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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Article dans une revue
Applied Physics Letters, American Institute of Physics, 2016, 108 (17), 〈10.1063/1.4948252〉
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https://hal-cea.archives-ouvertes.fr/cea-01484755
Contributeur : Dominique Girard <>
Soumis le : mardi 7 mars 2017 - 16:33:46
Dernière modification le : mardi 3 juillet 2018 - 11:49:38

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M. Evelt, V. Demidov, V. Bessonov, O. 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), 〈10.1063/1.4948252〉. 〈cea-01484755〉

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