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

• DOI: 10.1038/srep32781
• Publication Date: 2016-09-09T09:23:30Z
• Authors: V. E. Demidov; M. Evelt; V. Bessonov; S. O. Demokritov; J. L. Prieto; M. Muñoz; J. Ben Youssef; V. V. Naletov; G. de Loubens; O. Klein; M. Collet; P. Bortolotti; V. Cros; A. Anane
• Keywords: Magnonics; Magnetization dynamics; Yttrium Iron Garnet; Spin wave; Magnetic damping

Abstract Excitation of magnetization dynamics by pure spin currents has been recently recognized as an enabling mechanism for spintronics and magnonics, which allows implementation spin-torque devices based on low-damping insulating magnetic materials. Here we report the first spatially-resolved study dynamic modes excited current in nanometer-thick microscopic Yttrium Iron Garnet disks. We show that these exhibit nonlinear self-broadening preventing formation self-localized bullet, plays a crucial role stabilization single-mode oscillations all-metallic systems. This peculiarity associated with efficient mode coupling materials can be among main factors governing interaction high-quality insulators.