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Direct observation of dynamic modes excited in a magnetic insulator by pure spin current

AuthorsDemidov, V. E.; Evelt, M.; Bessonov, V.; Demokritov, S.O.; Prieto, J. L.; Muñoz Sánchez, Manuel ; Ben Youssef, J.; Naletov, V. V.; Loubens, G. de; Klein, Oliver; Collet, Martin; Bortolotti, Paolo; Cros, Vicent; Anane, Abdelmadjid
Issue Date9-Sep-2016
PublisherNature Publishing Group
CitationScientific Reports 6: 32781 (2016)
AbstractExcitation of magnetization dynamics by pure spin currents has been recently recognized as an enabling mechanism for spintronics and magnonics, which allows implementation of spin-torque devices based on low-damping insulating magnetic materials. Here we report the first spatially-resolved study of the dynamic modes excited by pure spin current in nanometer-thick microscopic insulating Yttrium Iron Garnet disks. We show that these modes exhibit nonlinear self-broadening preventing the formation of the self-localized magnetic bullet, which plays a crucial role in the stabilization of the single-mode magnetization oscillations in all-metallic systems. This peculiarity associated with the efficient nonlinear mode coupling in low-damping materials can be among the main factors governing the interaction of pure spin currents with the dynamic magnetization in high-quality magnetic insulators.
Publisher version (URL)https://doi.org/10.1038/srep32781
Appears in Collections:(IMN-CNM) Artículos
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