Article Dans Une Revue Physical Review B Année : 2025

Strain-induced magnetic moment variations at the picosecond timescale

C. Pfaff
  • Fonction : Auteur
T. Pezeril
V. Cherruault
S. Andrieu
K. Dumesnil
J. Gorchon
T. Hauet

Résumé

The spin-lattice interaction, a widely observed yet poorly understood phenomenon, has been often studied in the context of the coupling between lattice and magnetic anisotropies. It is also noteworthy that a quasistatic lattice compression is predicted to reduce the magnetic moment of pure ferromagnets such as cobalt and nickel. In this study, we utilize femtosecond laser pump/probe experiments to investigate the ability of a transient strain pulse to change the magnetic moment of a nanometric Co/Ni multilayer film at the picosecond timescale. In good agreement with static density functional theory calculations, our results reveal that a tensile strain acts oppositely to a compressive strain in increasing the magnetic moment, highlighting the efficiency of such magnetoelastic coupling at THz frequencies.

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hal-04927509 , version 1 (05-02-2025)

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C. Pfaff, T. Pezeril, R. Arras, L. Calmels, V. Cherruault, et al.. Strain-induced magnetic moment variations at the picosecond timescale. Physical Review B, 2025, 111 (6), pp.064405. ⟨10.1103/PhysRevB.111.064405⟩. ⟨hal-04927509⟩
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