Metals 2013, 3(1), 114-122; doi:10.3390/met3010114
Article

Magnetic Moment of Cu-Modified Ni2MnGa Magnetic Shape Memory Alloys

1 Research Institute for Engineering and Technology, Tohoku Gakuin University, Tagajo 985-8537, Japan 2 Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan 3 Faculty of Engineering, Tohoku Gakuin University, Tagajo 985-8537, Japan 4 Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan 5 Japan Science and Technology Agency-Precursory Research for Embryonic Science and Technology (JST-PREST), Tokyo 102-0076, Japan 6 Faculty of Science and Technology, Ryukoku University, Otsu 520-2194, Japan 7 Department of Basic Sciences, Faculty of Science and Engineering, Ishinomaki Senshu University, Ishinomaki 986-8580, Japan 8 Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan 9 Department of Physics, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, UK
* Author to whom correspondence should be addressed.
Received: 4 January 2013; in revised form: 24 January 2013 / Accepted: 25 January 2013 / Published: 4 February 2013
(This article belongs to the Special Issue Shape Memory Alloys)
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Abstract: The magnetization measurements at 5 K were carried out for Ni2Mn1 xCuxGa (0 ≤ x ≤ 0.40) and Ni2MnGa1 yCuy (0 ≤ y ≤ 0.25) alloys. All of the magnetization curves are characteristic of ferromagnetism or ferrimagnetism. By using Arrott plot analysis the spontaneous magnetization of all samples was determined from the magnetization curves. The magnetic moment per formula unit, μs, at 5 K was estimated from the spontaneous magnetization. For Ni2Mn1 xCuxGa (0 ≤ x ≤ 0.40) alloys μs at 5 K decreases linearly with increasing x. On the other hand, the μs at 5 K for Ni2MnGa1 yCuy (0 ≤ y ≤ 0.25) alloys decreases more steeply with increasing x compared to the μs for Ni2Mn1 xCuxGa (0 ≤ x ≤ 0.40) alloys. On the basis of the experimental results, the site-occupation configurations of Ni2Mn1 xCuxGa (0 ≤ x ≤ 0.40) and Ni2MnGa1 yCuy (0 ≤ y ≤ 0.25) alloys are proposed.
Keywords: magnetic shape memory alloy; Heusler alloy; Ni2MnGa; magnetic moment

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MDPI and ACS Style

Kanomata, T.; Endo, K.; Kudo, N.; Umetsu, R.Y.; Nishihara, H.; Kataoka, M.; Nagasako, M.; Kainuma, R.; Ziebeck, K.R. Magnetic Moment of Cu-Modified Ni2MnGa Magnetic Shape Memory Alloys. Metals 2013, 3, 114-122.

AMA Style

Kanomata T, Endo K, Kudo N, Umetsu RY, Nishihara H, Kataoka M, Nagasako M, Kainuma R, Ziebeck KR. Magnetic Moment of Cu-Modified Ni2MnGa Magnetic Shape Memory Alloys. Metals. 2013; 3(1):114-122.

Chicago/Turabian Style

Kanomata, Takeshi; Endo, Keita; Kudo, Naoto; Umetsu, Rie Y.; Nishihara, Hironori; Kataoka, Mitsuo; Nagasako, Makoto; Kainuma, Ryosuke; Ziebeck, Kurt R. 2013. "Magnetic Moment of Cu-Modified Ni2MnGa Magnetic Shape Memory Alloys." Metals 3, no. 1: 114-122.

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