Magnetocaloric properties of the Ni2Mn1−x(Cu,Co)xGa Heusler alloys

Abstract

We have investigated the magnetocaloric properties on the Ni2Mn1−xAxGa Heusler alloys with partial substitution of Mn by A=Co (x=0.10, 0.20, and 0.30) and Cu (x=0.15 and 0.20) in the vicinity of the martensitic transition by measuring magnetization curves at magnetic field up to 20kOe and in the temperature range of 250–300K. The changes of the magnetic part of entropy dependence on magnetic field and temperature have been evaluated.