Flux pinning mechanisms in graphene-doped MgB2 superconductors

Authors

K De Silva, University of WollongongFollow
Xun Xu, University of Wollongong
Sanjeev Gambhir, University of WollongongFollow
Xiaolin Wang, University of WollongongFollow
Wenxian Li, University of WollongongFollow
G G. Wallace, University of WollongongFollow
S. X. Dou, University of WollongongFollow

RIS ID

38096

Publication Details

De Silva, K. S. B., Xu, X., Gambhir, S., Wang, X., Li, W. X., Wallace, G. G. & Dou, S. Xue. (2011). Flux pinning mechanisms in graphene-doped MgB₂ superconductors. Scripta Materialia, 65 (7), 634-637.

Abstract

The effects of graphene doping on the superconducting properties of MgB₂ were studied. We found that small addition of graphene significantly improves the superconducting properties of MgB₂, with only a small reduction in T_c. Low resistivity, high critical fields and enhanced flux-flow activation energy were observed for the optimally doped bulk sample. The spatial fluctuation in the transition temperature (δT_c pinning) is the flux pinning mechanism in graphene-doped MgB₂.

Grant Number

ARC/DP0770205, ARC/FF0669110

Additional Grant Number

http://purl.org/au-research/grants/ARC/DP0770205

http://purl.org/au-research/grants/ARC/FF0669110