Magnetic anisotropy of crystalline Fe films grown on (001) GaAs substrates using Ge buffer layers

Seul Ki Bac; Hakjoon Lee; Sangyeop Lee; Seonghoon Choi; Taehee Yoo; Sanghoon Lee; X. Liu; J. K. Furdyna

doi:10.1063/1.4942949

Magnetic anisotropy of crystalline Fe films grown on (001) GaAs substrates using Ge buffer layers

Seul Ki Bac, Hakjoon Lee, Sangyeop Lee, Seonghoon Choi, Taehee Yoo, Sanghoon Lee, X. Liu, J. K. Furdyna

Department of Physics

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

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Abstract

Magnetic anisotropy of Fe films grown on (001) GaAs substrates using Ge buffer layers were investigated by planar Hall effect measurements. In addition to phenomena arising from dominant cubic symmetry of the Fe specimen, the study of angular dependence of magnetization reversal revealed breaking of this symmetry in the form of systematic asymmetric shifts of magnetic hysteresis loops around the '110' crystallographic directions. We ascribe such symmetry breaking to an admixture of uniaxial anisotropy associated with the [100] direction in the Fe film. To determine the parameters associated with this uniaxial anisotropy, we quantitatively analyze the asymmetric shifts of the hysteresis loop centers from the '110' directions. Even though the value of these parameters turns out to be relatively small compared to that of the cubic anisotropy (by about two orders of magnitude), they survive up to room temperature.

Original language	English
Article number	055806
Journal	AIP Advances
Volume	6
Issue number	5
DOIs	https://doi.org/10.1063/1.4942949
Publication status	Published - 2016 May

ASJC Scopus subject areas

Physics and Astronomy(all)

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@article{ff479f74c2f54fab9450bf525304819a,

title = "Magnetic anisotropy of crystalline Fe films grown on (001) GaAs substrates using Ge buffer layers",

abstract = "Magnetic anisotropy of Fe films grown on (001) GaAs substrates using Ge buffer layers were investigated by planar Hall effect measurements. In addition to phenomena arising from dominant cubic symmetry of the Fe specimen, the study of angular dependence of magnetization reversal revealed breaking of this symmetry in the form of systematic asymmetric shifts of magnetic hysteresis loops around the '110' crystallographic directions. We ascribe such symmetry breaking to an admixture of uniaxial anisotropy associated with the [100] direction in the Fe film. To determine the parameters associated with this uniaxial anisotropy, we quantitatively analyze the asymmetric shifts of the hysteresis loop centers from the '110' directions. Even though the value of these parameters turns out to be relatively small compared to that of the cubic anisotropy (by about two orders of magnitude), they survive up to room temperature.",

author = "Bac, {Seul Ki} and Hakjoon Lee and Sangyeop Lee and Seonghoon Choi and Taehee Yoo and Sanghoon Lee and X. Liu and Furdyna, {J. K.}",

note = "Funding Information: This research was supported by the Converging Research Center Program through the Ministry of Science, ICT and Future Planning (NRF-2014M3C1A8053744); by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2013R1A1A2004505); by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education (2015R1D1A1A01056614); by a grant from Korea University; and by the National Science Foundation (Grant No. DMR14-00432). Publisher Copyright: {\textcopyright} 2016 Author(s).",

year = "2016",

month = may,

doi = "10.1063/1.4942949",

language = "English",

volume = "6",

journal = "AIP Advances",

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publisher = "American Institute of Physics Publising LLC",

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T1 - Magnetic anisotropy of crystalline Fe films grown on (001) GaAs substrates using Ge buffer layers

AU - Bac, Seul Ki

AU - Lee, Hakjoon

AU - Lee, Sangyeop

AU - Choi, Seonghoon

AU - Yoo, Taehee

AU - Lee, Sanghoon

AU - Liu, X.

AU - Furdyna, J. K.

N1 - Funding Information: This research was supported by the Converging Research Center Program through the Ministry of Science, ICT and Future Planning (NRF-2014M3C1A8053744); by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2013R1A1A2004505); by Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education (2015R1D1A1A01056614); by a grant from Korea University; and by the National Science Foundation (Grant No. DMR14-00432). Publisher Copyright: © 2016 Author(s).

PY - 2016/5

Y1 - 2016/5

N2 - Magnetic anisotropy of Fe films grown on (001) GaAs substrates using Ge buffer layers were investigated by planar Hall effect measurements. In addition to phenomena arising from dominant cubic symmetry of the Fe specimen, the study of angular dependence of magnetization reversal revealed breaking of this symmetry in the form of systematic asymmetric shifts of magnetic hysteresis loops around the '110' crystallographic directions. We ascribe such symmetry breaking to an admixture of uniaxial anisotropy associated with the [100] direction in the Fe film. To determine the parameters associated with this uniaxial anisotropy, we quantitatively analyze the asymmetric shifts of the hysteresis loop centers from the '110' directions. Even though the value of these parameters turns out to be relatively small compared to that of the cubic anisotropy (by about two orders of magnitude), they survive up to room temperature.

AB - Magnetic anisotropy of Fe films grown on (001) GaAs substrates using Ge buffer layers were investigated by planar Hall effect measurements. In addition to phenomena arising from dominant cubic symmetry of the Fe specimen, the study of angular dependence of magnetization reversal revealed breaking of this symmetry in the form of systematic asymmetric shifts of magnetic hysteresis loops around the '110' crystallographic directions. We ascribe such symmetry breaking to an admixture of uniaxial anisotropy associated with the [100] direction in the Fe film. To determine the parameters associated with this uniaxial anisotropy, we quantitatively analyze the asymmetric shifts of the hysteresis loop centers from the '110' directions. Even though the value of these parameters turns out to be relatively small compared to that of the cubic anisotropy (by about two orders of magnitude), they survive up to room temperature.

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SN - 2158-3226

VL - 6

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JF - AIP Advances

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M1 - 055806

ER -

Magnetic anisotropy of crystalline Fe films grown on (001) GaAs substrates using Ge buffer layers

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