GLAG theory for superconducting property variations with A15 composition in Nb₃Sn wires.

ABSTRACT: We present a model for the variation of the upper critical field H _c2 with Sn content in A15-type Nb-Sn wires, within the Ginzburg-Landau-Abrikosov-Gor'kov (GLAG) theory frame. H _c2 at the vicinity of the critical temperature T _c is related quantitatively to the electrical resistivity ρ, specific heat capacity coefficient γ and T _c. H _c2 versus tin content is theoretically formulated within the GLAG theory, and generally reproduces the experiment results. As Sn content gradually approaches the stoichiometry, A15-type Nb-Sn undergoes a transition from the dirty limit to clean limit, split by the phase transformation boundary. The H-T phase boundary and pinning force show different behaviors in the cubic and tetragonal phase. We dipict t

SUBMITTER: Li Y 

PROVIDER: S-EPMC5430905 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature