Multiferroic Bi 0.65 La 0.35 Fe 0.5 Sc 0.5 O 3 perovskite: Magnetic and thermodynamic properties

E. L. Fertman, A. V. Fedorchenko*, D. D. Khalyavin, A. N. Salak, A. Baran, V. A. Desnenko, O. V. Kotlyar, E. Čižmár, A. Feher, E. S. Syrkin, A. I. Vaisburd, N. M. Olekhnovich, A. V. Pushkarev, Yu V. Radyush, A. Stanulis, A. Kareiva

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Magnetic and thermodynamic properties of polycrystalline multiferroic Bi 0.65 La 0.35 Fe 0.5 Sc 0.5 O 3 synthesized under high-pressure and high-temperature conditions are reported. Magnetic properties were studied using a SQUID magnetometer technique over the temperature range of 5−300 K in magnetic fields up to H=10 kOe. The field dependent magnetization M(H) was measured in magnetic fields up to 50 kOe at different temperatures up to 230 K after zero-field cooling procedure. A long-range magnetic ordering of the AFM type with a weak FM contribution occurs below the Néel temperature T N ~237 K. Magnetic hysteresis loops taken below T N show a huge coercive field up to H c ~10 kOe. A strong effect of magnetic field on the magnetic properties of the compound has been found. Derivative of the initial magnetization curves demonstrates a temperature-dependent anomaly in fields of H=15−25 kOe. Besides, an anomaly of the temperature dependent zero-field cooled magnetization measured in magnetic fields of 6−7 kOe has been found. Origin of both anomalies is associated with inhomogeneous magnetic state of the compound. The heat capacity has been measured from 2 K up to room temperature and a significant contribution from the magnon excitations at low temperatures has been detected. From the low-temperature heat capacity, an anisotropy gap of the magnon modes of the order 3.7 meV and Debye temperature T D =189 K have been determined.

Original languageEnglish
Pages (from-to)177-181
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume429
Early online date12 Jan 2017
DOIs
Publication statusPublished - 1 May 2017

Bibliographical note

© 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

  • Heat capacity
  • Magnetization
  • Multiferroic perovskites

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    Fertman, E. L., Fedorchenko, A. V., Khalyavin, D. D., Salak, A. N., Baran, A., Desnenko, V. A., Kotlyar, O. V., Čižmár, E., Feher, A., Syrkin, E. S., Vaisburd, A. I., Olekhnovich, N. M., Pushkarev, A. V., Radyush, Y. V., Stanulis, A., & Kareiva, A. (2017). Multiferroic Bi 0.65 La 0.35 Fe 0.5 Sc 0.5 O 3 perovskite: Magnetic and thermodynamic properties. Journal of Magnetism and Magnetic Materials, 429, 177-181. https://doi.org/10.1016/j.jmmm.2017.01.037