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Control of Spin Waves in a Thin Film Ferromagnetic Insulator through Interfacial Spin Scattering

Zihui Wang, Yiyan Sun, Mingzhong Wu, Vasil Tiberkevich, and Andrei Slavin
Phys. Rev. Lett. 107, 146602 – Published 29 September 2011
Physics logo See Synopsis: Electrons Churn Up Spin Waves

Abstract

Control of spin waves in a ferrite thin film via interfacial spin scattering was demonstrated. The experiments used a 4.6μm-thick yttrium iron garnet (YIG) film strip with a 20-nm thick Pt capping layer. A dc current pulse was applied to the Pt layer and produced a spin current across the Pt thickness. As the spin current scatters off the YIG surface, it can either amplify or attenuate spin-wave pulses that travel in the YIG strip, depending on the current or field configuration. The spin scattering also affects the saturation behavior of high-power spin waves.

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  • Received 12 April 2011

DOI:https://doi.org/10.1103/PhysRevLett.107.146602

© 2011 American Physical Society

Synopsis

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Electrons Churn Up Spin Waves

Published 29 September 2011

A new technique amplifies spin waves electronically and does not rely on external microwave sources.

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Authors & Affiliations

Zihui Wang1, Yiyan Sun1, Mingzhong Wu1,*, Vasil Tiberkevich2, and Andrei Slavin2

  • 1Department of Physics, Colorado State University, Fort Collins, Colorado 80523, USA
  • 2Department of Physics, Oakland University, Rochester, Michigan 48309, USA

  • *Corresponding author. mwu@lamar.colostate.edu

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Issue

Vol. 107, Iss. 14 — 30 September 2011

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