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Spin Pumping and the Inverse Spin-Hall Effect via Magnetostatic Surface Spin-Wave Modes in Yttrium-Iron Garnet/Platinum Bilayers

Journal article
Authors Michael Balinsky
Mojtaba Ranjbar
Mohammad Haidar
Philipp Dürrenfeld
Serigy Khartsev
Anderi Slavin
Johan Åkerman
Randy K. Dumas
Published in IEEE Magnetics Letters
Volume 6
Pages 1-4
ISSN 1949-307X
Publication year 2015
Published at Department of Physics (GU)
Pages 1-4
Language en
Keywords Spin electronics, inverse spin-Hall effect, spin pumping, magnetostatic surface spin waves.
Subject categories Magnetism


Spin pumping at a boundary between a yttriumiron garnet (YIG) film and a thin platinum (Pt) layer is studied under conditions in which a magnetostatic surface spin wave (MSSW, or DamonEshbach mode) is excited in YIG by a narrow strip-line antenna. It is shown that the voltage created by the inverse spin-Hall effect (ISHE) in Pt is strongly dependent on the wavevector of the excited MSSW. For YIG film thicknesses of 41 and 0.9m, the maximum ISHE voltage corresponds to the maximum of efficiently excited MSSW wavevectors and does not coincide with the maximum of absorbed microwave power. For a thinner (0.175m) YIG film, the maximum of the ISHE voltage moves closer to the ferromagnetic resonance and almost coincides with the region of the maximum microwave absorption. We show that the effect is related to the change in the thickness profile and the wavenumber spectrum of the excited MSSW taking place when the YIG film thickness is increased.

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