Critical currents in niobium bicrystals

Journal Article · Wed Dec 01 04:00:00 EST 1982 · Sov. Phys. - JETP (Engl. Transl.); (United States)

OSTI ID:5836811

Vinnikov, L Y; Zasavitskii, E A; Moskvin, S I

A systematic study of critical currents in niobium bicrystals was carried out to determine the mechanism of the interaction of vortices with grain boundaries in type-II superconductors. By using bicrystal specimens, the elementary pinning force: the interaction force between a vortex of unit length and a grain boundary: could be determined directly from the experimental results, and was approx.10/sup -6/ to 10/sup -5/ Nxm/sup -1/. The experimental results can be explained on the basis of a mechanism connected with the anisotropy of superconducting properties. In bicrystals with the tilt boundary close to the twin boundary, pinning can be produced by the formation of a localized superconducting state along such a boundary.

• Research Organization: Institute of Solid-State Physics, Academy of Sciences of the USSR
• OSTI ID: 5836811
• Journal Information: Sov. Phys. - JETP (Engl. Transl.); (United States), Journal Name: Sov. Phys. - JETP (Engl. Transl.); (United States) Vol. 56:6; ISSN SPHJA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
BICRYSTALS
CRITICAL CURRENT
CRYSTAL STRUCTURE
CRYSTALS
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELEMENTS
GRAIN BOUNDARIES
MAGNETIC FLUX
METALS
MICROSTRUCTURE
NIOBIUM
PHYSICAL PROPERTIES
POLYCRYSTALS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TRANSITION ELEMENTS
TYPE-II SUPERCONDUCTORS