Low Temperature Physics: 32, 846 (2006); https://doi.org/10.1063/1.2219507 (3 pages)
Fizika Nizkikh Temperatur: Volume 32, Number 8-9 (August 2006), p. 1115-1118    ( to contents , go back )

Percolation and Josephson effect in HTSC composites based on yttrium ceramic

J.G. Sanikidze, R.G. Kokhreidze, and S.V. Odenov

Institute of Cybernetics on Academy of Sciences Georgia, S. Euli st. 5, Tbilisi, 0186, Georgia
E-mail: juniko@posta.ge, jumbersanikidze@yahoo.com
pos Анотація:

Received March 3, 2006, revised April 5, 2006

Abstract

Percolation processes in Y-HTSC-based composites and their magnetic susceptibility are investigated. The value of the superconducting fraction for different amounts of nonsuperconducting additional fractions is estimated. The percolation conductivity limit through the superconducting grains of the HTSC-dielectric composite is (17±2)% of the superconducting volume fraction. Their Josephson properties near the percolation limit are investigated.

PACS:
74.72.Bk - Y-based cuprates
74.81.Bd - Granular, melt-textured, amorphous, and composite superconductors

Key words: Josephson effect, percolation, HTSC

Download 90232 byte View Contents