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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2025, Volume 121, Issue 3, Pages 202–208
DOI: https://doi.org/10.31857/S0370274X25020051 (Mi jetpl7432) 		 
This article is cited in 1 scientific paper (total in 1 paper)

CONDENSED MATTER

Spectroscopic study of the multiferroic LiCoPO$_4$: magnetostructural phase transition

S. A. Klimina, A. D. Molchanovaa, V. A. Chernyshevb, V. N. Denisovac, N. N. Novikovaa, V. A. Yakovleva

a Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow, 108840 Russia
b Ural Federal University named after the first President of Russia Boris Yeltsin, Yekaterinburg, 620062 Russia
c Technological Institute of Superhard and New Carbon Materials, National Research Center Kurchatov Institute, Troitsk, Moscow, 108840 Russia
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DOI: https://doi.org/10.31857/S0370274X25020051
Abstract: The low-frequency excitations of the LiCoPO$_4$ multiferroic have been studied. New lines of various origins have been observed in the transmission spectra below the temperature of antiferromagnetic ordering, which is accompanied by the appearance of spontaneous electric polarization. Most of these lines correspond to magnetic excitations. The appearance of new phonons in the antiferromagnetic state has been detected for the first time, which makes it possible to classify the phase transition as a magnetostructural phase transition. Information on the frequencies of infrared-active $B_{1u}$ and $B_{2u}$ modes of LiCoPO$_4$ has been obtained for the first time. These data are in good agreement with the ab initio calculations.
Funding agency Grant number
Ministry of Science and Higher Education of the Russian Federation FFUU-2024-0003
FFUU-2024-0004
FEUZ-2023-0017
This work was supported by the Ministry of Science and Higher Education of the Russian Federation state assignments FFUU-2024-0003 for Institute of Spectroscopy, Russian Academy of Sciences. ab initio calculations were performed within state assignment no. FEUZ-2023-0017 for the Ural State University named after the first President of Russia Boris Yeltsin. A.D. Molchanova acknowledges the support of the Ministry of Science and Higher Education of the Russian Federation (state assignment no. FFUU-2024-0004 for Institute of Spectroscopy, Russian Academy of Sciences, low-temperature measurements).
Received: 11.11.2024
Revised: 28.11.2024
Accepted: 09.12.2024
English version:
Journal of Experimental and Theoretical Physics Letters, 2025, Volume 121, Issue 3, Pages 182–188
DOI: https://doi.org/10.1134/S0021364024604603
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: S. A. Klimin, A. D. Molchanova, V. A. Chernyshev, V. N. Denisov, N. N. Novikova, V. A. Yakovlev, “Spectroscopic study of the multiferroic LiCoPO$_4$: magnetostructural phase transition”, Pis'ma v Zh. Èksper. Teoret. Fiz., 121:3 (2025), 202–208; JETP Letters, 121:3 (2025), 182–188
Citation in format AMSBIB
\Bibitem{KliMolChe25}
\by S.~A.~Klimin, A.~D.~Molchanova, V.~A.~Chernyshev, V.~N.~Denisov, N.~N.~Novikova, V.~A.~Yakovlev
\paper Spectroscopic study of the multiferroic LiCoPO$_4$: magnetostructural phase transition
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2025
\vol 121
\issue 3
\pages 202--208
\mathnet{http://mi.mathnet.ru/jetpl7432}
\edn{https://elibrary.ru/FSZCZE}
\transl
\jour JETP Letters
\yr 2025
\vol 121
\issue 3
\pages 182--188
\crossref{https://doi.org/10.1134/S0021364024604603}
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