Saturation of attenuation length of spin waves in thick permalloy films

Masaki Ota, Kazuto Yamanoi, Shinya Kasai, Seiji Mitani, Takashi Manago

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3 Citations (Scopus)

Abstract

The permalloy (Py) thickness dependence of the magnetostatic spin wave (MSSW) propagation was investigated. Large-group velocity is realized for thick Py films and the MSSW can propagate more than 150 μm. However, attenuation length hardly changes for samples with a Py thickness of more than 100 nm, despite the increasing group velocity with increasing thickness. The eddy current effect decreases the wave channel thickness and it could cause the damping enhancement due to intralayer spin pumping in thick Py films.

Original languageEnglish
Article number113001
JournalJapanese journal of applied physics
Volume54
Issue number11
DOIs
Publication statusPublished - 2015 Nov 1
Externally publishedYes

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ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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