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

Fingerprint

Magnetoelectronics
Interface states
Magnetic moments
Electronic properties
Band structure
Density functional theory
Structural properties
Magnetic properties
minorities
integers
metallicity
proximity
plane waves
magnetic moments
injection
density functional theory
magnetic properties
electronics
gallium arsenide

Keywords

  • Band offset
  • Half-metallic ferromagnet
  • Interface states

ASJC Scopus subject areas

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

Cite this

The Co2MnGe Heusler compound : A first principles study of the bulk phase and of the interface with GaAs. / Picozzi, S.; Continenza, A.; Freeman, Arthur J.

In: IEEE Transactions on Magnetics, Vol. 38, No. 5 I, 09.2002, p. 2895-2897.

Research output: Contribution to journalArticle

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