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This article is cited in 7 scientific papers (total in 7 papers)
Magnetism
Changes in the magnetic structure of multiferroic BiFe$_{0.80}$Cr$_{0.20}$O$_{3}$ with temperature
М. S. Rusakova, V. S. Pokatilovb, A. S. Sigovb, A. A. Belikc, M. E. Matsneva a Lomonosov Moscow State University
b MIREA — Russian Technological University, Moscow
c National Institute for Materials Science, Tsukuba, Japan
Abstract:
The results of a Mössbauer study of the magnetic structure of multiferroic BiFe$_{0.80}$Cr$_{0.20}$O$_{3}$ in the temperature range of 5–550 K are presented. It is found that a collinear antiferromagnetic structure of the $G$ type is present in BiFe$_{0.80}$Cr$_{0.20}$O$_{3}$ at temperatures below 260 K. Above 260 K, an anharmonic spin wave with a magnetic anisotropy of the easy-axis type with a high value of the anharmonicity parameter m arises. With a further increase in the temperature, the m parameter decreases and tends to zero at $T\sim$ 420 K, at which a harmonic spin wave comes into existence. Above a temperature of about 420 K, the m parameter increases again and the spin wave becomes anharmonic with an easy-plane magnetic anisotropy. At the Néel temperature, $T_N$ = 505 $\pm$ 10 K, the sample undergoes a transition from the magnetically ordered to the paramagnetic state. The change in the type of magnetic anisotropy at T 420 K is explained by competing contributions of different signs to the effective magnetic anisotropy constant and their different temperature dependence for the BiFe$_{0.80}$Cr$_{0.20}$O$_{3}$ multiferroic.
Received: 20.12.2018 Revised: 20.12.2018 Accepted: 27.12.2018
Citation:
М. S. Rusakov, V. S. Pokatilov, A. S. Sigov, A. A. Belik, M. E. Matsnev, “Changes in the magnetic structure of multiferroic BiFe$_{0.80}$Cr$_{0.20}$O$_{3}$ with temperature”, Fizika Tverdogo Tela, 61:6 (2019), 1107–1113; Phys. Solid State, 61:6 (2019), 1030–1036
Linking options:
https://www.mathnet.ru/eng/ftt8788 https://www.mathnet.ru/eng/ftt/v61/i6/p1107
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