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Spin Pumping and the Inverse Spin-Hall Effect via Magnetostatic Surface Spin-Wave Modes in Yttrium-Iron Garnet/Platinum Bilayers
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2015 (English)In: IEEE Magnetics Letters, ISSN 1949-307X, E-ISSN 1949-3088, Vol. 6, no 3000604Article in journal (Refereed) Published
Abstract [en]

Spin pumping at a boundary between a yttrium-iron garnet (YIG) film and a thin platinum (Pt) layer is studied under conditions in which a magnetostatic surface spin wave (MSSW, or Damon-Eshbach 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 0.9 mu m, 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 (0.175 mu m) 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.

Place, publisher, year, edition, pages
2015. Vol. 6, no 3000604
Keyword [en]
Spin electronics, inverse spin-Hall effect, spin pumping, magnetostatic surface spin waves
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URN: urn:nbn:se:kth:diva-175518DOI: 10.1109/LMAG.2015.2471276ISI: 000361770700001OAI: diva2:862246
Swedish Research CouncilSwedish Foundation for Strategic Research Knut and Alice Wallenberg Foundation

QC 20151021

Available from: 2015-10-21 Created: 2015-10-16 Last updated: 2015-10-21Bibliographically approved

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Khartsev, SergiyÅkerman, Johan
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Integrated Devices and CircuitsMaterial Physics, MF
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