Bistability condition of circular nanomagnet

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

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


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
Issue number12
Publication statusPublished - 2009 Dec


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