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Metals 2013, 3(2), 202-224; doi:10.3390/met3020202
Review

Magneto-Structural Properties of Ni2MnGa Ferromagnetic Shape Memory Alloy in Magnetic Fields

1,* , 2
 and 3,4
Received: 8 March 2013; in revised form: 24 April 2013 / Accepted: 10 May 2013 / Published: 23 May 2013
(This article belongs to the Special Issue Shape Memory Alloys)
View Full-Text   |   Download PDF [707 KB, uploaded 23 May 2013]
Abstract: The purpose of this review was to investigate the correlation between magnetism and crystallographic structures as it relates to the martensite transformation of Ni2MnGa 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) TM and the martensite to austenite transformation temperature (reverse martensite temperature) TR of Fe, Cu, or Co-doped Ni–Mn–Ga ferromagnetic shape memory alloys increase when compared to Ni2MnGa. These alloys show large field dependence of the martensite transformation temperature. The field dependence of the martensite transformation temperature, dTM/dB, is −4.2 K/T in Ni41Co9Mn32Ga18. The results of linear thermal strain and magnetization indicate that a magneto-structural transition occurred at TM and magnetic field influences the magnetism and also the crystal structures. Magnetocrystalline anisotropy was also determined and compared with other components of Ni2MnGa type shape memory alloys. In the last section, magnetic field-induced strain and magnetostriction was determined with some novel alloys.
Keywords: ferromagnetic shape memory alloys; magnetocrystalline anisotropy; thermal strain; magnetic field-induced strain; magnetostriction ferromagnetic shape memory alloys; magnetocrystalline anisotropy; thermal strain; magnetic field-induced strain; magnetostriction
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Sakon, T.; Adachi, Y.; Kanomata, T. Magneto-Structural Properties of Ni2MnGa Ferromagnetic Shape Memory Alloy in Magnetic Fields. Metals 2013, 3, 202-224.

AMA Style

Sakon T, Adachi Y, Kanomata T. Magneto-Structural Properties of Ni2MnGa Ferromagnetic Shape Memory Alloy in Magnetic Fields. Metals. 2013; 3(2):202-224.

Chicago/Turabian Style

Sakon, Takuo; Adachi, Yoshiya; Kanomata, Takeshi. 2013. "Magneto-Structural Properties of Ni2MnGa Ferromagnetic Shape Memory Alloy in Magnetic Fields." Metals 3, no. 2: 202-224.


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