Magnetic pole pinning at rectangular defects on MnAs/GaAs(0 0 1)

H. Kuramochi, J. Okabayashi, F. Takano, M. Mizuguchi, T. Manago, H. Akinaga

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Strong magnetic poles at characteristic rectangular defects have been observed using a magnetic force microscope on a MnAs(1̄ 1 0 0) thin film with the thickness of 30 nm. The MnAs thin film was epitaxially grown on a GaAs(0 0 1) substrate. The magnetic poles were in one-arranging direction, being independent of the magnetization direction of the film. The poles were pinned at the edges of the rectangular defects until just below the Curie temperature, and formed a stable magnetic-field loop on the MnAs surface. The stability of the magnetic pole pinning shows the distinctive feature of the magnetic domain structure on the surface with a strong anisotropy, which was built in the heterostructure of MnAs and GaAs.

Original languageEnglish
Pages (from-to)192-198
Number of pages7
JournalSurface Science
Issue number1-3
Publication statusPublished - 2004 Feb 10
Externally publishedYes


  • Arsenic
  • Atomic force microscopy
  • Gallium arsenide
  • Magnetic measurements
  • Magnetic phenomena (cyclotron resonance, phase transitions, etc.)
  • Manganese
  • Metal-semiconductor magnetic thin film structures

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry


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