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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2020, Volume 112, Issue 2, Pages 88–92
DOI: https://doi.org/10.31857/S1234567820140049 (Mi jetpl6215) 		 
This article is cited in 5 scientific papers (total in 5 papers)

CONDENSED MATTER

Effect of slow ion relaxation at ferromagnetic resonance in a CoFeB–LiNbO metal-insulator nanocomposite

A. B. Drovosekova, N. M. Kreinesa, A. S. Barkalovaab, S. N. Nikolaevc, A. V. Sitnikovd, V. V. Rylkovec

a Kapitza Institute for Physical Problems, Russian Academy of Sciences, Moscow, 119334 Russia
b National Research University, Higher School of Economics, Moscow, 101000 Russia
c National Research Center Kurchatov Institute, Moscow, 123182 Russia
d Voronezh State Technical University, Voronezh, 394026 Russia
e Institute of Radio Engineering and Electronics (Fryazino Branch), Russian Academy of Sciences, Fryazino, Moscow region, 141190 Russia
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DOI: https://doi.org/10.31857/S1234567820140049
Abstract: Metal-insulator nanocomposite (CoFeB)$_x$(LiNbO$_3$)$_{100-x}$ films are studied by the ferromagnetic resonance method in the temperature range of 4–320 K. In the low-temperature region, the maximum of the ferromagnetic resonance linewidth and a negative dynamic shift of the absorption peak, typical of the mechanism of slow ion relaxation on magnetic impurities, are found. The observed magnetic relaxation features can be caused by paramagnetic Co and Fe ions, which are dispersed in the dielectric LiNbO$_3$ matrix and are exchange-coupled to ferromagnetic CoFeB granules. Experimental temperature dependences of the ferromagnetic resonance linewidth and shift are in good agreement with theoretical curves obtained within the proposed approach.
Funding agency Grant number
Russian Academy of Sciences - Federal Agency for Scientific Organizations
Russian Foundation for Basic Research 18-07-00772_à
18-07-00756_à
19-07-00471
Russian Science Foundation 16-19-10233
This work was supported in part by the Russian Foundation for Basic Research (project nos. 18-07-00772, 18-07-00756, and 19-07-00471), by the Presidium of the Russian Academy of Sciences (Basic Research Program “Actual Problems of Low Temperature Physics”), and by the Russian Science Foundation (project no. 16-19-10233, synthesis of nanocomposite films and their structural characterization).
Received: 28.05.2020
Revised: 03.06.2020
Accepted: 04.06.2020
English version:
Journal of Experimental and Theoretical Physics Letters, 2020, Volume 112, Issue 2, Pages 84–87
DOI: https://doi.org/10.1134/S0021364020140088
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: A. B. Drovosekov, N. M. Kreines, A. S. Barkalova, S. N. Nikolaev, A. V. Sitnikov, V. V. Rylkov, “Effect of slow ion relaxation at ferromagnetic resonance in a CoFeB–LiNbO metal-insulator nanocomposite”, Pis'ma v Zh. Èksper. Teoret. Fiz., 112:2 (2020), 88–92; JETP Letters, 112:2 (2020), 84–87
Citation in format AMSBIB
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\paper Effect of slow ion relaxation at ferromagnetic resonance in a CoFeB–LiNbO metal-insulator nanocomposite
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