Magnetocaloric effect in single-crystalline Nd1−xSrxMnO3 (x=0.3, 0.5)

Abstract An investigation of the magnetocaloric effect (MCE) of single-crystalline Nd 1− x Sr x MnO 3 ( x =0.3, 0.5) is presented. A large change in magnetic entropy (Δ S ) is observed in anti-ferromagnet (AFM) charge-ordering compound Nd 0.5 Sr 0.5 MnO 3 in a relatively low field of 1.4 T around the Neel temperature of 150 K. On the other hand, Nd 0.7 Sr 0.3 MnO 3 , which is a ferromagnetic (FM) metal, shows an entropy change of 3.82 J/kg K and a broad temperature dependence of adiabatic temperature change (Δ T ad ) over 20 K in the same low-field range around the Curie temperature ( T C =203 K). Mechanism involved in the large MCE in these compounds is discussed.