Magnetic and magneto-optical properties of heteroepitaxial magnetite thin films

J. Cheng; G. E. Sterbinsky; B. W. Wessels

doi:10.1016/j.jcrysgro.2008.05.048

Magnetic and magneto-optical properties of heteroepitaxial magnetite thin films

J. Cheng, G. E. Sterbinsky, B. W. Wessels^*

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

The magnetic and magneto-optical properties of heteroepitaxial magnetite (Fe₃O₄) thin films were investigated. Of interest was the role of misfit strain on determining its magnetic properties. Epitaxial magnetite thin films were deposited by molecular beam epitaxy using molecular oxygen on (1 0 0) oriented SrTiO₃, BaTiO₃ and MgO. Polar spectroscopic magneto-optic Kerr effect (MOKE) measurements on the thin films over near infrared to visible spectral region revealed two dominant magneto-optical transitions. It is shown that the magnetic and magneto-optical properties depend strongly on misfit strain. The longitudinal MOKE saturation rotation angle decreased with the lattice misfit and was attributed to the formation of antiphase boundaries. Coercivity ranged from 19 to 39 mT and was proportional to the lattice misfit. Thin films were all magnetically isotropic within the plane. The magnetic domain size measured by magnetic force microscopy (MFM) decreased with misfit.

Original language	English (US)
Pages (from-to)	3730-3734
Number of pages	5
Journal	Journal of Crystal Growth
Volume	310
Issue number	16
DOIs	https://doi.org/10.1016/j.jcrysgro.2008.05.048
State	Published - Aug 1 2008

Keywords

A1. Characterization
A3. Molecular beam epitaxy
B2. Magnetic materials

ASJC Scopus subject areas

Condensed Matter Physics
Inorganic Chemistry
Materials Chemistry

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10.1016/j.jcrysgro.2008.05.048

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title = "Magnetic and magneto-optical properties of heteroepitaxial magnetite thin films",

abstract = "The magnetic and magneto-optical properties of heteroepitaxial magnetite (Fe3O4) thin films were investigated. Of interest was the role of misfit strain on determining its magnetic properties. Epitaxial magnetite thin films were deposited by molecular beam epitaxy using molecular oxygen on (1 0 0) oriented SrTiO3, BaTiO3 and MgO. Polar spectroscopic magneto-optic Kerr effect (MOKE) measurements on the thin films over near infrared to visible spectral region revealed two dominant magneto-optical transitions. It is shown that the magnetic and magneto-optical properties depend strongly on misfit strain. The longitudinal MOKE saturation rotation angle decreased with the lattice misfit and was attributed to the formation of antiphase boundaries. Coercivity ranged from 19 to 39 mT and was proportional to the lattice misfit. Thin films were all magnetically isotropic within the plane. The magnetic domain size measured by magnetic force microscopy (MFM) decreased with misfit.",

keywords = "A1. Characterization, A3. Molecular beam epitaxy, B2. Magnetic materials",

author = "J. Cheng and Sterbinsky, {G. E.} and Wessels, {B. W.}",

note = "Funding Information: This work was supported by the NSF under grants DMR-0076097 and DMR-0511523, and the Argonne National Laboratory by the US Department of Energy, Office of Science and Office of Basic Energy Sciences under Contract No. W-31-109-Eng-38. This work made use of NUANCE Central Facilities supported by the MRSEC program of the National Science Foundation (DMR-0076097) at the Materials Research Center of Northwestern University. ",

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doi = "10.1016/j.jcrysgro.2008.05.048",

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AU - Sterbinsky, G. E.

AU - Wessels, B. W.

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PY - 2008/8/1

Y1 - 2008/8/1

N2 - The magnetic and magneto-optical properties of heteroepitaxial magnetite (Fe3O4) thin films were investigated. Of interest was the role of misfit strain on determining its magnetic properties. Epitaxial magnetite thin films were deposited by molecular beam epitaxy using molecular oxygen on (1 0 0) oriented SrTiO3, BaTiO3 and MgO. Polar spectroscopic magneto-optic Kerr effect (MOKE) measurements on the thin films over near infrared to visible spectral region revealed two dominant magneto-optical transitions. It is shown that the magnetic and magneto-optical properties depend strongly on misfit strain. The longitudinal MOKE saturation rotation angle decreased with the lattice misfit and was attributed to the formation of antiphase boundaries. Coercivity ranged from 19 to 39 mT and was proportional to the lattice misfit. Thin films were all magnetically isotropic within the plane. The magnetic domain size measured by magnetic force microscopy (MFM) decreased with misfit.

AB - The magnetic and magneto-optical properties of heteroepitaxial magnetite (Fe3O4) thin films were investigated. Of interest was the role of misfit strain on determining its magnetic properties. Epitaxial magnetite thin films were deposited by molecular beam epitaxy using molecular oxygen on (1 0 0) oriented SrTiO3, BaTiO3 and MgO. Polar spectroscopic magneto-optic Kerr effect (MOKE) measurements on the thin films over near infrared to visible spectral region revealed two dominant magneto-optical transitions. It is shown that the magnetic and magneto-optical properties depend strongly on misfit strain. The longitudinal MOKE saturation rotation angle decreased with the lattice misfit and was attributed to the formation of antiphase boundaries. Coercivity ranged from 19 to 39 mT and was proportional to the lattice misfit. Thin films were all magnetically isotropic within the plane. The magnetic domain size measured by magnetic force microscopy (MFM) decreased with misfit.

KW - A1. Characterization

KW - A3. Molecular beam epitaxy

KW - B2. Magnetic materials

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Magnetic and magneto-optical properties of heteroepitaxial magnetite thin films

Abstract

Keywords

ASJC Scopus subject areas

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