TY  - JOUR
AU  - Zentková, M.
AU  - Kovalik, M.
AU  - Mihalik, M.
AU  - Csach, K.
AU  - Gamzatov, A.G.
AU  - Aliev, A.M.
AU  - Iľkovič, S.
AU  - Fitta, M.
AU  - Perović, Marija M.
AU  - Mihalik, M.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10129
AB  - Experimental study of magnetocaloric effect (MCE) was performed by direct and indirect methods on La0.70Ag0.25MnO3+δ nanoparticles with rhombohedral LaAlO3 – type crystal structure (R3¯c space group – No. 167, hP30). The content of oxygen was modified by annealing at 800 °C/48h in different atmosphere (air, O2 and Ar). The Curie temperature TC increases from 250 K to 319.5 K and to 322.9 K with the content of oxygen. The adiabatic temperature change ΔT(4T) = 1.52 K, the change of magnetic entropy −ΔSmax(4T) = 3.96 Jkg−1K−1 and the relative cooling power RCT(4T) = 172 J/kg are maximal for sample treated in Ar and decrease with oxygen content. The frequency dependence of ΔT (f) and the shape of maximum in ΔT (T) and −ΔSmax (T) indicate relaxation processes and presence of magnetic inhomogeneities which are present mostly in sample treated in Ar. The samples demonstrate the stability of the MCE up to 1000 cycles of switching on and off the magnetic field without any signs of degradation
T2  - Journal of Magnetism and Magnetic Materials
T1  - Magnetocaloric effect in La0.70Ag0.25MnO3+δ magnetic nanoparticles
VL  - 549
SP  - 169002
DO  - 10.1016/j.jmmm.2021.169002
ER  - 

@article{
author = "Zentková, M. and Kovalik, M. and Mihalik, M. and Csach, K. and Gamzatov, A.G. and Aliev, A.M. and Iľkovič, S. and Fitta, M. and Perović, Marija M. and Mihalik, M.",
year = "2022",
abstract = "Experimental study of magnetocaloric effect (MCE) was performed by direct and indirect methods on La0.70Ag0.25MnO3+δ nanoparticles with rhombohedral LaAlO3 – type crystal structure (R3¯c space group – No. 167, hP30). The content of oxygen was modified by annealing at 800 °C/48h in different atmosphere (air, O2 and Ar). The Curie temperature TC increases from 250 K to 319.5 K and to 322.9 K with the content of oxygen. The adiabatic temperature change ΔT(4T) = 1.52 K, the change of magnetic entropy −ΔSmax(4T) = 3.96 Jkg−1K−1 and the relative cooling power RCT(4T) = 172 J/kg are maximal for sample treated in Ar and decrease with oxygen content. The frequency dependence of ΔT (f) and the shape of maximum in ΔT (T) and −ΔSmax (T) indicate relaxation processes and presence of magnetic inhomogeneities which are present mostly in sample treated in Ar. The samples demonstrate the stability of the MCE up to 1000 cycles of switching on and off the magnetic field without any signs of degradation",
journal = "Journal of Magnetism and Magnetic Materials",
title = "Magnetocaloric effect in La0.70Ag0.25MnO3+δ magnetic nanoparticles",
volume = "549",
pages = "169002",
doi = "10.1016/j.jmmm.2021.169002"
}

Zentková, M., Kovalik, M., Mihalik, M., Csach, K., Gamzatov, A.G., Aliev, A.M., Iľkovič, S., Fitta, M., Perović, M. M.,& Mihalik, M.. (2022). Magnetocaloric effect in La0.70Ag0.25MnO3+δ magnetic nanoparticles. in Journal of Magnetism and Magnetic Materials, 549, 169002.
https://doi.org/10.1016/j.jmmm.2021.169002

Zentková M, Kovalik M, Mihalik M, Csach K, Gamzatov A, Aliev A, Iľkovič S, Fitta M, Perović MM, Mihalik M. Magnetocaloric effect in La0.70Ag0.25MnO3+δ magnetic nanoparticles. in Journal of Magnetism and Magnetic Materials. 2022;549:169002.
doi:10.1016/j.jmmm.2021.169002 .

Zentková, M., Kovalik, M., Mihalik, M., Csach, K., Gamzatov, A.G., Aliev, A.M., Iľkovič, S., Fitta, M., Perović, Marija M., Mihalik, M., "Magnetocaloric effect in La0.70Ag0.25MnO3+δ magnetic nanoparticles" in Journal of Magnetism and Magnetic Materials, 549 (2022):169002,
https://doi.org/10.1016/j.jmmm.2021.169002 . .

TY  - JOUR
AU  - Zentkova, M.
AU  - Lazurova, J.
AU  - Kovač, Janez
AU  - Mihalik, M.
AU  - Mihalik, Jr., M.
AU  - Briancin, J.
AU  - Fitta, M.
AU  - Kusigerski, Vladan
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7034
AB  - In our paper we study effect of Mn for Fe substitution on magnetic properties of NdFex-1MnxO3 compounds for x = 0 and 0.1, which have been grown by the OFZ technique. The Neel temperature decreases from T-N1 = 691 K to T-N1 = 621 K, and the anomaly in AC susceptibility, related to spin reorientation, vanishes with Mn substitution. Low temperature heat capacity measurement for sample with x = 0.1 revealed that substitution of Mn for Fe shifts a Schottky-type anomaly at T-sh to higher temperatures. Another anomaly is generated by doping at T-max = 11 K. The anomaly is smeared out by magnetic field, confirming its magnetic origin.
T2  - Acta Physica Polonica A
T1  - Magnetic Properties of NdFe0.9Mn0.1O3
VL  - 126
IS  - 1
SP  - 306
EP  - 307
DO  - 10.12693/APhysPolA.126.306
ER  - 

@article{
author = "Zentkova, M. and Lazurova, J. and Kovač, Janez and Mihalik, M. and Mihalik, Jr., M. and Briancin, J. and Fitta, M. and Kusigerski, Vladan",
year = "2014",
abstract = "In our paper we study effect of Mn for Fe substitution on magnetic properties of NdFex-1MnxO3 compounds for x = 0 and 0.1, which have been grown by the OFZ technique. The Neel temperature decreases from T-N1 = 691 K to T-N1 = 621 K, and the anomaly in AC susceptibility, related to spin reorientation, vanishes with Mn substitution. Low temperature heat capacity measurement for sample with x = 0.1 revealed that substitution of Mn for Fe shifts a Schottky-type anomaly at T-sh to higher temperatures. Another anomaly is generated by doping at T-max = 11 K. The anomaly is smeared out by magnetic field, confirming its magnetic origin.",
journal = "Acta Physica Polonica A",
title = "Magnetic Properties of NdFe0.9Mn0.1O3",
volume = "126",
number = "1",
pages = "306-307",
doi = "10.12693/APhysPolA.126.306"
}

Zentkova, M., Lazurova, J., Kovač, J., Mihalik, M., Mihalik, Jr., M., Briancin, J., Fitta, M.,& Kusigerski, V.. (2014). Magnetic Properties of NdFe0.9Mn0.1O3. in Acta Physica Polonica A, 126(1), 306-307.
https://doi.org/10.12693/APhysPolA.126.306

Zentkova M, Lazurova J, Kovač J, Mihalik M, Mihalik JM, Briancin J, Fitta M, Kusigerski V. Magnetic Properties of NdFe0.9Mn0.1O3. in Acta Physica Polonica A. 2014;126(1):306-307.
doi:10.12693/APhysPolA.126.306 .

Zentkova, M., Lazurova, J., Kovač, Janez, Mihalik, M., Mihalik, Jr., M., Briancin, J., Fitta, M., Kusigerski, Vladan, "Magnetic Properties of NdFe0.9Mn0.1O3" in Acta Physica Polonica A, 126, no. 1 (2014):306-307,
https://doi.org/10.12693/APhysPolA.126.306 . .