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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2023, Volume 118, Issue 2, Pages 104–109
DOI: https://doi.org/10.31857/S1234567823140070 (Mi jetpl6993) 		 
CONDENSED MATTER

Photoinduced nonthermal reduction of the coercive field in FePt and FePt$_{0.84}$Rh$_{0.16}$ epitaxial thin films in the $L1_0$ phase

A. V. Petrova, S. I. Nikitina, L. R. Tagirovab, A. S. Kamzinc, R. V. Yusupova

a Kazan Federal University, Kazan, 420008 Russia
b Zavoisky Physical–Technical Institute, FRC Kazan Scientific Center, Russian Academy of Sciences, Kazan, 420029 Russia
c Ioffe Institute, St. Petersburg, 194021 Russia
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DOI: https://doi.org/10.31857/S1234567823140070
Abstract: The time-resolved magneto-optical Kerr effect in epitaxial thin films of the FePt compound and the FePt$_{0.84}$Rh$_{0.16}$ solid solution with the perpendicular magnetic anisotropy on MgO (001) substrates has been studied. The evolution of hysteresis loops at short (100 fs–1 ns) and long (1–20 ms) time scales after the excitation by a femtosecond light pulse has been studied. Long-lived nonthermal reduction of the coercive field has been detected. The coercive field is recovered in several milliseconds. It has been proposed to explain the observed phenomenon by the excitation of high-$Q$-factor acoustic resonances in the substrate/film system and to the strong magnetoelastic interaction in FePt and FePt$_{0.84}$Rh$_{0.16}$ films.
Funding agency Grant number
Ministry of Science and Higher Education of the Russian Federation 122011800133-2
This work was supported the Ministry of Science and Higher Education of the Russian Federation (Strategic Academic Leadership Program Priority-2030 for the Kazan Federal University). L.R. Tagirov acknowledges the support of the Ministry of Science and Higher Education of the Russian Federation (state assignment no. 122011800133-2 for the FRC Kazan Scientific Center, Russian Academy of Sciences).
Received: 02.05.2023
Revised: 14.06.2023
Accepted: 14.06.2023
English version:
Journal of Experimental and Theoretical Physics Letters, 2023, Volume 118, Issue 2, Pages 117–122
DOI: https://doi.org/10.1134/S0021364023601914
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: A. V. Petrov, S. I. Nikitin, L. R. Tagirov, A. S. Kamzin, R. V. Yusupov, “Photoinduced nonthermal reduction of the coercive field in FePt and FePt$_{0.84}$Rh$_{0.16}$ epitaxial thin films in the $L1_0$ phase”, Pis'ma v Zh. Èksper. Teoret. Fiz., 118:2 (2023), 104–109; JETP Letters, 118:2 (2023), 117–122
Citation in format AMSBIB
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\by A.~V.~Petrov, S.~I.~Nikitin, L.~R.~Tagirov, A.~S.~Kamzin, R.~V.~Yusupov
\paper Photoinduced nonthermal reduction of the coercive field in FePt and FePt$_{0.84}$Rh$_{0.16}$ epitaxial thin films in the $L1_0$ phase
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2023
\vol 118
\issue 2
\pages 104--109
\mathnet{http://mi.mathnet.ru/jetpl6993}
\crossref{https://doi.org/10.31857/S1234567823140070}
\edn{https://elibrary.ru/gzkdef}
\transl
\jour JETP Letters
\yr 2023
\vol 118
\issue 2
\pages 117--122
\crossref{https://doi.org/10.1134/S0021364023601914}
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