We predict the existence of a new ferromagnetic shape memory alloy Ga 2 MnNi using density functional theory. The martensitic start temperature (T M ) is found to be approximately proportional to the stabilization energy of the martensitic phase (δE tot ) for different shape memory alloys. Experimental studies performed to verify the theoretical results show that Ga 2 MnNi is ferromagnetic at room temperature and the T M and T C are 780 K and 330 K, respectively. Both from theory and experiment, the martensitic transition is found to be volume conserving that is indicative of shape memory behavior.
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