Abstract
Control of spin waves in a ferrite thin film via interfacial spin scattering was demonstrated. The experiments used a -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.
- Received 12 April 2011
DOI:https://doi.org/10.1103/PhysRevLett.107.146602
© 2011 American Physical Society
Synopsis
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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