Dependence of superconducting properties on lattice strain in MgB2

Authors

Wenxian Li, University of WollongongFollow
Rong Zeng, University of WollongongFollow
Lin Lu, University of WollongongFollow
S X. Dou, University of WollongongFollow

RIS ID

31490

Publication Details

Li, W, Zeng, R, Lu, L & Dou, SX (2010), Dependence of superconducting properties on lattice strain in MgB2, In Proceedings of the 9th International Conference on Materials and Mechanisms of Superconductivity, Sep 7-12, 2009, Tokyo, Japan, Physica C: Superconductivity and its Applications, 470 (Supplement 1), pp. S629-S630.

Abstract

As a phonon-media superconductor, the superconducting properties of MgB₂ are very sensitive to the lattice parameters. Lattice strain has significant effects on the superconducting properties in MgB₂ superconductor. We have systematically studied the relationship between lattice strain and superconducting properties (such as critical temperature, T_c, the upper critical field, H_c2, the irreversibility field, H_irr, and hence the critical current density, J_c) in pure and different chemical doped MgB₂ samples. In contrast to the common practice of improving the J_c and Hc₂ of MgB₂ through chemical substitution, by taking advantage of residual thermal strains we are able to design a composite, which shows only a small drop in T_c and little increase in resistivity, but a significant improvement over the J_c and H_c2 of MgB₂.

Grant Number

ARC/DP0770205

Additional Grant Number

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