Surface treatments and magnetic properties of Ga1-xMnxAs thin films

F. Maccherozzi, G. Panaccione, G. Rossi, M. Hochstrasser, M. Sperl, M. Reinwald, G. Woltersdorf, W. Wegscheider, C. H. Back

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

As a diluted magnetic semiconductor (DMS), (Ga,Mn)As is a possible candidate for the realization of spintronics devices, due to its intrinsic compatibility with GaAs based electronics. The low Curie temperature still limits its use for practical devices. Despite the huge knowledge on GaAs surface, the (Ga,Mn)As surface is still not well understood and difficult to handle. Standard surface cleaning techniques have many drawbacks, mainly because thermal treatments changes crystal structure. We will compare the magnetic and spectroscopic properties of differently processed (Ga,Mn)As surfaces with X-ray photoemission (XPS), X-ray absorption (XAS) and X-ray magnetic circular dichroism (XMCD). Samples as-grown, chemically etched, Ar+ sputtered and annealed in oxygen will be compared.

Original languageEnglish
Pages (from-to)4283-4287
Number of pages5
JournalSurface Science
Volume601
Issue number18
DOIs
StatePublished - 15 Sep 2007
Externally publishedYes

Keywords

  • (Ga,Mn)As
  • Magnetic interfaces
  • X-ray absorption spectroscopy
  • X-ray photoelectron spectroscopy

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