Analytic theory of wall configuration and depinning mechanism in magnetic nanostructure with perpendicular magnetic anisotropy

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We present an analytic theory of the domain wall depinning in magnetic nanostructure with perpendicular magnetic anisotropy. The variational principle reveals that the wall is bent in the form of a circular arc which intersects the structure boundaries perpendicularly. The radius is inversely proportional to the magnetic field. With increasing the field the radius shrinks, followed by depinning from the constriction when the arc is not geometrically allowed. The depinning field is proportional to the sine of the constriction angle and the inverse of the constriction width. The validity of the theory is confirmed by comparison with the micromagnetic simulation. (C) 2009 Elsevier B.V. All rights reserved
Publisher
ELSEVIER SCIENCE BV
Issue Date
2009-07
Language
English
Article Type
Article
Keywords

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Citation

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, v.321, no.14, pp.2197 - 2199

ISSN
0304-8853
DOI
10.1016/j.jmmm.2009.01.031
URI
http://hdl.handle.net/10203/214028
Appears in Collection
PH-Journal Papers(저널논문)
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