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Author Isakovic, A. F. ♦ Berezovsky, J. ♦ Crowell, P. A. ♦ Chen, L. C. ♦ Carr, D. M. ♦ Schultz, B. D. ♦ Palmstrom, C. J.
Sponsorship (US)
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Publisher The American Physical Society
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ANISOTROPY ♦ BONDING ♦ MAGNETIC PROPERTIES ♦ ORIENTATION ♦ PHYSICS ♦ SALT DEPOSITS ♦ SUBSTRATES ♦ SYMMETRY ♦ THIN FILMS
Abstract We demonstrate that two distinct surface contributions to the magnetocrystalline anisotropy can be used to control the magnetic properties of thin films of bcc Fe{sub 1{minus}x}Co{sub x} grown on GaAs (100) and Sc{sub 1{minus}y}Er{sub y}As(100). The bare GaAs (100) surface has twofold symmetry, and Fe{sub 1{minus}x}Co{sub x} films grown directly on it show a strong uniaxial magnetic anisotropy. Fourfold symmetry is restored in films grown on interlayers of Sc{sub 1{minus}y}Er{sub y}As, in which the rock-salt structure provides a fourfold symmetric surface. A uniaxial magnetic anisotropy can be induced in this case by miscutting the substrate towards a {l_brace}111{r_brace} plane, so that vicinal steps run along a {l_angle}011{r_angle} direction. A simple Neel pair-bonding model describes the evolution of the anisotropy with the degree of miscut. For miscut GaAs (100) surfaces without interlayers, both the intrinsic anisotropy originating from the surface bonding and a step-induced term contribute to the total magnetic anisotropy. Depending on the orientation of the miscut, the step contribution can either enhance or partially suppress the intrinsic uniaxial anisotropy. {copyright} 2001 American Institute of Physics.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2001-06-01
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 89
Issue Number 11


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