Magnetization process near the Curie temperature of a ferromagnetic Heusler alloy Co 2VGa

H. Nishihara; Y. Furutani; T. Wada; T. Kanomata; K. Kobayashi; R. Kainuma; K. Ishida; T. Yamauchi

doi:10.1007/s10948-010-0933-3

Magnetization process near the Curie temperature of a ferromagnetic Heusler alloy Co ₂VGa

H. Nishihara, Y. Furutani, T. Wada, T. Kanomata, K. Kobayashi, R. Kainuma, K. Ishida, T. Yamauchi

ENG - Metallurgy

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

14 Citations (Scopus)

Abstract

The field dependence of the magnetization of a ferromagnetic Heusler alloy Co ₂VGa has been measured close to the Curie temperature of 358 K up to an applied field of 50 kOe. Results for samples with different Curie temperatures of 351 K are also reported. The critical exponent δ has been determined to be 4.15 (0.05) for both samples. The value is different from either 5 predicted by the spin fluctuation theory by Takahashi or 3 derived by a conventional molecular field theory. Possible origins for the discrepancy from the theories are discussed.

Original language	English
Pages (from-to)	679-681
Number of pages	3
Journal	Journal of Superconductivity and Novel Magnetism
Volume	24
Issue number	1-2
DOIs	https://doi.org/10.1007/s10948-010-0933-3
Publication status	Published - 2011 Jan

Keywords

Co VGa
Curie temperature
Ferromagnet
Heusler alloy
Magnetization process

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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@article{a33a753b0ab740c39e4ef64ba3eb7d14,

title = "Magnetization process near the Curie temperature of a ferromagnetic Heusler alloy Co 2VGa",

abstract = "The field dependence of the magnetization of a ferromagnetic Heusler alloy Co 2VGa has been measured close to the Curie temperature of 358 K up to an applied field of 50 kOe. Results for samples with different Curie temperatures of 351 K are also reported. The critical exponent δ has been determined to be 4.15 (0.05) for both samples. The value is different from either 5 predicted by the spin fluctuation theory by Takahashi or 3 derived by a conventional molecular field theory. Possible origins for the discrepancy from the theories are discussed.",

keywords = "Co VGa, Curie temperature, Ferromagnet, Heusler alloy, Magnetization process",

author = "H. Nishihara and Y. Furutani and T. Wada and T. Kanomata and K. Kobayashi and R. Kainuma and K. Ishida and T. Yamauchi",

note = "Funding Information: Acknowledgements We thank Professor Y. Takahashi for helpful discussions. This work was partially supported by a grant based on the High-Tech Research Center Program for private universities from the Japan Ministry of Education, Culture, Sports, Science, and Technology. This work was also supported in part by a special program for a cooperative research at Institute for Solid State Physics, University of Tokyo.",

year = "2011",

month = jan,

doi = "10.1007/s10948-010-0933-3",

language = "English",

volume = "24",

pages = "679--681",

journal = "Journal of Superconductivity and Novel Magnetism",

issn = "1557-1939",

publisher = "Springer New York",

number = "1-2",

}

TY - JOUR

T1 - Magnetization process near the Curie temperature of a ferromagnetic Heusler alloy Co 2VGa

AU - Nishihara, H.

AU - Furutani, Y.

AU - Wada, T.

AU - Kanomata, T.

AU - Kobayashi, K.

AU - Kainuma, R.

AU - Ishida, K.

AU - Yamauchi, T.

N1 - Funding Information: Acknowledgements We thank Professor Y. Takahashi for helpful discussions. This work was partially supported by a grant based on the High-Tech Research Center Program for private universities from the Japan Ministry of Education, Culture, Sports, Science, and Technology. This work was also supported in part by a special program for a cooperative research at Institute for Solid State Physics, University of Tokyo.

PY - 2011/1

Y1 - 2011/1

N2 - The field dependence of the magnetization of a ferromagnetic Heusler alloy Co 2VGa has been measured close to the Curie temperature of 358 K up to an applied field of 50 kOe. Results for samples with different Curie temperatures of 351 K are also reported. The critical exponent δ has been determined to be 4.15 (0.05) for both samples. The value is different from either 5 predicted by the spin fluctuation theory by Takahashi or 3 derived by a conventional molecular field theory. Possible origins for the discrepancy from the theories are discussed.

AB - The field dependence of the magnetization of a ferromagnetic Heusler alloy Co 2VGa has been measured close to the Curie temperature of 358 K up to an applied field of 50 kOe. Results for samples with different Curie temperatures of 351 K are also reported. The critical exponent δ has been determined to be 4.15 (0.05) for both samples. The value is different from either 5 predicted by the spin fluctuation theory by Takahashi or 3 derived by a conventional molecular field theory. Possible origins for the discrepancy from the theories are discussed.

KW - Co VGa

KW - Curie temperature

KW - Ferromagnet

KW - Heusler alloy

KW - Magnetization process

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DO - 10.1007/s10948-010-0933-3

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VL - 24

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EP - 681

JO - Journal of Superconductivity and Novel Magnetism

JF - Journal of Superconductivity and Novel Magnetism

SN - 1557-1939

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