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

Abstract : 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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https://hal.archives-ouvertes.fr/hal-02065896
Contributor : Olivier Klein <>
Submitted on : Wednesday, March 13, 2019 - 9:10:09 AM
Last modification on : Thursday, April 4, 2019 - 9:44:03 AM

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M. Evelt, V. Demidov, M. Bessonov, M. Demokritov, J. Prieto, et al.. High-efficiency control of spin-wave propagation in ultra-thin yttrium iron garnet by the spin-orbit torque. Applied Physics Letters, American Institute of Physics, 2016, 108 (17), pp.172406. ⟨10.1063/1.4948252⟩. ⟨hal-02065896⟩

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