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Molecular beam epitaxy growth and magnetic properties of Cr-Co-Ga Heusler alloy films

AIP Advances, ISSN: 2158-3226, Vol: 5, Issue: 11
2015
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Metrics Details

  • Citations
    4
    • Citation Indexes
      4
  • Captures
    10

Article Description

We have re-investigated growth and magnetic properties of CrCoGa films using molecular beam epitaxy technique. Phase separation and precipitate formation were observed experimentally again in agreement with observation of multiple phases separation in sputtered CrCoGa films by M. Meinert et al. However, significant phase separation could be suppressed by proper control of growth conditions. We showed that CrCoGa Heusler phase, rather than CoCrGa phase, constitutes the majority of the sample grown on GaAs(001) at 450 C. The measured small spin moment of CrCoGa is in agreement with predicted HM-FCF nature; however, its Curie temperature is not as high as expected from the theoretical prediction probably due to the off-stoichiometry of CrCoGa and the existence of the disorders and phase separation.

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