We have studied the effect of magnetic field on a nonstoichiometric Heusler alloy Ni50Mn35In15 that undergoes a martensitic as well as a magnetic transition near room temperature. Temperature dependent magnetization measurements demonstrate the influence of magnetic field on the structural phase transition temperature. From the study of magnetization as a function of applied field, we show the occurrence of inverse-magnetocaloric effect associated with this magneto-structural transition. The magnetic entropy change attains a value as high as 25J∕kgK (at 5T field) at room temperature as the alloy transforms from the austenitic to martensitic phase with a concomitant magnetic ordering.
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Bhobe et al. (2007) studied this question.
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