Superconducting properties of V3Ga prepared by rapid liquid quenching and solid-state precipitation

Habbal, F.; Clemente, G. B.; Turnbull, D.
July 1989
Applied Physics Letters;7/10/1989, Vol. 55 Issue 2, p179
Academic Journal
A modified solid-state precipitation process for the formation of stoichiometric A-15 V3Ga is presented which results in high values of Tc=15.0 K and Hc2(4.2)=22 T, excellent phase homogeneity, and a high critical current Jc(4.2 K)=3×105–6×104 A/cm2 over the field range 0–18 T. We find that grain boundary pinning is dominant, producing a very high specific pinning force Qmax=6.4×104 dyn/cm2. The nonparamagnetically limited Hc2 is needed to explain our high flux-pinning results.


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