Coherent long-range transfer of angular momentum between magnon Kittel modes by phonons

We report ferromagnetic resonance in the normal configuration of an electrically insulating magnetic bilayer consisting of two yttrium iron garnet (YIG) films epitaxially grown on both sides of a 0.5-mm-thick nonmagnetic gadolinium gallium garnet (GGG) slab. An interference pattern is observed and i...

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Published inarXiv.org
Main Authors An, Kyongmo, Litvinenko, Artem N, Kohno, Ryuhei, Fuad, Aufa A, Naletov, Vladimir V, Vila, Laurent, Ebels, Ursula, Grégoire de Loubens, Hurdequint, Hervé, Beaulieu, Nathan, Jamal Ben Youssef, Vukadinovic, Nicolas, Bauer, Gerrit E W, Slavin, Andrei N, Tiberkevich, Vasil S, Klein, Olivier
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 12.03.2020
Subjects
Angular momentum
Coupling
Dielectric waveguides
Epitaxial growth
Ferromagnetic resonance
Ferromagnetism
Gadolinium
Gadolinium-gallium garnet
Microwave absorption
Physics - Materials Science
Physics - Mesoscale and Nanoscale Physics
Sound waves
Yttrium
Yttrium-iron garnet
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Summary:We report ferromagnetic resonance in the normal configuration of an electrically insulating magnetic bilayer consisting of two yttrium iron garnet (YIG) films epitaxially grown on both sides of a 0.5-mm-thick nonmagnetic gadolinium gallium garnet (GGG) slab. An interference pattern is observed and it is explained as the strong coupling of the magnetization dynamics of the two YIG layers either in phase or out of phase by the standing transverse sound waves, which are excited through a magnetoelastic interaction. This coherent mediation of angular momentum by circularly polarized phonons through a nonmagnetic material over macroscopic distances can be useful for future information technologies.
ISSN:2331-8422
DOI:10.48550/arxiv.1905.12523