Direct and Inverse Magnetocaloric Effect in Ni_(1.81)Mn_(1.64)In_(0.55) Multifunctional Heusler Alloy

摘要

The magnetocaloric effect (MCE) in Ni_(1.81)Mn_(1.64)In_(0.55) Heusler alloy has been measured by the direct method. The field dependences of the magnetization were obtained. The phase transition temperatures were determined. The maximal adiabatic temperature change ?T_(ad) near the Curie temperature is 1.8 K under the magnetic field change AH = 18 kOe. The inverse MCE(?T_(ad)= -3.72 K) in the same field change takes place near the temperature of martensitic transformation.