TY  - JOUR
AU  - Vavra, M.
AU  - Zentkova, M.
AU  - Mihalik, M.
AU  - Mihalik, Jr., M.
AU  - Lazurova, J.
AU  - Girman, V.
AU  - Perović, Marija M.
AU  - Kusigerski, Vladan
AU  - Roupcova, P.
AU  - Jagličić, Zvonko
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7162
AB  - We study the effect of nanometric size on the crystal structure, magnetic environment of iron and magnetization in NdFeO3 system of nanoparticles. The average particle size of NdFeO3 nanoparticles increases with annealing at 600 degrees C from about 15 nm to 40 nm, The smallest particles on annealed sample have size approximately 30 nm and typically have character of single crystalline samples. All samples adopt orthorhombic crystal structure, space group Prima with lattice parameters a = 5.5817 angstrom, b = 7.7663 angstrom and c = 5.456 angstrom for as prepared sample. The presence of superparamagnetic particles was indicated by the Mossbauer measurements. The reduction of dimensionality induces a decrease of T-N1 from 691 K to 544 K. The shift of magnetic hysteresis loop in vertical and horizontal direction was observed at low temperatures after cooling in magnetic field. We attribute such behaviour to exchange bias effect and discuss in the frame of core shellmodel.
T2  - Acta Physica Polonica A
T1  - Exchange Bias Effect in NdFeO3 System of Nanoparticles
VL  - 131
IS  - 4
SP  - 869
EP  - 871
DO  - 10.12693/APhysPolA.131.869
ER  - 

@article{
author = "Vavra, M. and Zentkova, M. and Mihalik, M. and Mihalik, Jr., M. and Lazurova, J. and Girman, V. and Perović, Marija M. and Kusigerski, Vladan and Roupcova, P. and Jagličić, Zvonko",
year = "2017",
abstract = "We study the effect of nanometric size on the crystal structure, magnetic environment of iron and magnetization in NdFeO3 system of nanoparticles. The average particle size of NdFeO3 nanoparticles increases with annealing at 600 degrees C from about 15 nm to 40 nm, The smallest particles on annealed sample have size approximately 30 nm and typically have character of single crystalline samples. All samples adopt orthorhombic crystal structure, space group Prima with lattice parameters a = 5.5817 angstrom, b = 7.7663 angstrom and c = 5.456 angstrom for as prepared sample. The presence of superparamagnetic particles was indicated by the Mossbauer measurements. The reduction of dimensionality induces a decrease of T-N1 from 691 K to 544 K. The shift of magnetic hysteresis loop in vertical and horizontal direction was observed at low temperatures after cooling in magnetic field. We attribute such behaviour to exchange bias effect and discuss in the frame of core shellmodel.",
journal = "Acta Physica Polonica A",
title = "Exchange Bias Effect in NdFeO3 System of Nanoparticles",
volume = "131",
number = "4",
pages = "869-871",
doi = "10.12693/APhysPolA.131.869"
}

Vavra, M., Zentkova, M., Mihalik, M., Mihalik, Jr., M., Lazurova, J., Girman, V., Perović, M. M., Kusigerski, V., Roupcova, P.,& Jagličić, Z.. (2017). Exchange Bias Effect in NdFeO3 System of Nanoparticles. in Acta Physica Polonica A, 131(4), 869-871.
https://doi.org/10.12693/APhysPolA.131.869

Vavra M, Zentkova M, Mihalik M, Mihalik JM, Lazurova J, Girman V, Perović MM, Kusigerski V, Roupcova P, Jagličić Z. Exchange Bias Effect in NdFeO3 System of Nanoparticles. in Acta Physica Polonica A. 2017;131(4):869-871.
doi:10.12693/APhysPolA.131.869 .

Vavra, M., Zentkova, M., Mihalik, M., Mihalik, Jr., M., Lazurova, J., Girman, V., Perović, Marija M., Kusigerski, Vladan, Roupcova, P., Jagličić, Zvonko, "Exchange Bias Effect in NdFeO3 System of Nanoparticles" in Acta Physica Polonica A, 131, no. 4 (2017):869-871,
https://doi.org/10.12693/APhysPolA.131.869 . .

TY  - CONF
AU  - Lazurova, J.
AU  - Mihalik, M.
AU  - Mihalik, Jr., M.
AU  - Vavra, M.
AU  - Zentkova, M.
AU  - Briancin, J.
AU  - Perović, Marija M.
AU  - Kusigerski, Vladan
AU  - Schneeweiss, Oldřich B.
AU  - Roupcova, P.
AU  - Kamenev, K. V.
AU  - Misek, M.
AU  - Jagličić, Zvonko
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7067
AB  - The effect of particle reduction to nanoscale size and substitution of Mn3+ ions for Fe3+ ions on the crystal structure, lattice dynamics, Mossbauer spectra and magnetic properties in NdFe(1-x)MnxO(3) compounds have been studied. X-ray powder diffraction and Raman spectroscopy revealed that the Jahn-Teller distortion of lattice dominates for samples with x GT 0.4. The average particle size of NdFeO3 nanoparticles (NAP) increases with annealing at 600 degrees C from about 15 nm to 25 nm. The presence of superparamagnetic particles was indicated by Mossbauer measurements in NdFeO3 NAP system. Sextets in NdFe(1-x)MnxO(3) Mssbauer spectra can be modelled with several local environments of Fe3+ induced by substitution. The reduction of dimensionality and the substitution induce a decrease of the Neel temperature T-Nl from 691 K to 544 K for NAP or to 356 K for x = 0.4, however the temperature of spin reorientation T-SR increases with substitution. The saturated magnetization obtained at 1.9 K increases and ferromagnetic component is removed below T-SR with the substitution.
C3  - Journal of Physics: Conference Series
T1  - Magnetic Properties and Mossbauer spectroscopy of NdFe(1-x)MnxO(3)
VL  - 592
DO  - 10.1088/1742-6596/592/1/012117
ER  - 

@conference{
author = "Lazurova, J. and Mihalik, M. and Mihalik, Jr., M. and Vavra, M. and Zentkova, M. and Briancin, J. and Perović, Marija M. and Kusigerski, Vladan and Schneeweiss, Oldřich B. and Roupcova, P. and Kamenev, K. V. and Misek, M. and Jagličić, Zvonko",
year = "2015",
abstract = "The effect of particle reduction to nanoscale size and substitution of Mn3+ ions for Fe3+ ions on the crystal structure, lattice dynamics, Mossbauer spectra and magnetic properties in NdFe(1-x)MnxO(3) compounds have been studied. X-ray powder diffraction and Raman spectroscopy revealed that the Jahn-Teller distortion of lattice dominates for samples with x GT 0.4. The average particle size of NdFeO3 nanoparticles (NAP) increases with annealing at 600 degrees C from about 15 nm to 25 nm. The presence of superparamagnetic particles was indicated by Mossbauer measurements in NdFeO3 NAP system. Sextets in NdFe(1-x)MnxO(3) Mssbauer spectra can be modelled with several local environments of Fe3+ induced by substitution. The reduction of dimensionality and the substitution induce a decrease of the Neel temperature T-Nl from 691 K to 544 K for NAP or to 356 K for x = 0.4, however the temperature of spin reorientation T-SR increases with substitution. The saturated magnetization obtained at 1.9 K increases and ferromagnetic component is removed below T-SR with the substitution.",
journal = "Journal of Physics: Conference Series",
title = "Magnetic Properties and Mossbauer spectroscopy of NdFe(1-x)MnxO(3)",
volume = "592",
doi = "10.1088/1742-6596/592/1/012117"
}

Lazurova, J., Mihalik, M., Mihalik, Jr., M., Vavra, M., Zentkova, M., Briancin, J., Perović, M. M., Kusigerski, V., Schneeweiss, O. B., Roupcova, P., Kamenev, K. V., Misek, M.,& Jagličić, Z.. (2015). Magnetic Properties and Mossbauer spectroscopy of NdFe(1-x)MnxO(3). in Journal of Physics: Conference Series, 592.
https://doi.org/10.1088/1742-6596/592/1/012117

Lazurova J, Mihalik M, Mihalik JM, Vavra M, Zentkova M, Briancin J, Perović MM, Kusigerski V, Schneeweiss OB, Roupcova P, Kamenev KV, Misek M, Jagličić Z. Magnetic Properties and Mossbauer spectroscopy of NdFe(1-x)MnxO(3). in Journal of Physics: Conference Series. 2015;592.
doi:10.1088/1742-6596/592/1/012117 .

Lazurova, J., Mihalik, M., Mihalik, Jr., M., Vavra, M., Zentkova, M., Briancin, J., Perović, Marija M., Kusigerski, Vladan, Schneeweiss, Oldřich B., Roupcova, P., Kamenev, K. V., Misek, M., Jagličić, Zvonko, "Magnetic Properties and Mossbauer spectroscopy of NdFe(1-x)MnxO(3)" in Journal of Physics: Conference Series, 592 (2015),
https://doi.org/10.1088/1742-6596/592/1/012117 . .