Enhanced magnetocaloric properties in annealed Heusler Ni-Mn-Sn ribbons

Document Type

Article

Publication Date

1-15-2015

Abstract

In the present study, annealing effects on the magnetostructural transitions and magnetic properties were investigated based on Heusler Ni 49Mn39Sn12 ribbons. Experimental results show that a larger magnetic entropy change is obtained in case of the ribbons annealed at 973 K. The enhancement was explained from the atomic order, thermal hysteresis and sub-grain microstructure. It is proposed that effective annealing occurs around the L21?B2 ordering transition temperature for Heusler Ni-Mn based ribbons. © 2014 Elsevier B.V.

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