The effects of alloying element Co on Ni-Mn-Ga ferromagnetic shape memory alloys from first-principles calculations

Jing Bai; Raulot, Jean-Marc; Yudong Zhang; Esling, Claude; Xiang Zhao; Liang Zuo
April 2011
Applied Physics Letters;4/18/2011, Vol. 98 Issue 16, p164103
Academic Journal
The effects of Co addition on the properties of Ni8-xMn4Ga4Cox ferromagnetic shape memory alloys are systematically investigated by first-principles calculations. The formation energy results indicate that the added Co preferentially occupies the Ni sites in Ni2MnGa alloy. The total energy difference between the paramagnetic and the ferromagnetic austenite plays an important role on the Curie transformation. The electronic density of states gives rise to the difference in the magnetic properties.


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