The Co2MnGe Heusler compound: A first principles study of the bulk phase and of the interface with GaAs

S. Picozzi, A. Continenza, Arthur J Freeman

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Within density functional theory, full-potential linearized augmented plane wave calculations have been performed to study the structural, electronic and magnetic properties of the Co2MnGe Heusler compound. As a result of the semiconducting (metallic) character found in the minority (majority) band structure, this material is predicted to be half-metallic, with an integer magnetic moment of 5 μB. This peculiar property, highly desired for spintronics applications, stimulated the study of the Co2 MnGe/GaAs interface. Our calculations show that the predicted band offset is not suitable for spin-injection and that, due to interface states, the half-metallicity is lost in proximity to the junction.

Original languageEnglish
Pages (from-to)2895-2897
Number of pages3
JournalIEEE Transactions on Magnetics
Volume38
Issue number5 I
DOIs
Publication statusPublished - Sep 2002

Keywords

  • Band offset
  • Half-metallic ferromagnet
  • Interface states

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

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