Bhatt, Ramesh Chandra and Meena, R. S. and Kishan, H. and Awana, V. P. S. and Agarwal, S. K. (2016) Structural, Magnetic, and Magnetocaloric Studies of Ni50Mn30Sn20 Shape Memory Alloy. Journal of Superconductivity and Novel Magnetism , 29 (12). pp. 3201-3206. ISSN 1557-1939

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We have synthesized a nominal composition of Ni50Mn30Sn20 alloy using arc melting technique. Rietveld refinement confirms the austenite L2(1) structure in the Fm-3m space group. Electrical resistivity has been found to be clearly exhibiting two different phenomena viz a magnetic transition from paramagnetic to ferromagnetic and a structural transition from austenite to martensite phase. Thermo-magnetization measurements M(T) confirms ferromagnetic transition temperature T (C) at 222 K and martensitic transition starting at 127 K (M-S). Magnetization measurement M(H) at 10 K confirms the ferromagnetic state. Frequency dependence of AC susceptibility chi' at low temperature suggests spin glass behavior in the system. The isothermal magnetic entropy change values have been found to be 1.14, 2.69, and 3.9 J/Kg.K, with refrigeration capacities of 19.6, 37.8, and 54.6 J/Kg for the field change of 1, 2, and 3 T respectively at 227 K.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s Springer Verlag.
Uncontrolled Keywords: X-ray diffraction Magnetic measurements Magnetocaloric Spin glasses
Subjects: Applied Physics/Condensed Matter
Depositing User: Dr. Rajpal Walke
Date Deposited: 20 Apr 2018 07:09
Last Modified: 20 Apr 2018 07:09

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