Large field-induced magnetocaloric effect in Ni 43Mn 46 - XV xSn 11 heusler alloys

Abstract

The magnetocaloric effect of Ni 43Mn 46 - xV xSn 11 (x = 0.00, 0.75, 1.25, 1.50) alloys has been investigated. It is revealed that partial substitution of V for Mn dramatically enhances the magnetic entropy change from 15.4 J/kg.K for x=0 to 36.1 J/kg.K for x=1.25 under a magnetic field of 3 T. A large refrigeration capacity up to 164.2 J/kg for x=1.50 indicates that the V-doped Ni 4346Sn 11 alloys are promising candidates for the application in magnetic refrigeration. The origin of large magnetic entropy change and the variation of phase transformation temperature were discussed in terms of d electron density. © 2012 IEEE.