Brillouin Light Scattering Study of the Magnetic Anisotropy in bcc-Fe(100) Ultrathin Films Grown on GaAs(100) Surfaces With Different Reconstructions

Title
Brillouin Light Scattering Study of the Magnetic Anisotropy in bcc-Fe(100) Ultrathin Films Grown on GaAs(100) Surfaces With Different Reconstructions
Authors
Ha, S.S.; Kim, N.H.; You, C.Y.
Keywords
Brillouin light scattering, GaAs reconstruction, magnetic anisotropy
Issue Date
2009-06
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Abstract
We investigated the magnetic anisotropy of ultrathin bec-Fe (001) films with a fcc-Au(001) cover layer, grown onto GaAs (001) (4 x 1) and (2 x 6)/(3 x 6) reconstructed surfaces. The magneto-optical Kerr effect hysteresis loops revealed existence of a strong in-plane uniaxial magnetic anisotropy in the Fe films grown on both the surfaces. Details of the in-plane uniaxial anisotropy (K-U), cubic anisotropy (K-C), and effective demagnetization field (4 pi M-eff) were studied by Brillouin light scattering method. We observed a stronger reduction of K-U, K-C, and 4 pi M-eff in thinner Fe layers (below 1.3 nm) grown on both the surfaces. In the case of Fe films grown on GaAs (4 x 1) surface, anisotropies observed were smaller than that for the (2 x 6)/(3 x 6) surface. This reflects the role of surface structure in determining the magnetic anisotropies.
URI
http://dspace.inha.ac.kr/handle/10505/1654
ISSN
0018-9464
Appears in Collections:
College of Natural Science(자연과학대학) > Physics (물리학) > Journal Papers, Peports(물리학 학술논문, 보고서)
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