Size dependence of ferromagnetic resonance frequency in submicron patterned magnet

Takashi Manago, Kazuto Yamanoi, Satoshi Yakata, Takashi Kimura

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We investigated the size effect on ferromagnetic resonance (FMR) in a submicron-wide single permalloy bar. The resonant frequency markedly increased with decreasing bar width to less than 1 m, since the demagnetizing field is effectively modified by changing the bar width even in thin films. The resonant frequency difference between 100- and 1000-nm-wide bars was over 4 GHz in the absence of a magnetic field. This characteristic is promising for practical microwave devices because the desired resonant frequency can be obtained simply by varying the width of narrow ferromagnetic bars so that it is not necessary to change the material or magnetic field.

Original languageEnglish
Article number053001
JournalJapanese journal of applied physics
Volume52
Issue number5 PART 1
DOIs
Publication statusPublished - 2013 May 1
Externally publishedYes

ASJC Scopus subject areas

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

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