Magnetic properties and band structures of half-metal-type Co 2CrGa Heusler alloy

R. Y. Umetsu; K. Kobayashi; R. Kainuma; A. Fujita; K. Fukamichi; K. Ishida; A. Sakuma

doi:10.1063/1.1790029

Magnetic properties and band structures of half-metal-type Co ₂CrGa Heusler alloy

R. Y. Umetsu, K. Kobayashi, R. Kainuma, A. Fujita, K. Fukamichi, K. Ishida, A. Sakuma

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Abstract

The saturation magnetic moment M _s and the Curie temperature T _C of the half-metal-type Co ₂CrGa Heusler alloy were analyzed. It was observed that the value of M _s at 4.2 K for the L2 ₁-type Co ₂CrGa alloy is 3.01 μ _B/f.u. It was shown that the T _C and the phase-transformation temperature T _t from the L2 ₁ to B2-type structure are 495 and 1050 K, respectively. It was found that the band calculations disclose that the spin polarization is also relatively high in the B2-type structure, although its estimated T _C is about 100 K lower than that of the L2 ₁-type structure.

Original language	English
Pages (from-to)	2011-2013
Number of pages	3
Journal	Applied Physics Letters
Volume	85
Issue number	11
DOIs	https://doi.org/10.1063/1.1790029
Publication status	Published - 2004 Sep 13

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Magnetic properties and band structures of half-metal-type Co 2CrGa Heusler alloy",

abstract = "The saturation magnetic moment M s and the Curie temperature T C of the half-metal-type Co 2CrGa Heusler alloy were analyzed. It was observed that the value of M s at 4.2 K for the L2 1-type Co 2CrGa alloy is 3.01 μ B/f.u. It was shown that the T C and the phase-transformation temperature T t from the L2 1 to B2-type structure are 495 and 1050 K, respectively. It was found that the band calculations disclose that the spin polarization is also relatively high in the B2-type structure, although its estimated T C is about 100 K lower than that of the L2 1-type structure.",

author = "Umetsu, {R. Y.} and K. Kobayashi and R. Kainuma and A. Fujita and K. Fukamichi and K. Ishida and A. Sakuma",

note = "Funding Information: The authors are very grateful to Professor K. Inomata and Dr. K. Ishikawa for their valuable discussions. One of the authors (R. Y. Umetsu) has been supported by the Research Fellowships of the Japan Society for the Promotion of Science for Young Scientists. Copyright: Copyright 2012 Elsevier B.V., All rights reserved.",

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doi = "10.1063/1.1790029",

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T1 - Magnetic properties and band structures of half-metal-type Co 2CrGa Heusler alloy

AU - Umetsu, R. Y.

AU - Kobayashi, K.

AU - Kainuma, R.

AU - Fujita, A.

AU - Fukamichi, K.

AU - Ishida, K.

AU - Sakuma, A.

N1 - Funding Information: The authors are very grateful to Professor K. Inomata and Dr. K. Ishikawa for their valuable discussions. One of the authors (R. Y. Umetsu) has been supported by the Research Fellowships of the Japan Society for the Promotion of Science for Young Scientists. Copyright: Copyright 2012 Elsevier B.V., All rights reserved.

PY - 2004/9/13

Y1 - 2004/9/13

N2 - The saturation magnetic moment M s and the Curie temperature T C of the half-metal-type Co 2CrGa Heusler alloy were analyzed. It was observed that the value of M s at 4.2 K for the L2 1-type Co 2CrGa alloy is 3.01 μ B/f.u. It was shown that the T C and the phase-transformation temperature T t from the L2 1 to B2-type structure are 495 and 1050 K, respectively. It was found that the band calculations disclose that the spin polarization is also relatively high in the B2-type structure, although its estimated T C is about 100 K lower than that of the L2 1-type structure.

AB - The saturation magnetic moment M s and the Curie temperature T C of the half-metal-type Co 2CrGa Heusler alloy were analyzed. It was observed that the value of M s at 4.2 K for the L2 1-type Co 2CrGa alloy is 3.01 μ B/f.u. It was shown that the T C and the phase-transformation temperature T t from the L2 1 to B2-type structure are 495 and 1050 K, respectively. It was found that the band calculations disclose that the spin polarization is also relatively high in the B2-type structure, although its estimated T C is about 100 K lower than that of the L2 1-type structure.

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JF - Applied Physics Letters

SN - 0003-6951

IS - 11

ER -

Magnetic properties and band structures of half-metal-type Co ₂CrGa Heusler alloy

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