Electric control of magnetization relaxation in thin film magnetic insulators

Zihui Wang, Yiyan Sun, Young Yeal Song, Mingzhong Wu, Helmut Schultheib, John E. Pearson, Axel Hoffmann

Research output: Contribution to journalArticlepeer-review

Abstract

Control of magnetization relaxation in magnetic insulators via interfacial spin scattering is demonstrated. The experiments use nanometer-thick yttrium iron garnet (YIG)/Pt layered structures, with the Pt layer biased by an electric voltage. The bias voltage produces a spin current across the Pt thickness. As this current scatters off the YIG surface, it exerts a torque on the YIG surface spins. This torque can reduce or enhance the damping and thereby decrease or increase the ferromagnetic resonance linewidth of the YIG film, depending on the field/current configuration.

Original languageEnglish (US)
Article number162511
JournalApplied Physics Letters
Volume99
Issue number16
DOIs
StatePublished - Oct 17 2011
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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