Mn L3,2 X-ray absorption spectroscopy and magnetic circular dichroism in ferromagnetic Ga1-xMnxP

P. R. Stone, M. A. Scarpulla, R. Farshchi, I. D. Sharp, J. W. Beeman, K. M. Yu, E. Arenholz, J. Denlinger, E. E. Haller, O. D. Dubon

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations

Abstract

We have measured the X-ray absorption (XAS) and X-ray magnetic circular dichroism (XMCD) at the Mn L32 edges in ferromagnetic Ga 1-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.

Original languageEnglish
Title of host publicationPhysics of Semiconductors - 28th International Conference on the Physics of Semiconductors, ICPS 2006, Part A and B
Pages1177-1178
Number of pages2
DOIs
StatePublished - 2007
Externally publishedYes
Event28th International Conference on the Physics of Semiconductors, ICPS 2006 - Vienna, Austria
Duration: 24 Jul 200628 Jul 2006

Publication series

NameAIP Conference Proceedings
Volume893
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference28th International Conference on the Physics of Semiconductors, ICPS 2006
Country/TerritoryAustria
CityVienna
Period24/07/0628/07/06

Keywords

  • Ferromagnetic semiconductors
  • Gallium manganese arsenide
  • Gallium manganese phosphide
  • X-ray magnetic circular dichroism (XMCD)

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