Large magnetocaloric effect in spinel Cd Cr2 S4

Abstract

Magnetocaloric effect in Cd Cr2 S4 was investigated by magnetization and heat capacity measurements. Cd Cr2 S4 is of a cubic spinel structure with soft ferromagnetism and performs reversible magnetic entropy in the whole experimental temperature range from 56 to 128 K. A large magnetic entropy change ∼7.04 Jkg K and adiabatic temperature change Δ Tad ∼2.6 K are revealed for a field change of 0-5 T near the Curie temperature of 87 K. These results suggest that sulfospinel probably is a promising candidate as working material in magnetic refrigeration technology. © 2007 American Institute of Physics.