Superconducting filament near a dislocation

Journal Article · Fri Sep 01 00:00:00 EDT 1978 · Sov. Phys. - JETP (Engl. Transl.); (United States)

OSTI ID:6200050

Nabutovskii, V M; Shapiro, V Y

It is shown on the basis of an analysis of the nonlinear Ginzburg--Landau equation that a superconducting ''filament'' capable of carrying a superconducting current is produced near an edge dislocation at a temperature T/sub 0/>T/sub c/ (T/sub c/ is the critical temperature of the homogeneous superconductor). Estimates for V/sub 3/Ge and Nb/sub 3/Sn yield a value I/sub c/approx.10/sup -5/--10/sup -6/ A, where I/sub c/ is the critical pair-breaking current (per dislocation). The state is localized in a region with a transverse dimension l>>xi/sub 0/, where xi/sub 0/ is the coherence length. In a magnetic field H/sub c/>H/sub c/2, where H/sub c/2 is the upper critical field of a homogeneous superconductor, a superconducting-phase plate appears near the dislocation and precedes the appearance of the mixed state. The function T/sub 0/(H/sub c/) is anisotropic in the regions of strong and weak fields. Estimates are presented for the diameter of the filament, for the shift of the temperature transition, as well as for the magnetic-field interval in which a superconducting plate exists in V/sub 3/Ge and Nb/sub 3/Sn. The effects for dislocation clusters are considered.

• Research Organization: Institute of Inorganic Chemistry, Siberian Division, USSR Academy of Sciences
• OSTI ID: 6200050
• Journal Information: Sov. Phys. - JETP (Engl. Transl.); (United States), Vol. 48:3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
SUPERCONDUCTORS
DISLOCATIONS
FILAMENTS
GERMANIUM ALLOYS
CRITICAL CURRENT
VANADIUM BASE ALLOYS
NIOBIUM BASE ALLOYS
TIN ALLOYS
CRITICAL FIELD
GINZBURG-LANDAU THEORY
TRANSITION TEMPERATURE
ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
CURRENTS
ELECTRIC CURRENTS
LINE DEFECTS
MAGNETIC FIELDS
NIOBIUM ALLOYS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
VANADIUM ALLOYS
360104* - Metals & Alloys- Physical Properties
656101 - Solid State Physics- Superconductivity- General Theory- (-1987)