Highly spin-polarized Co2MnGa0.5Sn0.5 Heusler compound

B. S.D.Ch S. Varaprasad; A. Rajanikanth; Y. K. Takahashi; K. Hono

doi:10.1016/j.actamat.2009.02.024

Highly spin-polarized Co₂MnGa_0.5Sn_0.5 Heusler compound

B. S.D.Ch S. Varaprasad, A. Rajanikanth, Y. K. Takahashi, K. Hono

Research output: Contribution to journal › Article › peer-review

48 Citations (Scopus)

Abstract

Point contact Andreev reflection measurements of Co₂MnSn_1-xGa_x alloys showed that the spin polarization of L2₁ ordered quaternary Co₂MnSn_0.5Ga_0.5 compound increased to 0.72 compared to 0.6 for Co₂MnSn and Co₂MnGa ternary alloys. The L2₁ Co₂MnSn_0.5Ga_0.5 phase was found to be an intermetallic compound, in which the L2₁ structure was stable up to the melting temperature. The increase in spin polarization was attributed to the high degree of L2₁ order as well as an increase in the spin-up density of states near the Fermi level.

Original language	English
Pages (from-to)	2702-2709
Number of pages	8
Journal	Acta Materialia
Volume	57
Issue number	9
DOIs	https://doi.org/10.1016/j.actamat.2009.02.024
Publication status	Published - 2009 May
Externally published	Yes

Keywords

Ferromagnet
Half-metal
Heusler alloy
Spin polarization

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

Access to Document

10.1016/j.actamat.2009.02.024

Cite this

@article{5de48a631d3446bdafd73cd8ba8dade2,

title = "Highly spin-polarized Co2MnGa0.5Sn0.5 Heusler compound",

abstract = "Point contact Andreev reflection measurements of Co2MnSn1-xGax alloys showed that the spin polarization of L21 ordered quaternary Co2MnSn0.5Ga0.5 compound increased to 0.72 compared to 0.6 for Co2MnSn and Co2MnGa ternary alloys. The L21 Co2MnSn0.5Ga0.5 phase was found to be an intermetallic compound, in which the L21 structure was stable up to the melting temperature. The increase in spin polarization was attributed to the high degree of L21 order as well as an increase in the spin-up density of states near the Fermi level.",

keywords = "Ferromagnet, Half-metal, Heusler alloy, Spin polarization",

author = "Varaprasad, {B. S.D.Ch S.} and A. Rajanikanth and Takahashi, {Y. K.} and K. Hono",

note = "Funding Information: B.S.D.Ch.S.V. and A.R. acknowledge the National Institute for Materials Science (NIMS) for the provision of a NIMS junior research assistantship and the ICYS fellowship, respectively. This work was in part supported by the Grant-in-Aid for Scientific Research on Priority Area on “Creation and Control of Spin Current” 19048029, PREST-JST, and the World Premier International Research Center (WPI) Initiative on Materials Nanoarchitronics, MEXT, Japan.",

year = "2009",

month = may,

doi = "10.1016/j.actamat.2009.02.024",

language = "English",

volume = "57",

pages = "2702--2709",

journal = "Acta Materialia",

issn = "1359-6454",

publisher = "Elsevier Limited",

number = "9",

}

TY - JOUR

T1 - Highly spin-polarized Co2MnGa0.5Sn0.5 Heusler compound

AU - Varaprasad, B. S.D.Ch S.

AU - Rajanikanth, A.

AU - Takahashi, Y. K.

AU - Hono, K.

N1 - Funding Information: B.S.D.Ch.S.V. and A.R. acknowledge the National Institute for Materials Science (NIMS) for the provision of a NIMS junior research assistantship and the ICYS fellowship, respectively. This work was in part supported by the Grant-in-Aid for Scientific Research on Priority Area on “Creation and Control of Spin Current” 19048029, PREST-JST, and the World Premier International Research Center (WPI) Initiative on Materials Nanoarchitronics, MEXT, Japan.

PY - 2009/5

Y1 - 2009/5

N2 - Point contact Andreev reflection measurements of Co2MnSn1-xGax alloys showed that the spin polarization of L21 ordered quaternary Co2MnSn0.5Ga0.5 compound increased to 0.72 compared to 0.6 for Co2MnSn and Co2MnGa ternary alloys. The L21 Co2MnSn0.5Ga0.5 phase was found to be an intermetallic compound, in which the L21 structure was stable up to the melting temperature. The increase in spin polarization was attributed to the high degree of L21 order as well as an increase in the spin-up density of states near the Fermi level.

AB - Point contact Andreev reflection measurements of Co2MnSn1-xGax alloys showed that the spin polarization of L21 ordered quaternary Co2MnSn0.5Ga0.5 compound increased to 0.72 compared to 0.6 for Co2MnSn and Co2MnGa ternary alloys. The L21 Co2MnSn0.5Ga0.5 phase was found to be an intermetallic compound, in which the L21 structure was stable up to the melting temperature. The increase in spin polarization was attributed to the high degree of L21 order as well as an increase in the spin-up density of states near the Fermi level.

KW - Ferromagnet

KW - Half-metal

KW - Heusler alloy

KW - Spin polarization

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U2 - 10.1016/j.actamat.2009.02.024

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EP - 2709

JO - Acta Materialia

JF - Acta Materialia

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