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The Ga vacancy mediated microstructure evolution of (Ga,Mn)As during growth and postgrowth annealing is studied using a multiscale approach. The migration barriers for the Ga vacancies and substitutio...

Mn  L3,2 x-ray absorption and magnetic circular dichroism in ferromagnetic Ga1–xMnxP

Appl. Phys. Lett. 89, 012504 (2006); doi:10.1063/1.2219713

Published 7 July 2006

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P. R. Stone, M. A. Scarpulla, R. Farshchi, I. D. Sharp, E. E. Haller, and O. D. Dubon
Department of Materials Science and Engineering, University of California, Berkeley, California 94720 and Lawrence Berkeley National Laboratory, Berkeley, California 94720

K. M. Yu and J. W. Beeman
Lawrence Berkeley National Laboratory, Berkeley, California 94720

E. Arenholz and J. D. Denlinger
Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720

H. Ohldag
Stanford Synchrotron Radiation Laboratory, Menlo Park, California 94025
We have measured the x-ray absorption and x-ray magnetic circular dichroism (XMCD) at the Mn  L3,2 edges in ferromagnetic Ga1–xMnxP films for 0.018<=x<=0.042. Large XMCD asymmetries at the L3 edge indicate significant spin polarization of the density of states at the Fermi energy. The temperature dependence of the XMCD and moment per Mn of 2.67±0.45µB calculated using sum rules are consistent with magnetometry values. The spectral shapes of the x-ray absorption and XMCD are nearly identical with those for Ga1–xMnxAs indicating that the hybridization of Mn d states and anion p states is similar in the two materials. ©2006 American Institute of Physics
History: Received 26 March 2006; accepted 19 May 2006; published 7 July 2006
Permalink: http://link.aip.org/link/?APPLAB/89/012504/1
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KEYWORDS and PACS

Keywords
PACS
  • 78.70.Dm
    X-ray absorption spectra (condensed matter)
  • 78.20.Ls
    Magnetooptical effects (bulk materials/thin films)
  • 75.50.Pp
    Magnetic semiconductors
  • 75.50.Dd
    Nonmetallic ferromagnetic materials
  • 75.30.Cr
    Saturation moments and magnetic susceptibilities in magnetically ordered materials
  • 75.70.Ak
    Magnetic properties of monolayers and thin films
  • YEAR: 2006

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0003-6951 (print)   1077-3118 (online)
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