Preparation and characterization of magnesium diboride superconductor by melting process

Abstract

o C for 24 hrs. The samples were characterized by using XRD, EDX, SEM, four probe AC methods and magne- tization measurements using SQUID magnetometer. The critical temperature was found to be 39 K which shifts towards lower temperature with increasing applied field (0 to 9T). The critical current density, according to Bean's critical state model was estimated and found to be ~10 5 A/cm 2 , which is comparable to the reported data.