Effect of light illumination on the [100] uniaxial magnetic anisotropy of GaMnAs film

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

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The effect of light illumination on the magnetic anisotropy of GaMnAs has been investigated by using the planar Hall effect measurement. In as-grown GaMnAs, typical types of magnetic anisotropies, cubic crystalline anisotropy along the 〈100〉 directions and uniaxial anisotropy along the [110] direction, were clearly observed in the planar Hall resistance (PHR) measurements. The behavior of the PHR, however, changed after light illumination by showing significant asymmetry between the [100] and the [010] directions, which was explained by the appearance (or enhancement) of a new type of uniaxial anisotropy along the [100] direction in the film. The experiment reveals that light illumination can significantly alter the magnetic anisotropies of the GaMnAs film by changing the magnitude of existing anisotropies as well as inducing anisotropy along the [100] direction.

Original languageEnglish
Pages (from-to)27-30
Number of pages4
JournalSolid State Communications
Publication statusPublished - 2014 Aug

Bibliographical note

Funding Information:
This research was supported by the Converging Research Center Program through the Ministry of Science , ICT and Future Planning ( 2013K000311 ), by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science , ICT & Future Planning ( 2013R1A1A2004505 ); by a Korea University Grant; and by the National Science Foundation Grants DMR10-05851.


  • A. Ferromagnetism
  • A. Semiconductor
  • D. Anisotropy
  • E. Transport

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics
  • Materials Chemistry


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