Abstract
Abstract Stoichiometric Ni 2 MnGa has a ferromagnetic and thermo-elastic martensitic transformation. Stoichiometric and non-stoichiometric Ni 2+ x Mn 1− x Ga ( x =0∼0.19) were made by the arc melting method and the martensitic and inverse martenistic transformation temperatues, M s , M f , A s and A f , were measured by a differential scanning calorimeter. The phase transformation temperature, T m , and the Curie temperature, T c , were determined by the low field magnetic susceptibility vs. temperature curves. The Curie temperatures, T c , decrease and the transformation temperatures, M s , M f , A s and T m ( A s ), increase with an increase of Ni composition.
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