TY  - JOUR
AU  - Tadić, Marin
AU  - Citakovic, Nada
AU  - Panjan, Matjaž
AU  - Stanojević, Boban
AU  - Marković, Dragana
AU  - Jovanović, Đorđe
AU  - Spasojević, Vojislav
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5168
AB  - We found novel and superior magnetic properties of the hematite (alpha-Fe2O3) that originate from an internal microstructure of particles and strong inter-particle interactions between nanocrystal sub-units. The hematite particles were synthesized by thermal decomposition of iron (III) nitrate without any template or surfactant. The purity, size, crystallinity, morphology, microstructure and magnetic features of the as-prepared particles were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), Raman spectroscopy (RS) and SQUID magnetometry. An XRD study reveals a pure phase of alpha-Fe2O3 whereas TEM shows alpha-Fe2O3 spheres with a diameter of about 150 nm. RS also shows high quality and purity of the sample. Moreover, TEM and HRTEM images show a pomegranate-like superstructure and evidence that the spherical particles are composed of individual well-crystallized nanoparticle sub-units (self-assembled nanoparticles) with a size of about 20 nm. Magnetic measurements display hysteretic behavior at the room temperature with remanent magnetization M-r = 0.731 emu/g, saturation magnetization M-S = 6.83 emu/g and coercivity H-C = 4350 Oe, as well as the Morin transition at T-M = 261 K. These results and comparison with those in the literature reveal that the sample has extremely high coercivity. The magnetic properties of the sample are discussed in relation to morphology, internal microstructure, surface effects and exchange and dipole-dipole interactions. (C) 2012 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Synthesis, morphology and microstructure of pomegranate-like hematite (alpha-Fe2O3) superstructure with high coercivity
VL  - 543
SP  - 118
EP  - 124
DO  - 10.1016/j.jallcom.2012.07.047
ER  - 

@article{
author = "Tadić, Marin and Citakovic, Nada and Panjan, Matjaž and Stanojević, Boban and Marković, Dragana and Jovanović, Đorđe and Spasojević, Vojislav",
year = "2012",
abstract = "We found novel and superior magnetic properties of the hematite (alpha-Fe2O3) that originate from an internal microstructure of particles and strong inter-particle interactions between nanocrystal sub-units. The hematite particles were synthesized by thermal decomposition of iron (III) nitrate without any template or surfactant. The purity, size, crystallinity, morphology, microstructure and magnetic features of the as-prepared particles were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), Raman spectroscopy (RS) and SQUID magnetometry. An XRD study reveals a pure phase of alpha-Fe2O3 whereas TEM shows alpha-Fe2O3 spheres with a diameter of about 150 nm. RS also shows high quality and purity of the sample. Moreover, TEM and HRTEM images show a pomegranate-like superstructure and evidence that the spherical particles are composed of individual well-crystallized nanoparticle sub-units (self-assembled nanoparticles) with a size of about 20 nm. Magnetic measurements display hysteretic behavior at the room temperature with remanent magnetization M-r = 0.731 emu/g, saturation magnetization M-S = 6.83 emu/g and coercivity H-C = 4350 Oe, as well as the Morin transition at T-M = 261 K. These results and comparison with those in the literature reveal that the sample has extremely high coercivity. The magnetic properties of the sample are discussed in relation to morphology, internal microstructure, surface effects and exchange and dipole-dipole interactions. (C) 2012 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Synthesis, morphology and microstructure of pomegranate-like hematite (alpha-Fe2O3) superstructure with high coercivity",
volume = "543",
pages = "118-124",
doi = "10.1016/j.jallcom.2012.07.047"
}

Tadić, M., Citakovic, N., Panjan, M., Stanojević, B., Marković, D., Jovanović, Đ.,& Spasojević, V.. (2012). Synthesis, morphology and microstructure of pomegranate-like hematite (alpha-Fe2O3) superstructure with high coercivity. in Journal of Alloys and Compounds, 543, 118-124.
https://doi.org/10.1016/j.jallcom.2012.07.047

Tadić M, Citakovic N, Panjan M, Stanojević B, Marković D, Jovanović Đ, Spasojević V. Synthesis, morphology and microstructure of pomegranate-like hematite (alpha-Fe2O3) superstructure with high coercivity. in Journal of Alloys and Compounds. 2012;543:118-124.
doi:10.1016/j.jallcom.2012.07.047 .

Tadić, Marin, Citakovic, Nada, Panjan, Matjaž, Stanojević, Boban, Marković, Dragana, Jovanović, Đorđe, Spasojević, Vojislav, "Synthesis, morphology and microstructure of pomegranate-like hematite (alpha-Fe2O3) superstructure with high coercivity" in Journal of Alloys and Compounds, 543 (2012):118-124,
https://doi.org/10.1016/j.jallcom.2012.07.047 . .

TY  - JOUR
AU  - Tadić, Marin
AU  - Citakovic, Nada
AU  - Panjan, Matjaž
AU  - Stojanović, Zoran S.
AU  - Marković, Dragana
AU  - Spasojević, Vojislav
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4375
AB  - We report on hydrothermal synthesis, plate-like morphology, microstructure and magnetic properties of hematite (alpha-Fe2O3) plate-like particles. The sample is obtained immediately after the hydrothermal process without using any template and without further heat treatment. The so-obtained sample is characterized by X-ray powder diffraction (XRPD), energy-dispersive X-ray spectroscopy (EDX), field-emission scanning electron microscope (FE-SEM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), and superconducting quantum interference device ( SQUID) magnetometer. XRPD confirms the formation of a single-phase hematite sample whereas EDX reveals that iron and oxygen are the only components of the sample. SEM, FE-SEM, TEM and HRTEM show that the sample is composed of plate-like particles. The width of the particles is similar to 500nm whereas thickness is similar to 100 nm ( aspect ratio 5: 1). The HRTEM images exhibit well defined lattice fringes of alpha-Fe2O3 particles that confirm their high crystallinity. Moreover, the HRTEM analysis indicates the plate-like particles preferring crystal growth along [0 1 2] direction. Magnetic measurements display significant hysteretic behavior at room temperature with coercivity H-C = 1140 Oe, remanent magnetization M-r = 0.125 emu/g and saturation magnetization M-S = 2.15 emu/g as well as the Morin transition at TM similar to 250 K. The magnetic properties are discussed with respect to morphology and microstructure of the particles. The results and comparison with urchin-like, rods, spherical, hexagonal, star-like, dendrites, platelets, irregular, nanoplatelets, nanocolumns and nanospheres hematites reveal that the plate-like particles possess good magnetic properties. One may conjecture that the shape anisotropy plays an important role in the magnetic properties of the sample. (C) 2011 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Synthesis, morphology, microstructure and magnetic properties of hematite submicron particles
VL  - 509
IS  - 28
SP  - 7639
EP  - 7644
DO  - 10.1016/j.jallcom.2011.04.117
ER  - 

@article{
author = "Tadić, Marin and Citakovic, Nada and Panjan, Matjaž and Stojanović, Zoran S. and Marković, Dragana and Spasojević, Vojislav",
year = "2011",
abstract = "We report on hydrothermal synthesis, plate-like morphology, microstructure and magnetic properties of hematite (alpha-Fe2O3) plate-like particles. The sample is obtained immediately after the hydrothermal process without using any template and without further heat treatment. The so-obtained sample is characterized by X-ray powder diffraction (XRPD), energy-dispersive X-ray spectroscopy (EDX), field-emission scanning electron microscope (FE-SEM), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), and superconducting quantum interference device ( SQUID) magnetometer. XRPD confirms the formation of a single-phase hematite sample whereas EDX reveals that iron and oxygen are the only components of the sample. SEM, FE-SEM, TEM and HRTEM show that the sample is composed of plate-like particles. The width of the particles is similar to 500nm whereas thickness is similar to 100 nm ( aspect ratio 5: 1). The HRTEM images exhibit well defined lattice fringes of alpha-Fe2O3 particles that confirm their high crystallinity. Moreover, the HRTEM analysis indicates the plate-like particles preferring crystal growth along [0 1 2] direction. Magnetic measurements display significant hysteretic behavior at room temperature with coercivity H-C = 1140 Oe, remanent magnetization M-r = 0.125 emu/g and saturation magnetization M-S = 2.15 emu/g as well as the Morin transition at TM similar to 250 K. The magnetic properties are discussed with respect to morphology and microstructure of the particles. The results and comparison with urchin-like, rods, spherical, hexagonal, star-like, dendrites, platelets, irregular, nanoplatelets, nanocolumns and nanospheres hematites reveal that the plate-like particles possess good magnetic properties. One may conjecture that the shape anisotropy plays an important role in the magnetic properties of the sample. (C) 2011 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Synthesis, morphology, microstructure and magnetic properties of hematite submicron particles",
volume = "509",
number = "28",
pages = "7639-7644",
doi = "10.1016/j.jallcom.2011.04.117"
}

Tadić, M., Citakovic, N., Panjan, M., Stojanović, Z. S., Marković, D.,& Spasojević, V.. (2011). Synthesis, morphology, microstructure and magnetic properties of hematite submicron particles. in Journal of Alloys and Compounds, 509(28), 7639-7644.
https://doi.org/10.1016/j.jallcom.2011.04.117

Tadić M, Citakovic N, Panjan M, Stojanović ZS, Marković D, Spasojević V. Synthesis, morphology, microstructure and magnetic properties of hematite submicron particles. in Journal of Alloys and Compounds. 2011;509(28):7639-7644.
doi:10.1016/j.jallcom.2011.04.117 .

Tadić, Marin, Citakovic, Nada, Panjan, Matjaž, Stojanović, Zoran S., Marković, Dragana, Spasojević, Vojislav, "Synthesis, morphology, microstructure and magnetic properties of hematite submicron particles" in Journal of Alloys and Compounds, 509, no. 28 (2011):7639-7644,
https://doi.org/10.1016/j.jallcom.2011.04.117 . .

TY  - JOUR
AU  - Tadić, Marin
AU  - Kusigerski, Vladan
AU  - Marković, Dragana
AU  - Citakovic, Nada
AU  - Remskar, Maja
AU  - Spasojević, Vojislav
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3824
AB  - We report on morphological, structural and magnetic properties of alpha-Fe2O3 nanoparticles in an amorphous alumina matrix synthesized by aqueous combustion method. The sample was characterized by X-ray powder diffraction (XRPD), high-resolution electron microscopy (HREM) and SQUID magnetometry. XRPD study reveals the phase purity of alpha-Fe2O3 whereas HREM images show an unusual spongy structure and well-crystallized nanoparticles with a size of about 25 nm. Magnetic measurements show a high irreversibility temperature T-irr approximate to 350 K, Morin transition at T-M approximate to 210 K, increase of the magnetization below T approximate to 45 K and hysteretic behavior below T-M at 5 K and 200 K. (C) 2009 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Morphological, structural and magnetic properties of alpha-Fe2O3 nanoparticles in an amorphous alumina matrix obtained by aqueous combustion method
VL  - 486
IS  - 1-2
SP  - 839
EP  - 843
DO  - 10.1016/j.jallcom.2009.07.077
ER  - 

@article{
author = "Tadić, Marin and Kusigerski, Vladan and Marković, Dragana and Citakovic, Nada and Remskar, Maja and Spasojević, Vojislav",
year = "2009",
abstract = "We report on morphological, structural and magnetic properties of alpha-Fe2O3 nanoparticles in an amorphous alumina matrix synthesized by aqueous combustion method. The sample was characterized by X-ray powder diffraction (XRPD), high-resolution electron microscopy (HREM) and SQUID magnetometry. XRPD study reveals the phase purity of alpha-Fe2O3 whereas HREM images show an unusual spongy structure and well-crystallized nanoparticles with a size of about 25 nm. Magnetic measurements show a high irreversibility temperature T-irr approximate to 350 K, Morin transition at T-M approximate to 210 K, increase of the magnetization below T approximate to 45 K and hysteretic behavior below T-M at 5 K and 200 K. (C) 2009 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Morphological, structural and magnetic properties of alpha-Fe2O3 nanoparticles in an amorphous alumina matrix obtained by aqueous combustion method",
volume = "486",
number = "1-2",
pages = "839-843",
doi = "10.1016/j.jallcom.2009.07.077"
}

Tadić, M., Kusigerski, V., Marković, D., Citakovic, N., Remskar, M.,& Spasojević, V.. (2009). Morphological, structural and magnetic properties of alpha-Fe2O3 nanoparticles in an amorphous alumina matrix obtained by aqueous combustion method. in Journal of Alloys and Compounds, 486(1-2), 839-843.
https://doi.org/10.1016/j.jallcom.2009.07.077

Tadić M, Kusigerski V, Marković D, Citakovic N, Remskar M, Spasojević V. Morphological, structural and magnetic properties of alpha-Fe2O3 nanoparticles in an amorphous alumina matrix obtained by aqueous combustion method. in Journal of Alloys and Compounds. 2009;486(1-2):839-843.
doi:10.1016/j.jallcom.2009.07.077 .

Tadić, Marin, Kusigerski, Vladan, Marković, Dragana, Citakovic, Nada, Remskar, Maja, Spasojević, Vojislav, "Morphological, structural and magnetic properties of alpha-Fe2O3 nanoparticles in an amorphous alumina matrix obtained by aqueous combustion method" in Journal of Alloys and Compounds, 486, no. 1-2 (2009):839-843,
https://doi.org/10.1016/j.jallcom.2009.07.077 . .