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Mn L3,2 X-ray Absorption Spectroscopy And Magnetic Circular Dichroism In Ferromagnetic Ga1−xMnxP

AIP Conf. Proc. -- April 10, 2007 -- Volume 893, pp. 1177-1178
PHYSICS OF SEMICONDUCTORS: 28th International Conference on the Physics of Semiconductors - ICPS 2006; doi:10.1063/1.2730317

Issue Date: 10 April 2007

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P. R. Stone,1,2 M. A. Scarpulla,1,2 R. Farshchi,1,2 I. D. Sharp,1,2 J. W. Beeman,2 K. M. Yu,2 E. Arenholz,3 J. Denlinger,3 E. E. Haller,1,2 and O. D. Dubon1,2
1Department of Materials Science and Engineering, University of California, Berkeley, CA 94720
2Lawrence Berkeley National Laboratory, Berkeley, CA 94720
3Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720
We have measured the X-ray absorption (XAS) 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 spectral shapes of the XAS 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. Finally, compensation with sulfur donors not only lowers the ferromagnetic Curie temperature but also reduces the spin polarization of the hole states. ©2007 American Institute of Physics
Permalink: http://link.aip.org/link/?APCPCS/893/1177/1
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KEYWORDS and PACS

Keywords
PACS
  • 75.50.Pp
    Magnetic semiconductors
  • 78.70.Dm
    X-ray absorption spectra (condensed matter)
  • 78.20.Ls
    Magnetooptical effects (bulk materials/thin films)
  • 72.25.Dc
    Spin polarized transport in semiconductors
  • YEAR: 2007

PUBLICATION DATA

ISSN:
0094-243X (print)  
Publisher:
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