Antiphase boundaries induced exchange coupling in epitaxial Fe3O4 thin films

We have observed an exchange bias effect on field cooling of epitaxial magnetite, Fe3O4, films on MgO (100) substrates. We attribute this effect to the presence of antiphase boundaries (APBs). Magnitude of the exchange bias field (He) strongly depends on the thermo-magnetic history of the sample. Th...

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Bibliographic Details
Published inJournal of magnetism and magnetic materials Vol. 286; pp. 463 - 467
Main Authors Arora, S.K., Sofin, R.G.S., Nolan, A., Shvets, I.V.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Amsterdam Elsevier B.V 01.02.2005
Elsevier Science
Subjects
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Exchange bias
Grain boundaries
Magnetic properties and materials
Magnetite
Physics
Thin epitaxial films
Grain boundaries
75.50Bb
Magnetite
75.70i
Thin epitaxial films
Exchange bias
Antiferromagnetism
Inorganic compounds
Epitaxial layers
Cooling
Thermomagnetic effects
Anti-phase boundaries
Transition element compounds
Thin films
Thickness
Bias voltage
Magnesium oxides
Iron oxides
Exchange interactions
75.50Bb Magnetite
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Summary:We have observed an exchange bias effect on field cooling of epitaxial magnetite, Fe3O4, films on MgO (100) substrates. We attribute this effect to the presence of antiphase boundaries (APBs). Magnitude of the exchange bias field (He) strongly depends on the thermo-magnetic history of the sample. The strength of the He 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.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0304-8853
DOI:10.1016/j.jmmm.2004.09.066