Improved superconducting properties of in situ powder-in-tube processed Mg1.15B2/Fe wires with nano-size SiC addition

Authors

Wenxian Li, University of WollongongFollow
Rong Zeng, University of WollongongFollow
Lin Lu, University of WollongongFollow
Yun Zhang, University of WollongongFollow
S. X. Dou, University of WollongongFollow
Y Li, Shanghai University China
R H. Chen, Shanghai University, China
M Y. Zhu, Shanghai University, China

RIS ID

31456

Publication Details

Li, W., Zeng, R., Lu, L., Zhang, Y., Dou, S. Xue., Li, Y., Chen, R. & Zhu, M. (2009). Improved superconducting properties of in situ powder-in-tube processed Mg_1.15B₂/Fe wires with nano-size SiC addition. Physica C: Superconductivity and its Applications, 469 (15-20), 1519-1522.

Abstract

The field dependence of the superconducting properties and mechanism of nano-SiC doped Mg_1.15B₂/Fe wires was investigated systematically. Compared with the MgB₂+10wt%SiC sample, the critical current, J_c under low magnetic field increase for Mg_1.15B₂+10wt%SiC sample due to the improved grain connectivity because of the excess Mg in the raw materials. The quality of connectivity is evaluated through the active area fraction, A_F, based on the temperature dependence behavior of resistivity. The increased J_c under high magnetic field is attributed to the increased upper critical field, H_c2 and irreversibility field, H_irr for the electron scattering effects of the massive carbon substitution for boron, impurities, and defects.

Grant Number

ARC/DP0770205

Additional Grant Number

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