High-efficiency control of spin-wave propagation in ultra-thin yttrium iron garnet by the spin-orbit torque

We study experimentally with submicrometer spatial resolution the propagation of spin waves in microscopic waveguides based on the nanometer-thick yttrium iron garnet and Pt layers. We demonstrate that by using the spin-orbit torque, the propagation length of the spin waves in such systems can be in...

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Bibliographic Details
Authors: Evelt, M., Demidov, V. E., Bessonov, V., Demokritov, S.O., Prieto, J. L., Muñoz Sánchez, Manuel, Ben Youssef, J., Naletov, V. V., Loubens, G. de, Klein, Oliver, Collet, Martin, Garcia-Hernandez, Karim, Bortolotti, Paolo, Cros, Vicent, Anane, Abdelmadjid
Format: article
Status:Published version
Publication Date:2016
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/181128
Online Access:http://hdl.handle.net/10261/181128
Access Level:Open access
Description
Summary:We study experimentally with submicrometer spatial resolution the propagation of spin waves in microscopic waveguides based on the nanometer-thick yttrium iron garnet and Pt layers. We demonstrate that by using the spin-orbit torque, the propagation length of the spin waves in such systems can be increased by nearly a factor of 10, which corresponds to the increase in the spin-wave intensity at the output of a 10 μm long transmission line by three orders of magnitude. We also show that, in the regime, where the magnetic damping is completely compensated by the spin-orbit torque, the spin-wave amplification is suppressed by the nonlinear scattering of the coherent spin waves from current-induced excitations.

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