%0 Journal Article
%T Magneto-Structural Properties of Ni2MnGa Ferromagnetic Shape Memory Alloy in Magnetic Fields
%A Takuo Sakon
%A Yoshiya Adachi
%A Takeshi Kanomata
%J Metals
%D 2013
%I MDPI AG
%R 10.3390/met3020202
%X The purpose of this review was to investigate the correlation between magnetism and crystallographic structures as it relates to the martensite transformation of Ni 2MnGa type alloys, which undergo martensite transformation below the Curie temperature. In particular, this paper focused on the physical properties in magnetic fields. Recent researches show that the martensite starting temperature (martensite transformation temperature) T M and the martensite to austenite transformation temperature (reverse martensite temperature) T R of Fe, Cu, or Co-doped Ni¨CMn¨CGa ferromagnetic shape memory alloys increase when compared to Ni 2MnGa. These alloys show large field dependence of the martensite transformation temperature. The field dependence of the martensite transformation temperature, dT M /dB, is £¿4.2 K/T in Ni 41Co 9Mn 32Ga 18. The results of linear thermal strain and magnetization indicate that a magneto-structural transition occurred at T M and magnetic field influences the magnetism and also the crystal structures. Magnetocrystalline anisotropy was also determined and compared with other components of Ni 2MnGa type shape memory alloys. In the last section, magnetic field-induced strain and magnetostriction was determined with some novel alloys.
%K ferromagnetic shape memory alloys
%K magnetocrystalline anisotropy
%K thermal strain
%K magnetic field-induced strain
%K magnetostriction
%U http://www.mdpi.com/2075-4701/3/2/202