Coercivity induced by random field at ferromagnetic and antiferromagnetic interfaces

Shufeng Zhang, D. V. Dimitrov, G. C. Hadjipanayis, J. W. Cai, C. L. Chien

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

In the presence of random fields at an interface between a ferromagnetic and an antiferromagnetic layer, the domain walls in the ferromagnetic layer are pinned by local minimum energy. To move the domain walls, an applied magnetic field must be large enough to overcome statistically fluctuating energy. We have calculated this energy and found that the coercivity can be as large as a few kOe for a thin ferromagnetic layer. It is also found that the coercive field at low temperature scales as 1/t3/2 where t is the F layer thickness, and the coercive field decreases strongly with temperature.

Original languageEnglish (US)
Pages (from-to)468-470
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume198
DOIs
StatePublished - Jun 1 1999
Externally publishedYes

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Domain walls
Coercive force
coercivity
F region
Temperature scales
domain wall
temperature scales
Magnetic fields
energy
magnetic fields
Temperature
temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Coercivity induced by random field at ferromagnetic and antiferromagnetic interfaces. / Zhang, Shufeng; Dimitrov, D. V.; Hadjipanayis, G. C.; Cai, J. W.; Chien, C. L.

In: Journal of Magnetism and Magnetic Materials, Vol. 198, 01.06.1999, p. 468-470.

Research output: Contribution to journalArticle

Zhang, Shufeng ; Dimitrov, D. V. ; Hadjipanayis, G. C. ; Cai, J. W. ; Chien, C. L. / Coercivity induced by random field at ferromagnetic and antiferromagnetic interfaces. In: Journal of Magnetism and Magnetic Materials. 1999 ; Vol. 198. pp. 468-470.
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