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

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

doi:10.1016/j.jmmm.2004.09.066

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 journal › Article › peer-review

46 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 language	English
Pages (from-to)	463-467
Number of pages	5
Journal	Journal of Magnetism and Magnetic Materials
Volume	286
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.jmmm.2004.09.066
Publication status	Published - Feb 2005
Externally published	Yes

Keywords

Exchange bias
Grain boundaries
Magnetite
Thin epitaxial films

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2004.09.066

Cite this

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title = "Antiphase boundaries induced exchange coupling in epitaxial Fe 3O 4 thin films",

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.",

keywords = "Exchange bias, Grain boundaries, Magnetite, Thin epitaxial films",

author = "Arora, {S. K.} and Sofin, {R. G.S.} and A. Nolan and Shvets, {I. V.}",

note = "Funding Information: The financial support from Science Foundation of Ireland is gratefully acknowledged (Project No. 00/PI.1/C042). ",

year = "2005",

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language = "English",

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TY - JOUR

T1 - Antiphase boundaries induced exchange coupling in epitaxial Fe 3O 4 thin films

AU - Arora, S. K.

AU - Sofin, R. G.S.

AU - Nolan, A.

AU - Shvets, I. V.

N1 - Funding Information: The financial support from Science Foundation of Ireland is gratefully acknowledged (Project No. 00/PI.1/C042).

PY - 2005/2

Y1 - 2005/2

N2 - 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.

AB - 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.

KW - Exchange bias

KW - Grain boundaries

KW - Magnetite

KW - Thin epitaxial films

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