• Muñoz, M.
• Bortolotti, P.
• Demokritov, S. O.
• Youssef, J. Ben
• Prieto, J. L.
• Bessonov, V.
• Klein, O.
• Naletov, V. V.
• Evelt, M.
• Anane, A.
• Cros, V.
• Demidov, V. E.
• Collet, M.
• Loubens, G. De

Abstract

<jats:title>Abstract</jats:title><jats:p>Excitation 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.</jats:p>

Topics

• iron
• Yttrium
• magnetization