Spin pumping by parametrically excited exchange magnons

Abstract

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.

References in corpus (6)

• Enhanced Gilbert Damping in Thin Ferromagnetic Films
• Spin Seebeck insulator
• Theory of magnon-driven spin Seebeck effect
• Electrical detection of spin pumping due to the precessing magnetization of a single ferromagnet
• Enhancement of the spin pumping efficiency by spin-wave mode selection
• Field-induced transition from parallel to perpendicular parametric pumping for a microstrip transducer

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