Strain-induced magnetic moment variations at the picosecond timescale
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.
Domaines
Physique [physics]Origine | Fichiers produits par l'(les) auteur(s) |
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