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Direct observation of saw‐tooth typed domain wall jumps in epitaxial ferromagnetic MnAs film on GaAs(001)
Author(s) -
Ryu KwangSu,
Akinaga Hiro,
Shin SungChul
Publication year - 2007
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200777227
Subject(s) - condensed matter physics , ferromagnetism , domain wall (magnetism) , materials science , epitaxy , domain (mathematical analysis) , anisotropy , magnetic domain , magnetic anisotropy , anisotropy energy , dipole , optics , magnetization , physics , magnetic field , nanotechnology , mathematics , mathematical analysis , layer (electronics) , quantum mechanics
We report the direct observation of saw‐tooth domain wall jumps in epitaxial ferromagnetic MnAs film on GaAs(001) via a magneto‐optical Kerr effect microscope. Interestingly, it is found that the saw‐tooth domain wall jumps are generated along an easy axis orientation and the saw‐tooth angle is nearly constant irrespective of the applied field direction. These observations can be understood on the basis of strong uniaxial anisotropy on the sample plane. The analytical study reveals that the saw‐tooth domain wall structure results from competition between the domain wall energy and the dipolar energy. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)