Spin-wave modes in permalloy/platinum wires and tuning of the mode damping by spin Hall current

Zheng Duan, Carl T. Boone, Xiao Cheng, Ilya N. Krivorotov, Nathalie Reckers, Sven Stienen, Michael Farle, and Jürgen Lindner
Phys. Rev. B 90, 024427 – Published 28 July 2014

Abstract

We report measurements of spectral properties of spin-wave modes in permalloy/platinum (Py/Pt) bilayer wires magnetized along two principal in-plane axes. We find that the spin torque arising from the spin Hall current in Pt can significantly reduce the spectral linewidth of the bulk and edge spin-wave modes of the wire magnetized perpendicular to its long axis. The linewidth reduction is strongest for the quasiuniform mode and weakest for the edge mode. Our work demonstrates the importance of extrinsic contributions to spin-wave damping for tuning of magnetization dynamics by spin Hall current.

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  • Received 5 June 2014
  • Revised 8 July 2014

DOI:https://doi.org/10.1103/PhysRevB.90.024427

©2014 American Physical Society

Authors & Affiliations

Zheng Duan*, Carl T. Boone, Xiao Cheng, and Ilya N. Krivorotov

  • Department of Physics and Astronomy, University of California, Irvine, CA 92697, USA

Nathalie Reckers, Sven Stienen, and Michael Farle

  • Faculty of Physics and Center for Nanointegration (CeNIDE), Universität Duisburg-Essen, Lotharstr. 1, 47048 Duisburg, Germany

Jürgen Lindner

  • Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden–Rossendorf, Bautzner Landstr. 400, 01328 Dresden, Germany

  • *justin.duan68@gmail.com

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Issue

Vol. 90, Iss. 2 — 1 July 2014

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