Anisotropy in thin film galfenol deposited on LiNbO3 as measured by MOKE

Christopher Clark; Andrew Huxley; David Czerski; Paul Record

doi:10.1016/j.jmmm.2021.167799

Anisotropy in thin film galfenol deposited on LiNbO₃ as measured by MOKE

Christopher Clark^*
, Andrew Huxley
, David Czerski
, Paul Record

^*Corresponding author for this work

School of Engineering & Physical Sciences

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

4 Citations (Scopus)

Abstract

We report the magnetic anisotropy of films of the magnetostrictive alloy galfenol deposited on a LiNbO₃ substrate measured with the magneto-optic Kerr effect (MOKE). This anisotropy is present in 250 nm thick films but is absent in 600 nm thick films, most probably showing a loss in epitaxy with thickness. An anisotropy constant of k_u = 3.45kJm⁻³ is deduced. Magnetic stripe domains (width 30 μm) oriented along the easy axis, parallel to the substrate (11¯00) axis, could be created and imaged.

Original language	English
Article number	167799
Journal	Journal of Magnetism and Magnetic Materials
Volume	529
Early online date	4 Feb 2021
DOIs	https://doi.org/10.1016/j.jmmm.2021.167799
Publication status	Published - 1 Jul 2021

Keywords

FeGa
Magnetic anisotropy
MOKE
Thin film

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2021.167799

Cite this

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title = "Anisotropy in thin film galfenol deposited on LiNbO3 as measured by MOKE",

abstract = "We report the magnetic anisotropy of films of the magnetostrictive alloy galfenol deposited on a LiNbO3 substrate measured with the magneto-optic Kerr effect (MOKE). This anisotropy is present in 250 nm thick films but is absent in 600 nm thick films, most probably showing a loss in epitaxy with thickness. An anisotropy constant of ku = 3.45kJm−3 is deduced. Magnetic stripe domains (width 30 μm) oriented along the easy axis, parallel to the substrate (11¯00) axis, could be created and imaged.",

keywords = "FeGa, Magnetic anisotropy, MOKE, Thin film",

author = "Christopher Clark and Andrew Huxley and David Czerski and Paul Record",

note = "Funding Information: We wish to gratefully acknowledge funding from the EPSRC (Grant No. EP/R013004/1). Publisher Copyright: {\textcopyright} 2021 Elsevier B.V. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

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AU - Clark, Christopher

AU - Huxley, Andrew

AU - Czerski, David

AU - Record, Paul

N1 - Funding Information: We wish to gratefully acknowledge funding from the EPSRC (Grant No. EP/R013004/1). Publisher Copyright: © 2021 Elsevier B.V. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/7/1

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N2 - We report the magnetic anisotropy of films of the magnetostrictive alloy galfenol deposited on a LiNbO3 substrate measured with the magneto-optic Kerr effect (MOKE). This anisotropy is present in 250 nm thick films but is absent in 600 nm thick films, most probably showing a loss in epitaxy with thickness. An anisotropy constant of ku = 3.45kJm−3 is deduced. Magnetic stripe domains (width 30 μm) oriented along the easy axis, parallel to the substrate (11¯00) axis, could be created and imaged.

AB - We report the magnetic anisotropy of films of the magnetostrictive alloy galfenol deposited on a LiNbO3 substrate measured with the magneto-optic Kerr effect (MOKE). This anisotropy is present in 250 nm thick films but is absent in 600 nm thick films, most probably showing a loss in epitaxy with thickness. An anisotropy constant of ku = 3.45kJm−3 is deduced. Magnetic stripe domains (width 30 μm) oriented along the easy axis, parallel to the substrate (11¯00) axis, could be created and imaged.

KW - FeGa

KW - Magnetic anisotropy

KW - MOKE

KW - Thin film

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DO - 10.1016/j.jmmm.2021.167799

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VL - 529

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