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

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

2718

Lastpage

2720

Abstract

Magnetization of Ni₅₂Mn_24.4Ga_23.6 and Ni₅₂Mn_24.2Ga_23.8 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 T_I<T_M. We assume that T_I 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; Ni₅₂Mn_24.2Ga_23.8; Ni₅₂Mn_24.4Ga_23.6; 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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.951285

Filename

951285