Magnetic properties of Co50-xNixMn 25Al25 alloys with B2 structure

A. Okubo; X. Xu; R. Y. Umetsu; T. Kanomata; K. Ishida; R. Kainuma

doi:10.1063/1.3559536

Magnetic properties of Co_50-xNi_xMn ₂₅Al₂₅ alloys with B2 structure

A. Okubo, X. Xu, R. Y. Umetsu, T. Kanomata, K. Ishida, R. Kainuma

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

4 Citations (Scopus)

Abstract

Magnetic properties of the B2 phase in Co_50-xNi _xMn₂₅Al₂₅ alloys were investigated. Spontaneous magnetization M_s measured at 4.2 K increases linearly with increasing x in the region of x ≤ 30 in accordance with following the generalized Slater-Pauling (GSP) line. However, M_s abruptly decreases with increasing x and deviates from the GSP line in the Ni-rich region of x > 30, suggesting a drastic change in the density of states at the Fermi energy. The Curie temperature T_C decreases monotonically with increasing x and significantly decreases in the region of x > 30. Antiferromagnetic evidence is clearly observed at x > 45, and the Néel temperature T_N increases with increasing x, in reaching the value of the B2 phase in Ni₂MnAl.

Original language	English
Article number	07B114
Journal	Journal of Applied Physics
Volume	109
Issue number	7
DOIs	https://doi.org/10.1063/1.3559536
Publication status	Published - 2011 Apr 1

ASJC Scopus subject areas

Physics and Astronomy(all)

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@article{871fa99a5c114be5a446ef144ecacc9e,

title = "Magnetic properties of Co50-xNixMn 25Al25 alloys with B2 structure",

abstract = "Magnetic properties of the B2 phase in Co50-xNi xMn25Al25 alloys were investigated. Spontaneous magnetization Ms measured at 4.2 K increases linearly with increasing x in the region of x ≤ 30 in accordance with following the generalized Slater-Pauling (GSP) line. However, Ms abruptly decreases with increasing x and deviates from the GSP line in the Ni-rich region of x > 30, suggesting a drastic change in the density of states at the Fermi energy. The Curie temperature TC decreases monotonically with increasing x and significantly decreases in the region of x > 30. Antiferromagnetic evidence is clearly observed at x > 45, and the N{\'e}el temperature TN increases with increasing x, in reaching the value of the B2 phase in Ni2MnAl.",

author = "A. Okubo and X. Xu and Umetsu, {R. Y.} and T. Kanomata and K. Ishida and R. Kainuma",

note = "Funding Information: This study was supported by Grants-in-Aid from the Japanese Society for the Promotion of Science (JSPS) and by the Global COE Program, Tohoku University, MEXT, Japan. Parts of this work were performed at the Center for Low Temperature Science, Institute for Materials Research, Tohoku University.",

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doi = "10.1063/1.3559536",

language = "English",

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T1 - Magnetic properties of Co50-xNixMn 25Al25 alloys with B2 structure

AU - Okubo, A.

AU - Xu, X.

AU - Umetsu, R. Y.

AU - Kanomata, T.

AU - Ishida, K.

AU - Kainuma, R.

N1 - Funding Information: This study was supported by Grants-in-Aid from the Japanese Society for the Promotion of Science (JSPS) and by the Global COE Program, Tohoku University, MEXT, Japan. Parts of this work were performed at the Center for Low Temperature Science, Institute for Materials Research, Tohoku University.

PY - 2011/4/1

Y1 - 2011/4/1

N2 - Magnetic properties of the B2 phase in Co50-xNi xMn25Al25 alloys were investigated. Spontaneous magnetization Ms measured at 4.2 K increases linearly with increasing x in the region of x ≤ 30 in accordance with following the generalized Slater-Pauling (GSP) line. However, Ms abruptly decreases with increasing x and deviates from the GSP line in the Ni-rich region of x > 30, suggesting a drastic change in the density of states at the Fermi energy. The Curie temperature TC decreases monotonically with increasing x and significantly decreases in the region of x > 30. Antiferromagnetic evidence is clearly observed at x > 45, and the Néel temperature TN increases with increasing x, in reaching the value of the B2 phase in Ni2MnAl.

AB - Magnetic properties of the B2 phase in Co50-xNi xMn25Al25 alloys were investigated. Spontaneous magnetization Ms measured at 4.2 K increases linearly with increasing x in the region of x ≤ 30 in accordance with following the generalized Slater-Pauling (GSP) line. However, Ms abruptly decreases with increasing x and deviates from the GSP line in the Ni-rich region of x > 30, suggesting a drastic change in the density of states at the Fermi energy. The Curie temperature TC decreases monotonically with increasing x and significantly decreases in the region of x > 30. Antiferromagnetic evidence is clearly observed at x > 45, and the Néel temperature TN increases with increasing x, in reaching the value of the B2 phase in Ni2MnAl.

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Magnetic properties of Co_50-xNi_xMn ₂₅Al₂₅ alloys with B2 structure

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