synthesized by a method based on the contribution of sol-gel and combustion processes. X-ray powder diffraction (XRPD) of the sample shows the formation of the nanocrystalline NiO phase whereas transmission electron microscope (TEM) reveals spherical-shaped nanoparticles of about 4 nm diameter. Moreover, HRTEM images show lattice fringes of the nanoparticles and defects in the crystal structure. The temperature and field dependence of the magnetization are also measured. The zero-field-cooled (ZFC) measurements show two maximums, one sharp and narrow at low temperatures similar to 6.5K and an other broad one at higher temperature similar to 64 K. The FC magnetization shows a continuous increase upon lowering the temperature. The M(H) measurements reveal that NiO nanoparticles display anomalous hysteretic behaviors at low temperatures (below the low temperature maximum in the ZFC curve, 2K and 5K) showing that the magnetization initial curve lies below the hysteresis loop for a certain field range. Moreover, jump of the magnetization at low temperatures (2K and 5K) are also observed. These features represent novel magnetic properties for nanosized NiO which may be attributed to the surface spins. Moreover, these results indicate that the NiO nanoparticle consists of magnetically disorder shell and antiferromagnetically order core with an uncompensated magnetic moment. (C) 2011 Elsevier B. V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Unusual magnetic properties of NiO nanoparticles embedded in a silica matrix",
volume = "509",
number = "25",
pages = "7134-7138",
doi = "10.1016/j.jallcom.2011.04.032"
}

Tadić, M., Panjan, M., Marković, D., Milošević, I.,& Spasojević, V.. (2011). Unusual magnetic properties of NiO nanoparticles embedded in a silica matrix. in Journal of Alloys and Compounds, 509(25), 7134-7138.
https://doi.org/10.1016/j.jallcom.2011.04.032

Tadić M, Panjan M, Marković D, Milošević I, Spasojević V. Unusual magnetic properties of NiO nanoparticles embedded in a silica matrix. in Journal of Alloys and Compounds. 2011;509(25):7134-7138.
doi:10.1016/j.jallcom.2011.04.032 .

Tadić, Marin, Panjan, Matjaž, Marković, D., Milošević, Irena, Spasojević, Vojislav, "Unusual magnetic properties of NiO nanoparticles embedded in a silica matrix" in Journal of Alloys and Compounds, 509, no. 25 (2011):7134-7138,
https://doi.org/10.1016/j.jallcom.2011.04.032 . .

TY  - JOUR
AU  - Tadić, Marin
AU  - Kusigerski, Vladan
AU  - Marković, Dragana
AU  - Milošević, Irena
AU  - Spasojević, Vojislav
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3675
AB  - The alpha-Fe2O3/SiO2 nanocomposite containing 45 wt.% of hematite was prepared by the sol-gel method and characterized by using X-ray diffractometer (XRD), transmission electron microscopy (TEM) and. superconducting quantum interference device (SQUID) magnetometer. TEM microscopy showed spherical particles with average size about 10 nm, whereas XRD diffraction confirmed the formation of the hematite phase. The magnetic measurements showed anomalous behavior of the hysteresis loops including decrease of high field isothermal magnetization and overlap of initial, remagnetization and magnetization curves. This anomalous behavior represents a novel effect for alpha-Fe2O3/SiO2 nanocomposites. We conjecture that a field-induced antiferromagnetic coupling between nanoparticles may produce this effect. (C) 2009 Elsevier B.V. All rights reserved.
T2  - Materials Letters
T1  - Anomalous behaviour of the magnetic hysteresis loop in the alpha-Fe2O3/SiO2 nanocomposite
VL  - 63
IS  - 12
SP  - 1054
EP  - 1056
DO  - 10.1016/j.matlet.2009.02.011
ER  - 

@article{
author = "Tadić, Marin and Kusigerski, Vladan and Marković, Dragana and Milošević, Irena and Spasojević, Vojislav",
year = "2009",
abstract = "The alpha-Fe2O3/SiO2 nanocomposite containing 45 wt.% of hematite was prepared by the sol-gel method and characterized by using X-ray diffractometer (XRD), transmission electron microscopy (TEM) and. superconducting quantum interference device (SQUID) magnetometer. TEM microscopy showed spherical particles with average size about 10 nm, whereas XRD diffraction confirmed the formation of the hematite phase. The magnetic measurements showed anomalous behavior of the hysteresis loops including decrease of high field isothermal magnetization and overlap of initial, remagnetization and magnetization curves. This anomalous behavior represents a novel effect for alpha-Fe2O3/SiO2 nanocomposites. We conjecture that a field-induced antiferromagnetic coupling between nanoparticles may produce this effect. (C) 2009 Elsevier B.V. All rights reserved.",
journal = "Materials Letters",
title = "Anomalous behaviour of the magnetic hysteresis loop in the alpha-Fe2O3/SiO2 nanocomposite",
volume = "63",
number = "12",
pages = "1054-1056",
doi = "10.1016/j.matlet.2009.02.011"
}

Tadić, M., Kusigerski, V., Marković, D., Milošević, I.,& Spasojević, V.. (2009). Anomalous behaviour of the magnetic hysteresis loop in the alpha-Fe2O3/SiO2 nanocomposite. in Materials Letters, 63(12), 1054-1056.
https://doi.org/10.1016/j.matlet.2009.02.011

Tadić M, Kusigerski V, Marković D, Milošević I, Spasojević V. Anomalous behaviour of the magnetic hysteresis loop in the alpha-Fe2O3/SiO2 nanocomposite. in Materials Letters. 2009;63(12):1054-1056.
doi:10.1016/j.matlet.2009.02.011 .

Tadić, Marin, Kusigerski, Vladan, Marković, Dragana, Milošević, Irena, Spasojević, Vojislav, "Anomalous behaviour of the magnetic hysteresis loop in the alpha-Fe2O3/SiO2 nanocomposite" in Materials Letters, 63, no. 12 (2009):1054-1056,
https://doi.org/10.1016/j.matlet.2009.02.011 . .

TY  - JOUR
AU  - Tadić, Marin
AU  - Kusigerski, Vladan
AU  - Marković, Dragana
AU  - Milošević, Irena
AU  - Spasojević, Vojislav
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3549
AB  - The alpha-Fe(2)O(3)/SiO(2) nanocomposite containing 45 wt% of hematite was prepared by the sol-gel method followed by heating in air at 200 degrees C. The so-obtained composite of iron(III) nanoparticles dissolved in glassy silica matrix was investigated by X-ray powder diffraction (XRPD), transmission electron microscopy (TEM), and superconducting quantum interference device (SQUID) magnetometry. XRPD confirms the formation of a single-phase hematite sample, whereas TEM reveals spherical particles in a silica matrix with an average diameter of 10 nm. DC magnetization shows bifurcation of the zero-field-cooled (ZFC) and field-cooled (FC) branches up to the room temperature with a blocking temperature TB 65 K. Isothermal M( H) dependence displays significant hysteretic behaviour below TB, whereas the room temperature data were successfully fitted to a weighted Langevin function. The average particle size obtained from this fit is in agreement with the TEM findings. The small shift of the TB value with the magnetic field strength, narrowing of the hysteresis loop at low applied field, and the frequency dependence of the AC susceptibility data point to the presence of inter-particle interactions. The analysis of the results suggests that the system consists of single-domain nanoparticles with intermediate strength interactions. (c) 2008 Elsevier B.V. All rights reserved.
T2  - Journal of Magnetism and Magnetic Materials
T1  - High concentration of hematite nanoparticles in a silica matrix: Structural and magnetic properties
VL  - 321
IS  - 1
SP  - 12
EP  - 16
DO  - 10.1016/j.jmmm.2008.07.006
ER  - 

@article{
author = "Tadić, Marin and Kusigerski, Vladan and Marković, Dragana and Milošević, Irena and Spasojević, Vojislav",
year = "2009",
abstract = "The alpha-Fe(2)O(3)/SiO(2) nanocomposite containing 45 wt% of hematite was prepared by the sol-gel method followed by heating in air at 200 degrees C. The so-obtained composite of iron(III) nanoparticles dissolved in glassy silica matrix was investigated by X-ray powder diffraction (XRPD), transmission electron microscopy (TEM), and superconducting quantum interference device (SQUID) magnetometry. XRPD confirms the formation of a single-phase hematite sample, whereas TEM reveals spherical particles in a silica matrix with an average diameter of 10 nm. DC magnetization shows bifurcation of the zero-field-cooled (ZFC) and field-cooled (FC) branches up to the room temperature with a blocking temperature TB 65 K. Isothermal M( H) dependence displays significant hysteretic behaviour below TB, whereas the room temperature data were successfully fitted to a weighted Langevin function. The average particle size obtained from this fit is in agreement with the TEM findings. The small shift of the TB value with the magnetic field strength, narrowing of the hysteresis loop at low applied field, and the frequency dependence of the AC susceptibility data point to the presence of inter-particle interactions. The analysis of the results suggests that the system consists of single-domain nanoparticles with intermediate strength interactions. (c) 2008 Elsevier B.V. All rights reserved.",
journal = "Journal of Magnetism and Magnetic Materials",
title = "High concentration of hematite nanoparticles in a silica matrix: Structural and magnetic properties",
volume = "321",
number = "1",
pages = "12-16",
doi = "10.1016/j.jmmm.2008.07.006"
}

Tadić, M., Kusigerski, V., Marković, D., Milošević, I.,& Spasojević, V.. (2009). High concentration of hematite nanoparticles in a silica matrix: Structural and magnetic properties. in Journal of Magnetism and Magnetic Materials, 321(1), 12-16.
https://doi.org/10.1016/j.jmmm.2008.07.006

Tadić M, Kusigerski V, Marković D, Milošević I, Spasojević V. High concentration of hematite nanoparticles in a silica matrix: Structural and magnetic properties. in Journal of Magnetism and Magnetic Materials. 2009;321(1):12-16.
doi:10.1016/j.jmmm.2008.07.006 .

Tadić, Marin, Kusigerski, Vladan, Marković, Dragana, Milošević, Irena, Spasojević, Vojislav, "High concentration of hematite nanoparticles in a silica matrix: Structural and magnetic properties" in Journal of Magnetism and Magnetic Materials, 321, no. 1 (2009):12-16,
https://doi.org/10.1016/j.jmmm.2008.07.006 . .