Abstract:
Peculiarities of the magnetization dynamics induced in iron garnet films by laser pulses with a frequency detuning near the absorption edge have been studied experimentally. It has been found that the dependence of the observed signal amplitude on the pumping energy becomes nonmonotonic with an increase in the pumping frequency. At the same time, the pumping energy corresponding to the maximum amplitude of the signal and this maximum signal amplitude decrease. Moreover, the signal amplitude starts to decrease with an increase in the pumping energy at frequencies within the absorption band. The observed phenomena are possibly caused by generation of magnetostatic spin waves and the effect of ultrafast optically induced demagnetization.
Citation:
I. V. Savochkin, M. A. Kozhaev, A. I. Chernov, A. N. Kuz'michev, A. K. Zvezdin, V. I. Belotelov, “Magnetization dynamics in epitaxial films induced by femtosecond optical pulses near the absorption edge”, Fizika Tverdogo Tela, 59:5 (2017), 883–887; Phys. Solid State, 59:5 (2017), 904–908
\Bibitem{SavKozChe17}
\by I.~V.~Savochkin, M.~A.~Kozhaev, A.~I.~Chernov, A.~N.~Kuz'michev, A.~K.~Zvezdin, V.~I.~Belotelov
\paper Magnetization dynamics in epitaxial films induced by femtosecond optical pulses near the absorption edge
\jour Fizika Tverdogo Tela
\yr 2017
\vol 59
\issue 5
\pages 883--887
\mathnet{http://mi.mathnet.ru/ftt9576}
\crossref{https://doi.org/10.21883/FTT.2017.05.44375.401}
\elib{https://elibrary.ru/item.asp?id=29405084}
\transl
\jour Phys. Solid State
\yr 2017
\vol 59
\issue 5
\pages 904--908
\crossref{https://doi.org/10.1134/S1063783417050262}
Linking options:
https://www.mathnet.ru/eng/ftt9576
https://www.mathnet.ru/eng/ftt/v59/i5/p883
This publication is cited in the following 2 articles:
Lucile Soumah, Davide Bossini, Abdelmadjid Anane, Stefano Bonetti, “Optical Frequency Up-Conversion of the Ferromagnetic Resonance in an Ultrathin Garnet Mediated by Magnetoelastic Coupling”, Phys. Rev. Lett., 127:7 (2021)
L. A. Shelukhin, V. V. Pavlov, P. A. Usachev, P. Yu. Shamray, R. V. Pisarev, A. M. Kalashnikova, “Ultrafast laser-induced changes of the magnetic anisotropy in a low-symmetry iron garnet film”, Phys. Rev. B, 97:1 (2018)