Magnetic anisotropy of Ga1-x Mnx As films with additional nonmagnetic donor doping

Hyung Chan Kim; S. Khym; Sanghoon Lee; X. Liu; J. K. Furdyna

doi:10.1063/1.3352973

Magnetic anisotropy of Ga_1-x Mn_x As films with additional nonmagnetic donor doping

Hyung Chan Kim, S. Khym, Sanghoon Lee, X. Liu, J. K. Furdyna

Department of Physics

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

5 Citations (Scopus)

Abstract

We have investigated the magnetic anisotropy properties of a series of ferromagnetic Ga_1-xMn_x As:Si films by transport measurements. The angular dependences of the planar Hall resistance (PHR) were analyzed in terms of the magnetic free energy to obtain the anisotropy fields. The cubic component of the magnetic anisotropy is much stronger than the uniaxial component at low temperature, although its dominance rapidly decreases with increasing temperature. The direction of the uniaxial anisotropy at 16 K lies along either the [1- 11] or the [110] direction depending on the Mn composition in the series. The uniaxial anisotropy direction, however, changed along the [110] direction regardless of the Mn concentration in the samples as the temperature increases.

Original language	English
Article number	09C303
Journal	Journal of Applied Physics
Volume	107
Issue number	9
DOIs	https://doi.org/10.1063/1.3352973
Publication status	Published - 2010 May 1

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Magnetic anisotropy of Ga1-x Mnx As films with additional nonmagnetic donor doping",

abstract = "We have investigated the magnetic anisotropy properties of a series of ferromagnetic Ga1-xMnx As:Si films by transport measurements. The angular dependences of the planar Hall resistance (PHR) were analyzed in terms of the magnetic free energy to obtain the anisotropy fields. The cubic component of the magnetic anisotropy is much stronger than the uniaxial component at low temperature, although its dominance rapidly decreases with increasing temperature. The direction of the uniaxial anisotropy at 16 K lies along either the [1- 11] or the [110] direction depending on the Mn composition in the series. The uniaxial anisotropy direction, however, changed along the [110] direction regardless of the Mn concentration in the samples as the temperature increases.",

author = "Kim, {Hyung Chan} and S. Khym and Sanghoon Lee and X. Liu and Furdyna, {J. K.}",

note = "Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (Grant No. 2009-0071795), the Seoul R&DB Program (Grant No. 10543), and the National Science Foundation (Grant No. DMR06-03762).",

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T1 - Magnetic anisotropy of Ga1-x Mnx As films with additional nonmagnetic donor doping

AU - Kim, Hyung Chan

AU - Khym, S.

AU - Lee, Sanghoon

AU - Liu, X.

AU - Furdyna, J. K.

N1 - Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (Grant No. 2009-0071795), the Seoul R&DB Program (Grant No. 10543), and the National Science Foundation (Grant No. DMR06-03762).

PY - 2010/5/1

Y1 - 2010/5/1

N2 - We have investigated the magnetic anisotropy properties of a series of ferromagnetic Ga1-xMnx As:Si films by transport measurements. The angular dependences of the planar Hall resistance (PHR) were analyzed in terms of the magnetic free energy to obtain the anisotropy fields. The cubic component of the magnetic anisotropy is much stronger than the uniaxial component at low temperature, although its dominance rapidly decreases with increasing temperature. The direction of the uniaxial anisotropy at 16 K lies along either the [1- 11] or the [110] direction depending on the Mn composition in the series. The uniaxial anisotropy direction, however, changed along the [110] direction regardless of the Mn concentration in the samples as the temperature increases.

AB - We have investigated the magnetic anisotropy properties of a series of ferromagnetic Ga1-xMnx As:Si films by transport measurements. The angular dependences of the planar Hall resistance (PHR) were analyzed in terms of the magnetic free energy to obtain the anisotropy fields. The cubic component of the magnetic anisotropy is much stronger than the uniaxial component at low temperature, although its dominance rapidly decreases with increasing temperature. The direction of the uniaxial anisotropy at 16 K lies along either the [1- 11] or the [110] direction depending on the Mn composition in the series. The uniaxial anisotropy direction, however, changed along the [110] direction regardless of the Mn concentration in the samples as the temperature increases.

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