Martensitic transformation in Cu-doped NiMnGa magnetic shape memory alloys

doi:10.1088/1674-1056/20/2/028104

Abstract This paper studies the martensitic transformation in the Cu-doped NiMnGa alloys. The orthorhombic martensite transforms to L2₁ cubic austenite by Cu substituting for Ni in the Ni_50-xCu_xMn₃₁Ga₁₉ (x=2-10) alloys, the martensitic transformation temperature decreases significantly with the rate of 40 K per Cu atom addition. The variation of the Fermi sphere radius (k_F) is applied to evaluate the change of the martensitic transformation temperature. The increase of k_F leads to the increase of the martensitic transformation temperature.

Keywords: shape memory alloys martensitic phase transformation NiCuMnGa

Received: 20 August 2010
Revised: 09 September 2010
Accepted manuscript online:

PACS:	81.30.Kf	(Martensitic transformations)
	61.66.Dk	(Alloys )

Fund: Project supported by the National Natural Science Foundation for Distinguished Young Scholars of China (Grant No. 50925101), Science Fund for Creative Research Groups of the National Natural Science Foundation of China (Grant No. 50921003) and the Fundamental Research Funds for the Central Universities.

Cite this article:

Li Pan-Pan(李盼盼), Wang Jing-Min(王敬民), and Jiang Cheng-Bao(蒋成保) Martensitic transformation in Cu-doped NiMnGa magnetic shape memory alloys 2011 Chin. Phys. B 20 028104

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