Abstract
Superconducting MgB2 strands with nanometer-scale SiC additions have been investigated systematicallyusing transport and magnetic measurements. A comparative study ofMgB2 strands with different nano-SiC addition levels has shown C-doping-enhanced critical current densityJc through enhancements in the upper critical field,Hc2, and decreased anisotropy. The critical current density and flux pinning force densityobtained from magnetic measurements were found to be substantially different from thevalues obtained through transport measurements, particularly with regards to magneticfield dependence. The differences in magnetic and transport results are largelyattributed to connectivity related effects. On the other hand, based on the scalingbehavior of the flux pinning force, there may be other effective pinning centers inMgB2 strands in addition to grain boundary pinning.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
