Title :
Magnetization and magnetocaloric effect in magnetic shape memory alloys Ni-Mn-Ga
Author :
Pakhomov, A.B. ; Wong, C.Y. ; Zhang, X.X. ; Wen, G.H. ; Wu, G.H.
Author_Institution :
Magnetics Innovation Center, Hong Kong Univ. of Sci. & Technol., Kowloon, China
fDate :
7/1/2001 12:00:00 AM
Abstract :
Magnetization of Ni52Mn24.4Ga23.6 and Ni52Mn24.2Ga23.8 magnetic shape memory alloys was measured as a function of magnetic field up to 50 kOe at temperatures in the range 160-390 K. Anomalies of magnetic properties were observed not only at the temperature of martensitic transition T M, but also at a second transition temperature TI<TM. We assume that TI is associated with an intermartensitic transformation
Keywords :
ferromagnetic materials; gallium alloys; magnetic anisotropy; magnetisation; magnetocaloric effects; magnetoelastic effects; manganese alloys; martensitic transformations; nickel alloys; shape memory effects; 160 to 390 K; Ni-Mn-Ga; Ni52Mn24.2Ga23.8; Ni52Mn24.4Ga23.6; intermartensitic transformation; magnetic shape memory alloys; magnetization; magnetocaloric effect; martensitic transition; second transition temperature; Magnetic anisotropy; Magnetic domains; Magnetic field induced strain; Magnetic field measurement; Magnetic materials; Magnetization; Magnetostriction; Perpendicular magnetic anisotropy; Shape memory alloys; Temperature distribution;
Journal_Title :
Magnetics, IEEE Transactions on
