Is Heusler compound Co2CrAl a half-metallic ferromagnet: Electronic band structure, and transport properties

Ming Zhang; Zhuhong Liu; Haining Hu; Guodong Liu; Yuting Cui; Jinglan Chen; Guangheng Wu; Xixiang Zhang; Gang Xiao

doi:10.1016/j.jmmm.2003.10.017

Is Heusler compound Co₂CrAl a half-metallic ferromagnet: Electronic band structure, and transport properties

Ming Zhang^*, Zhuhong Liu, Haining Hu, Guodong Liu, Yuting Cui, Jinglan Chen, Guangheng Wu, Xixiang Zhang, Gang Xiao

^*Corresponding author for this work

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

72 Scopus citations

Abstract

We report the electronic band structure, and transport properties of the Heusler compound Co₂CrAl. The band structure calculation shows that Co₂CrAl is a true half-metallic ferromagnet with a magnetic moment of 3μ_B per formula, characterized by a full indirect band gap of 0.475eV at around the Fermi level in the minority-spin band. The electronic resistivity shows a power-law T^3.15 temperature dependence at low temperatures ascribed to the unconventional one-magnon scattering processes. A negative MR maximum of -0.33% is obtained for Co₂CrAl at 300K.

Original language	English (US)
Pages (from-to)	130-135
Number of pages	6
Journal	Journal of Magnetism and Magnetic Materials
Volume	277
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jmmm.2003.10.017
State	Published - Jun 2004
Externally published	Yes

Bibliographical note

Funding Information:
This work is supported by National Natural Science Foundation of China Grant No. 50201020 and 50271083. X.X. Zhang and G.H. Wu would like to thank the financial support from the Research Grants Council of the Hong Kong Special Administration Region, China (Project No. HKUST6059/02E).

Keywords

Band structure
Heusler alloy
Transport property

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2003.10.017

Cite this

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title = "Is Heusler compound Co2CrAl a half-metallic ferromagnet: Electronic band structure, and transport properties",

abstract = "We report the electronic band structure, and transport properties of the Heusler compound Co2CrAl. The band structure calculation shows that Co2CrAl is a true half-metallic ferromagnet with a magnetic moment of 3μB per formula, characterized by a full indirect band gap of 0.475eV at around the Fermi level in the minority-spin band. The electronic resistivity shows a power-law T3.15 temperature dependence at low temperatures ascribed to the unconventional one-magnon scattering processes. A negative MR maximum of -0.33% is obtained for Co2CrAl at 300K.",

keywords = "Band structure, Heusler alloy, Transport property",

author = "Ming Zhang and Zhuhong Liu and Haining Hu and Guodong Liu and Yuting Cui and Jinglan Chen and Guangheng Wu and Xixiang Zhang and Gang Xiao",

note = "Funding Information: This work is supported by National Natural Science Foundation of China Grant No. 50201020 and 50271083. X.X. Zhang and G.H. Wu would like to thank the financial support from the Research Grants Council of the Hong Kong Special Administration Region, China (Project No. HKUST6059/02E).",

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AU - Zhang, Ming

AU - Liu, Zhuhong

AU - Hu, Haining

AU - Liu, Guodong

AU - Cui, Yuting

AU - Chen, Jinglan

AU - Wu, Guangheng

AU - Zhang, Xixiang

AU - Xiao, Gang

N1 - Funding Information: This work is supported by National Natural Science Foundation of China Grant No. 50201020 and 50271083. X.X. Zhang and G.H. Wu would like to thank the financial support from the Research Grants Council of the Hong Kong Special Administration Region, China (Project No. HKUST6059/02E).

PY - 2004/6

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N2 - We report the electronic band structure, and transport properties of the Heusler compound Co2CrAl. The band structure calculation shows that Co2CrAl is a true half-metallic ferromagnet with a magnetic moment of 3μB per formula, characterized by a full indirect band gap of 0.475eV at around the Fermi level in the minority-spin band. The electronic resistivity shows a power-law T3.15 temperature dependence at low temperatures ascribed to the unconventional one-magnon scattering processes. A negative MR maximum of -0.33% is obtained for Co2CrAl at 300K.

AB - We report the electronic band structure, and transport properties of the Heusler compound Co2CrAl. The band structure calculation shows that Co2CrAl is a true half-metallic ferromagnet with a magnetic moment of 3μB per formula, characterized by a full indirect band gap of 0.475eV at around the Fermi level in the minority-spin band. The electronic resistivity shows a power-law T3.15 temperature dependence at low temperatures ascribed to the unconventional one-magnon scattering processes. A negative MR maximum of -0.33% is obtained for Co2CrAl at 300K.

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KW - Heusler alloy

KW - Transport property

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