Thermal stability and annealing of columnar defects in Bi₂Sr₂Ca₁Cu₂O₈/Ag superconductor

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Title: Thermal stability and annealing of columnar defects in Bi₂Sr₂Ca₁Cu₂O₈/Ag superconductor
Author: Thompson, J. R. ; Paul, David ; Wang, Z. L. (Zhong Lin) ; Kroeger, D. M. ; Christen, D. K.
Abstract: This work establishes the stability at elevated temperatures of columnar defects, artificially formed in the Bi-based cupric oxide superconductor Bi₂Sr₂Ca₁Cu₂O₈ for enhanced vortex pinning. Isochronal anneals, conducted in air, led to losses of critical current density in two stages. The defects were relatively stable up to ~ 550 °C, where second stage annealing began; above this, the pinning diminished rapidly. The recrystallization and loss of columnar defects were corroborated by transmission electron microscopy.
Description: ©1995 American Institute of Physics. The electronic version of this article is the complete one and can be found online at: DOI:10.1063/1.114712
Type: Article
ISSN: 0003-6951
Citation: Applied Physics Letters, 67 (1995) 1007-1009
Date: 1995-08-14
Contributor: Oak Ridge National Laboratory
University of Tennessee, Knoxville. Dept. of Physics
Publisher: Georgia Institute of Technology
American Institute of Physics
Subject: Bismuth oxides
Strontium oxides
Calcium oxides
Copper oxides
High-TC superconductors
Magnetic flux
Crystal defects
Critical current
Transmission electron microscopy

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