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Magnetism
Specifics of determination of orientation magnetic phase transition characteristics in hematite using magnetoacoustic methods
S. A. Migacheva, M. I. Kurkinb a Zavoisky Physical Technical Institute, Kazan Scientific Center of the Russian Academy of Sciences, Kazan, Russia
b Institute of Metal Physics, Ural Division of the Russian Academy of Sciences, Yekaterinburg, Russia
Abstract:
The measurement results of the velocity of magnetoelastic waves in hematite corresponding to their quasi-phonon branch have been presented. The dependences of this velocity $(V)$ on the magnetic field $(H)$ at constant uniaxial pressure $P,(V_P(H))$, and on pressure $P$ at constant $H,(V_H(P))$, have been studied. In accordance with the existing theory of magnetoacoustic phenomena, dependences $V_P(H)$ and $V_H(P)$ should exhibit minima at the orientation phase transition points. These minima were found, but their coordinates on the plane $(P,H)$ did not coincide. The reasons of non-coincidence and requirements to the measurement accuracy are discussed, which yield possibilities of its use to determine characteristics of these transitions.
Keywords:
antiferromagnet, magnetoelasticity, orientation phase transitions, bulk acoustic wave.
Received: 07.09.2020 Revised: 07.09.2020 Accepted: 08.09.2020
Citation:
S. A. Migachev, M. I. Kurkin, “Specifics of determination of orientation magnetic phase transition characteristics in hematite using magnetoacoustic methods”, Fizika Tverdogo Tela, 63:2 (2021), 237–241; Phys. Solid State, 63:2 (2021), 261–265
Linking options:
https://www.mathnet.ru/eng/ftt8181 https://www.mathnet.ru/eng/ftt/v63/i2/p237
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Abstract page: | 51 | Full-text PDF : | 15 |
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