Multiferroic Bi0.65La0.35Fe0.5Sc0.5O3 perovskite: Magnetic and thermodynamic properties
authors Fertman, EL; Fedorchenko, AV; Khalyavin, DD; Salak, AN; Baran, A; Desnenko, VA; Kotlyar, OV; Cizmar, E; Feher, A; Syrkin, ES; Vaisburd, AI; Olekhnovich, NM; Pushkarev, AV; Radyush, YV; Stanulis, A; Kareiva, A
nationality International
author keywords Multiferroic perovskites; Magnetization; Heat capacity
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 Neel temperature T-N 237 K. Magnetic hysteresis loops taken below TN show a huge coercive field up to H-c 0 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=89 K have been determined.
issn 0304-8853
isbn 1873-4766
year published 2017
volume 429
beginning page 177
ending page 181
digital object identifier (doi) 10.1016/j.jmmm.2017.01.037
web of science category Materials Science, Multidisciplinary; Physics, Condensed Matter
subject category Materials Science; Physics
unique article identifier WOS:000397201200027
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