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

S. Picozzi; A. Continenza; A. J. Freeman

doi:10.1109/TMAG.2002.803142

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

S. Picozzi^*, A. Continenza, A. J. Freeman

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Conference article › peer-review

13 Scopus citations

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 μ_B. 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 language	English (US)
Pages (from-to)	2895-2897
Number of pages	3
Journal	Ieee Transactions on Magnetics
Volume	38
Issue number	5 I
DOIs	https://doi.org/10.1109/TMAG.2002.803142
State	Published - Sep 2002
Event	2002 International Magnetics Conference (Intermag 2002) - Amsterdam, Netherlands Duration: Apr 28 2002 → May 2 2002

Keywords

Band offset
Half-metallic ferromagnet
Interface states

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/TMAG.2002.803142

Cite this

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

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.",

keywords = "Band offset, Half-metallic ferromagnet, Interface states",

author = "S. Picozzi and A. Continenza and Freeman, {A. J.}",

year = "2002",

month = sep,

doi = "10.1109/TMAG.2002.803142",

language = "English (US)",

volume = "38",

pages = "2895--2897",

journal = "Ieee Transactions on Magnetics",

issn = "0018-9464",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "5 I",

note = "2002 International Magnetics Conference (Intermag 2002) ; Conference date: 28-04-2002 Through 02-05-2002",

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TY - JOUR

T1 - The Co2MnGe Heusler compound

T2 - 2002 International Magnetics Conference (Intermag 2002)

AU - Picozzi, S.

AU - Continenza, A.

AU - Freeman, A. J.

PY - 2002/9

Y1 - 2002/9

N2 - 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.

AB - 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.

KW - Band offset

KW - Half-metallic ferromagnet

KW - Interface states

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