Spin pumping by parametrically excited exchange magnons

Details Spin pumping by parametrically excited exchange magnons Spin pumping by parametrically excited exchange magnons

2011-03-11

arxiv.org/abs/1103.2229v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We experimentally show that exchange magnons can be detected using a combination of spin pumping and inverse spin-Hall effect (iSHE) proving its wavelength integrating capability down to the sub-micrometer scale. The magnons were injected in a ferrimagnetic yttrium iron garnet film by parametric pumping and the iSHE-induced voltage was detected in an attached Pt layer. The role of the density, wavelength, and spatial localization of the magnons for the spin pumping efficiency is revealed. This study opens the field of the magnon-based information processing to magnons with nano-scale wavelengths.

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