Coercivity induced by random field at ferromagnetic and antiferromagnetic interfaces

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

Research output: Contribution to journalConference articlepeer-review

76 Scopus citations

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
EventProceedings of the 1998 3rd International Symposium on Metallic Multilayers (MML-98) - Vancouver, BC, Can
Duration: Jun 14 1998Jun 19 1998

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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