Modelling of Critical Current Density of Sintered Ag Added Bulk MgB2
M. Santosh
E300 Huron Str., M5S 3J6, Faculty of Arts and Science, University of Toronto, Canada
Received: January 16, 2016; In final form: May 25, 2016
Full Text PDF
Magnetic field dependence of critical current density (Jc) of bulk MgB2 material at 20 K is reported. The selected sintered MgB2 materials contained various amounts of silver. The silver added samples possess always a higher critical current density than the silver free ones. The critical current density increased with silver content and continuously decreased with increase of magnetic field. Further, the normalized volume pinning force density, fp=Fp/Fp,max, versus reduced field h = Ha/Hirr for silver free and silver added samples suggested that grain boundary pinning is dominant. In essence, the model of thermal activated flux motion was successfully applied to fit the critical current density of the MgB2 materials.

DOI: 10.12693/APhysPolA.129.1197
PACS numbers: 74.72.-h, 74.25.Sv, 74.20.-z