DOI: 10.1063/1.2189967. Origin of uniaxial magnetic anisotropy in epitaxial InMnAs thin films

Origin of uniaxial magnetic anisotropy in epitaxial InMnAs thin films

10.1063/1.2189967

Crossref journal-article

AIP Publishing

Journal of Applied Physics (317)

Abstract

The in-plane magnetic anisotropy of (001) oriented InMnAs epitaxial films grown on InAs and GaSb were measured by magnetometry and the longitudinal magneto-optic Kerr effect. InMnAs epitaxial layers when grown on InAs exhibit a significant in-plane uniaxial anisotropy field of −0.66kG at room temperature. The uniaxial magnetic anisotropy is attributed to differences in Mn atomic density along the [110] and [1¯10] directions, resulting from the uniaxial surface symmetry of the InAs (001) surface. The asymmetry of the Mn density is preserved in InMnAs films grown on InAs by a two-dimensional growth mechanism. However, disorder as evidenced by increasing surface pitting perturbs the growth from an ideal layer-by-layer mechanism. This results in a decrease in the magnitude of the uniaxial anisotropy field with increasing thickness between 320–630nm. In contrast, InMnAs films grown on GaSb are magnetically isotropic for a thickness range of 50–420nm. The isotropic behavior is attributed to three-dimensional island growth of films grown on GaSb that eliminates long range order.

Bibliography

Chiu, P. T., May, S. J., & Wessels, B. W. (2006). Origin of uniaxial magnetic anisotropy in epitaxial InMnAs thin films. Journal of Applied Physics, 99(8).

Authors 3

P. T. Chiu (first)
S. J. May (additional)
B. W. Wessels (additional)

References 18 Referenced 10

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Dates

Type	When
Created	19 years, 2 months ago (June 12, 2006, 12:13 p.m.)
Deposited	2 years, 2 months ago (June 30, 2023, 9:29 p.m.)
Indexed	1 month ago (July 30, 2025, 6:47 a.m.)
Issued	19 years, 4 months ago (April 15, 2006)
Published	19 years, 4 months ago (April 15, 2006)
Published Online	19 years, 4 months ago (May 1, 2006)
Published Print	19 years, 4 months ago (April 15, 2006)

Funders 0

None

BibTeX

@article{Chiu_2006, title={Origin of uniaxial magnetic anisotropy in epitaxial InMnAs thin films}, volume={99}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.2189967}, DOI={10.1063/1.2189967}, number={8}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Chiu, P. T. and May, S. J. and Wessels, B. W.}, year={2006}, month=apr }

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