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Fizika Tverdogo Tela, 2021, Volume 63, Issue 2, Pages 237–241
DOI: https://doi.org/10.21883/FTT.2021.02.50469.188
(Mi ftt8181)
 

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.
Funding agency Grant number
Ministry of Education and Science of the Russian Federation 01201463332
This work was performed within the framework of the state task of the Zavoisky Physical–Technical Institute, Kazan Scientific Center, Russian Academy of Sciences and theme no. 01201463332 of the Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences.
Received: 07.09.2020
Revised: 07.09.2020
Accepted: 08.09.2020
English version:
Physics of the Solid State, 2021, Volume 63, Issue 2, Pages 261–265
DOI: https://doi.org/10.1134/S1063783421020189
Bibliographic databases:
Document Type: Article
Language: Russian
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
Citation in format AMSBIB
\Bibitem{MigKur21}
\by S.~A.~Migachev, M.~I.~Kurkin
\paper Specifics of determination of orientation magnetic phase transition characteristics in hematite using magnetoacoustic methods
\jour Fizika Tverdogo Tela
\yr 2021
\vol 63
\issue 2
\pages 237--241
\mathnet{http://mi.mathnet.ru/ftt8181}
\crossref{https://doi.org/10.21883/FTT.2021.02.50469.188}
\elib{https://elibrary.ru/item.asp?id=44846496}
\transl
\jour Phys. Solid State
\yr 2021
\vol 63
\issue 2
\pages 261--265
\crossref{https://doi.org/10.1134/S1063783421020189}
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