Bistability condition of circular nanomagnet

Osamu Kitakami, Satoshi Okamoto, Nobuaki Kikuchi, Takehito Shimatsu, Kaname Mitsuzuka, Hajime Aoi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We have examined the bistability condition of a circular magnetic dot by extending Thiele's bubble domain theory for an infinite continuous film to a finite one, and have found that the dot is always bistable at least when its diameter is D ≤ 4 /, where / is the characteristic length given by / = σw/4πMa2w: wall energy per unit area, Ma: saturation magnetization). This domain theory naturally explains the dot size dependence of the nucleation field without any assumptions.

Original languageEnglish
Article number123002
JournalApplied Physics Express
Volume2
Issue number12
DOIs
Publication statusPublished - 2009 Dec 1

ASJC Scopus subject areas

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

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