Structural, Thermal and Magnetic Properties of Ga Excess Ni-Mn-Ga

Singh, Sanjay and Bhardwaj, S and Panda, A K and Ahire, V and Mitra, A and Awasthi, A M and Barman, S R (2010) Structural, Thermal and Magnetic Properties of Ga Excess Ni-Mn-Ga. Materials Science Forum, 635 . pp. 43-47.

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The martensitic transition and the ferro- to paramagnetic transition have been studied in a series of Ga excess Ni-Mn-Ga specimens [Ni2-xMnGa1+x (0.4≤ x≤ 0.9)] by differential scanning calorimetry and magnetization measurements. The martensitic transition exhibits a hysteresis whose width is similar to Ni2MnGa, indicating that the transition is thermoelastic. The latent heat of transformation is comparable with other Ni-Mn-Ga alloys. A substantial increase in the martensitic transition temperature is observed due to Ga doping. Interestingly, the x-ray diffraction pattern of all the compositions studied show a modulated martensitic structure in the martensitic phase.

Item Type:Article
Official URL/DOI:doi:10.4028/
Uncontrolled Keywords:Ferromagnetic shape memory alloys, x-ray diffraction, martensitic transition.
Divisions:Material Science and Technology
ID Code:3526
Deposited By:Dr. A K Sahu
Deposited On:19 Jul 2011 15:17
Last Modified:09 Feb 2012 13:02
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