
Accession Number : AD0684108
Title : CRITICAL FIELD RATIO Hc3/Hc2 FOR PURE SUPERCONDUCTORS OUTSIDE THE LANDAUGINZBURG 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) : Hu,ChiaRen ; Korenman,Victor
Report Date : FEB 1969
Pagination or Media Count : 43
Abstract : The appropriate generalization of Gor'kov's 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 nontrivial terms in an expansion of the ratio Hc3(T)/Hc2(T) to be 1.695 (1 + 0.614 (1t)  0.577 (1t) to the 3/2 power) where t is identically equal to T/Tc. The term linear in (1t) 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 LandauGinzburg equation with the usual boundary condition and thus regain the results of Saint James and de Gennes. (Author)
Descriptors : (*SUPERCONDUCTORS, MAGNETIC FIELDS), QUANTUM THEORY, BOUNDARY VALUE PROBLEMS, TRANSITION TEMPERATURE, VANADIUM, NIOBIUM, SUPERCONDUCTIVITY, THESES
Subject Categories : Electricity and Magnetism
Distribution Statement : APPROVED FOR PUBLIC RELEASE