Antiphase boundaries induced exchange coupling in epitaxial Fe 3O 4 thin films

S. K. Arora, R. G S Sofin, A. Nolan, I. V. Shvets

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

We have observed an exchange bias effect on field cooling of epitaxial magnetite, Fe 3O 4, films on MgO (1 0 0) substrates. We attribute this effect to the presence of antiphase boundaries (APBs). Magnitude of the exchange bias field (H e) strongly depends on the thermo-magnetic history of the sample. The strength of the H e was found to increase with an increase in film thickness and is attributed to the strain driven redistribution of atoms in the vicinity of APBs leading to enhanced antiferromagnetic exchange interactions.

Original languageEnglish
Pages (from-to)463-467
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume286
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - Feb 2005

Fingerprint

Ferrosoferric Oxide
Exchange coupling
antiphase boundaries
Exchange interactions
Magnetite
Film thickness
Cooling
Thin films
Atoms
Substrates
thin films
magnetite
film thickness
histories
cooling
atoms
interactions

Keywords

  • Exchange bias
  • Grain boundaries
  • Magnetite
  • Thin epitaxial films

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Antiphase boundaries induced exchange coupling in epitaxial Fe 3O 4 thin films. / Arora, S. K.; Sofin, R. G S; Nolan, A.; Shvets, I. V.

In: Journal of Magnetism and Magnetic Materials, Vol. 286, No. SPEC. ISS., 02.2005, p. 463-467.

Research output: Contribution to journalArticle

Arora, S. K. ; Sofin, R. G S ; Nolan, A. ; Shvets, I. V. / Antiphase boundaries induced exchange coupling in epitaxial Fe 3O 4 thin films. In: Journal of Magnetism and Magnetic Materials. 2005 ; Vol. 286, No. SPEC. ISS. pp. 463-467.
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