TITLE

Critical Current in High-Temperature Superconductors with Disordered Tilt Grain Boundaries

AUTHOR(S)
Kukushkin, S. A.; Ovid’ko, I. A.; Osipov, A. V.
PUB. DATE
July 2000
SOURCE
Technical Physics Letters;Jul2000, Vol. 26 Issue 7, p609
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A model is suggested to describe the effect of tilt grain boundaries with partly random dislocation distribution on the critical current value in high-temperature superconductors. Within this model, the field of grain-boundary stresses σ[sub αβ] acquires a much more pronounced long-range character than in the case of a periodic dislocation arrangement. At large distances x from a tilt grain boundary, σ[sub αβ] ∝ x[sup -3/2] (which corresponds to the quasi-equidistant dislocation walls), whereas at small x, we have σ[sub αβ] ∝ x[sup -½] (which corresponds to randomly arranged dislocation walls). A region with stresses exceeding a certain critical value is treated as the region of normal metal, and, therefore, the critical current passing through this region decreases exponentially. It is shown that the model suggested satisfactorily agrees with experimental data.
ACCESSION #
7326344

 

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics