Saturation of attenuation length of spin waves in thick permalloy films

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

Research output: Contribution to journalArticle

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

Fingerprint

Spin waves
Magnetostatics
Permalloys (trademark)
Thick films
magnons
attenuation
saturation
magnetostatics
Eddy currents
group velocity
Wave propagation
Damping
eddy currents
wave propagation
pumping
damping
augmentation
causes

ASJC Scopus subject areas

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

Cite this

Saturation of attenuation length of spin waves in thick permalloy films. / Ota, Masaki; Yamanoi, Kazuto; Kasai, Shinya; Mitani, Seiji; Manago, Takashi.

In: Japanese journal of applied physics, Vol. 54, No. 11, 113001, 01.11.2015.

Research output: Contribution to journalArticle

Ota, Masaki ; Yamanoi, Kazuto ; Kasai, Shinya ; Mitani, Seiji ; Manago, Takashi. / Saturation of attenuation length of spin waves in thick permalloy films. In: Japanese journal of applied physics. 2015 ; Vol. 54, No. 11.
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