Magnetic Moment of Cu-Modified Ni2MnGa Magnetic Shape Memory Alloys

作者：Kanomata Takeshi; Endo Keita; Kudo Naoto; Umetsu Rie Y^*; Nishihara Hironori; Kataoka Mitsuo; Nagasako Makoto; Kainuma Ryosuke; Ziebeck Kurt R A

来源：Metals, 2013, 3(1): 114-122.

DOI：10.3390/met3010114

• magnetic shape memory alloy
• Heusler alloy
• Ni2MnGa
• magnetic moment

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, mu(s), at 5 K was estimated from the spontaneous magnetization. For Ni2Mn1 - xCuxGa (0 <= x <= 0.40) alloys mu(s) at 5 K decreases linearly with increasing x. On the other hand, the mu(s) at 5 K for Ni2MnGa1 - yCuy (0 <= y <= 0.25) alloys decreases more steeply with increasing x compared to the mu(s) 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.

• 出版日期2013-3