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http://hdl.handle.net/10773/25402
Title: | Multiferroic Bi 0.65 La 0.35 Fe 0.5 Sc 0.5 O 3 perovskite: magnetic and thermodynamic properties |
Author: | 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, Yu. V. Stanulis, A. Kareiva, A. |
Keywords: | Multiferroic perovskites Magnetization Heat capacity |
Issue Date: | 1-May-2017 |
Publisher: | Elsevier |
Abstract: | Magnetic and thermodynamic properties of polycrystalline multiferroic Bi0.65La0.35Fe0.5Sc0.5O3 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 TN ~237 K. Magnetic hysteresis loops taken below TN show a huge coercive field up to Hc ~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 TD=189 K have been determined. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/25402 |
DOI: | 10.1016/j.jmmm.2017.01.037 |
ISSN: | 0304-8853 |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Fertman_JMMM-2017.pdf | 1.18 MB | Adobe PDF | View/Open |
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