Accession Number:

AD0684108

Title:

CRITICAL FIELD RATIO Hc3/Hc2 FOR PURE SUPERCONDUCTORS OUTSIDE THE LANDAU-GINZBURG REGION. II. T APPROXIMATELY EQUAL TO Tc.

Descriptive Note:

Technical rept.,

Corporate Author:

MARYLAND UNIV COLLEGE PARK DEPT OF PHYSICS AND ASTRONOMY

Personal Author(s):

Report Date:

1969-02-01

Pagination or Media Count:

43.0

Abstract:

The appropriate generalization of Gorkovs linearized gap equation for a pure, weak coupling, semiinfinite superconductor in a magnetic field, separated from vacuum or an insulator by a specularly reflecting surface, was found in a previous paper. In that paper we used the gap equation to study the surface nucleation critical field Hc3 at T approx. 0 deg. K. Here we study the region T approx. Tc and find the first three non-trivial terms in an expansion of the ratio Hc3THc2T to be 1.695 1 0.614 1-t - 0.577 1-t to the 32 power where t is identically equal to TTc. The term linear in 1-t has been found previously but the last term is new. For T close enough to Tc we show that the system is accurately described by the linearized Landau-Ginzburg equation with the usual boundary condition and thus regain the results of Saint James and de Gennes. Author

Subject Categories:

  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE