Magnetic properties and phase stability of L 21 phase in Co 2 Mn (Ga1-x Zx) (Z=Si, Ge, and Sn) Heusler alloys

A. Okubo; R. Y. Umetsu; K. Kobayashi; R. Kainuma; K. Ishida

doi:10.1063/1.3427431

Magnetic properties and phase stability of L 2₁ phase in Co ₂ Mn (Ga_1-x Z_x) (Z=Si, Ge, and Sn) Heusler alloys

A. Okubo, R. Y. Umetsu, K. Kobayashi, R. Kainuma, K. Ishida

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

19 Citations (Scopus)

Abstract

For the Co₂ Mn (Ga_1-x Z_x) (Z=Si, Ge, and Sn) Heusler alloys, the L 2₁ /B2 order-disorder transition temperature T_t L 2₁/B2 the Curie temperature T _C, and the saturation magnetization M_s were determined. The T_t L 2₁/B2 for all the systems linearly increases with increasing x. Although the T_t L 2₁/B2 was not determined in the high x region because of melting of alloys, those of Co₂ MnGe and Co₂ MnSn could be estimated by extrapolation from the quaternary data. The M_s at 4.2 K and the T_C increase with x, and the M_s for all the systems is in good agreement with the Slater Pauling rule.

Original language	English
Article number	222507
Journal	Applied Physics Letters
Volume	96
Issue number	22
DOIs	https://doi.org/10.1063/1.3427431
Publication status	Published - 2010 May 31

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Magnetic properties and phase stability of L 21 phase in Co 2 Mn (Ga1-x Zx) (Z=Si, Ge, and Sn) Heusler alloys",

abstract = "For the Co2 Mn (Ga1-x Zx) (Z=Si, Ge, and Sn) Heusler alloys, the L 21 /B2 order-disorder transition temperature Tt L 21/B2 the Curie temperature T C, and the saturation magnetization Ms were determined. The Tt L 21/B2 for all the systems linearly increases with increasing x. Although the Tt L 21/B2 was not determined in the high x region because of melting of alloys, those of Co2 MnGe and Co2 MnSn could be estimated by extrapolation from the quaternary data. The Ms at 4.2 K and the TC increase with x, and the Ms for all the systems is in good agreement with the Slater Pauling rule.",

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

note = "Funding Information: This work was supported by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (JSPS) and by funds from the Global Center of Excellence (GCOE) project. A part of this work was carried out at the Center for Low Temperature Science, Institute for Materials Research, Tohoku University. ",

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T1 - Magnetic properties and phase stability of L 21 phase in Co 2 Mn (Ga1-x Zx) (Z=Si, Ge, and Sn) Heusler alloys

AU - Okubo, A.

AU - Umetsu, R. Y.

AU - Kobayashi, K.

AU - Kainuma, R.

AU - Ishida, K.

N1 - Funding Information: This work was supported by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (JSPS) and by funds from the Global Center of Excellence (GCOE) project. A part of this work was carried out at the Center for Low Temperature Science, Institute for Materials Research, Tohoku University.

PY - 2010/5/31

Y1 - 2010/5/31

N2 - For the Co2 Mn (Ga1-x Zx) (Z=Si, Ge, and Sn) Heusler alloys, the L 21 /B2 order-disorder transition temperature Tt L 21/B2 the Curie temperature T C, and the saturation magnetization Ms were determined. The Tt L 21/B2 for all the systems linearly increases with increasing x. Although the Tt L 21/B2 was not determined in the high x region because of melting of alloys, those of Co2 MnGe and Co2 MnSn could be estimated by extrapolation from the quaternary data. The Ms at 4.2 K and the TC increase with x, and the Ms for all the systems is in good agreement with the Slater Pauling rule.

AB - For the Co2 Mn (Ga1-x Zx) (Z=Si, Ge, and Sn) Heusler alloys, the L 21 /B2 order-disorder transition temperature Tt L 21/B2 the Curie temperature T C, and the saturation magnetization Ms were determined. The Tt L 21/B2 for all the systems linearly increases with increasing x. Although the Tt L 21/B2 was not determined in the high x region because of melting of alloys, those of Co2 MnGe and Co2 MnSn could be estimated by extrapolation from the quaternary data. The Ms at 4.2 K and the TC increase with x, and the Ms for all the systems is in good agreement with the Slater Pauling rule.

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Magnetic properties and phase stability of L 2₁ phase in Co ₂ Mn (Ga_1-x Z_x) (Z=Si, Ge, and Sn) Heusler alloys

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