The Inverse Magnetocaloric Effect of MgB2 Superconductor

The magnetocaloric effect-(MCE) of MgB 2 is simulated, considering the effect of sintering temperature on MCE. The results show that MCE of MgB 2 samples is an inverse type in a temperature range of diamagnetic-paramagnetic transition. Moreover, the MCE for MgB 2 is improved with high sintering temperature. The comparison between MCE of MgB 2 samples and other some reported magnetic materials has been done, showing that MCE parameters of MgB 2 samples are larger than some MCE parameters of La 1-x Cd x MnO 3 , La 1.25 Sr 0.75 MnCoO 6 , Gd 1−x Ca x BaCo 2 O 5.5 , Ni 58 Fe 26 Ga 28 , Ni 2+x Mn 1−x Ge, Ge 0.95 Mn 0.05 film, and (001)-oriented MnAs film. It suggested that MgB 2 samples could be a promising sharing candidate for MR in cryogenic temperatures.