Magnetic properties of Ni-Mn-Fe-Ga ferromagnetic shape memory alloys

Issue title: INABIO 2006

Article type: Research Article

Authors: Kanomata, Takeshi^{a; *} | Murakami, Shuichi^a | Kikuchi, Daisuke^a | Nashima, Osamu^a | Nishihara, Hironori^b

Affiliations: [a] Faculty of Engineering, Tohoku Gakuin University, Tagajo 985-8537, Japan | [b] Faculty of Science and Technology, Ryukoku University, Otsu 520-2194, Japan

Correspondence: [*] Corresponding author. Tel.: +81 22 368 7249; Fax: +81 22 368 7070; E-mail: kanomata@tjcc.tohoku-gakuin.ac.jp

Abstract: The magnetic measurements on Ni_{50}(Mn_{0.5}Fe_{0.5})_{25+x}Ga_{25-x}(0 � x � 5.0) ferromagnetic shape memory alloys are made in the temperature range between 4.5 K and 500 K. A phase diagram of Ni_{50}(Mn_{0.5}Fe_{0.5})_{25+x}Ga_{25-x} is determined from the results of the temperature dependence of the initial permeability. The Curie temperature T_C exhibits only mild dependence when the concentration x increases. The martensitic and reverse martensitic transformation temperatures, T_M and T_R, increase with x. The total moment per formula unit μ_{m} remains constant with x.

Keywords: Ferromagnetic shape memory alloys, martensitic transformation, phase diagram, magnetic moment

DOI: 10.3233/JAE-2008-929

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 27, no. 3, pp. 215-224, 2008