Thickness dependence of uniaxial anisotropy fields in GaMnAs films

Seul Ki Bac, Hakjoon Lee, Sangyeop Lee, Seonghoon Choi, Taehee Yoo, Sang Hoon Lee, Xinyu Liu, Jacek Furdyna

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Our investigation of thin GaMnAs films with different thicknesses revealed that the magnetic properties of this material strongly depend on film thickness. For this study, a single GaMnAs film was selectively etched, and its properties were then investigated by planar Hall effect measurements. A particularly important conclusion from the results is the emergence of a uniaxial anisotropy field along the [100] crystalline direction, which increases rapidly with increasing film thickness. We argue that such thickness dependence of the [100] uniaxial anisotropy results from the crystal structure of the film, rather than from the effects of the interface between the GaMnAs and the substrate.

Original languageEnglish
Article number033201
JournalApplied Physics Express
Volume8
Issue number3
DOIs
Publication statusPublished - 2015 Mar 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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    Bac, S. K., Lee, H., Lee, S., Choi, S., Yoo, T., Lee, S. H., Liu, X., & Furdyna, J. (2015). Thickness dependence of uniaxial anisotropy fields in GaMnAs films. Applied Physics Express, 8(3), [033201]. https://doi.org/10.7567/APEX.8.033201