Effect of annealing on the magnetic anisotropy of GaMnAs film with low Mn concentration

Sang Hoon Lee, Hyehyeon Byeon, Sangyeop Lee, Taehee Yoo, X. Liu, J. K. Furdyna

Research output: Contribution to journalArticle

Abstract

The effect of annealing on the magnetic anisotropy of a GaMnAs film with a low Mn composition of 2% has been investigated. Hall measurements have been performed with an external field applied in- and out-of-plane. In as-grown samples, the behavior of the Hall resistance indicates that the out-of-plane magnetic anisotropy dominates over the in-plane anisotropy. The vertical anisotropy, however, gradually decreased with increasing annealing temperatures and changed to in-plane dominant anisotropy in the film annealed at 300 °C. Furthermore, it was found that the direction of the uniaxial anisotropy in the domain with the in-plane easy axes, changed from the [110] direction in as-grown film to the [11̄0] direction in the annealed film. This revealed that annealing altered the magnetic anisotropy of the GaMnAs film between out-of-plane and in-plane directions as well as within the film plane.

Original languageEnglish
JournalCurrent Applied Physics
Volume14
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 2014 Mar 14

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Magnetic anisotropy
low concentrations
Annealing
anisotropy
annealing
Anisotropy
Hall resistance
Direction compound
Chemical analysis

Keywords

  • Ferromagnetic semiconductors
  • Magnetic anisotropy
  • Planar Hall effect

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Effect of annealing on the magnetic anisotropy of GaMnAs film with low Mn concentration. / Lee, Sang Hoon; Byeon, Hyehyeon; Lee, Sangyeop; Yoo, Taehee; Liu, X.; Furdyna, J. K.

In: Current Applied Physics, Vol. 14, No. SUPPL. 1, 14.03.2014.

Research output: Contribution to journalArticle

Lee, Sang Hoon ; Byeon, Hyehyeon ; Lee, Sangyeop ; Yoo, Taehee ; Liu, X. ; Furdyna, J. K. / Effect of annealing on the magnetic anisotropy of GaMnAs film with low Mn concentration. In: Current Applied Physics. 2014 ; Vol. 14, No. SUPPL. 1.
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AB - The effect of annealing on the magnetic anisotropy of a GaMnAs film with a low Mn composition of 2% has been investigated. Hall measurements have been performed with an external field applied in- and out-of-plane. In as-grown samples, the behavior of the Hall resistance indicates that the out-of-plane magnetic anisotropy dominates over the in-plane anisotropy. The vertical anisotropy, however, gradually decreased with increasing annealing temperatures and changed to in-plane dominant anisotropy in the film annealed at 300 °C. Furthermore, it was found that the direction of the uniaxial anisotropy in the domain with the in-plane easy axes, changed from the [110] direction in as-grown film to the [11̄0] direction in the annealed film. This revealed that annealing altered the magnetic anisotropy of the GaMnAs film between out-of-plane and in-plane directions as well as within the film plane.

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