Reduced flux motion via flux creep annealing in high- J c single-crystal Y1Ba2Cu3O7

11 November 1991

journal article
research article
Published by AIP Publishing in Applied Physics Letters

Vol. 59 (20) , 2612-2614
https://doi.org/10.1063/1.105918

Abstract

We investigated the stabilization of magnetic flux in a high‐temperature superconductor (a proton‐irradiated Y₁Ba₂Cu₃O₇ crystal), by operating with subcritical current density J. Using the thermal history to obtain an induced current density J≤J_c, we observed a drastically reduced relaxation rate dM/dt (M=magnetization), after ‘‘flux creep annealing.’’ The results show that the field gradient ∼J∼M determined the relaxation rate, independent of the sample’s H‐T history, in agreement with recent theory.

Keywords

This publication has 16 references indexed in Scilit:

Low-temperature magnetic relaxation in ${YBa}_{2}$ ${Cu}_{3}$ $O_{7 - δ}$ : Evidence for quantum tunneling of vortices
Physical Review B, 1991
Defect independence of the irreversibility line in proton-irradiated Y-Ba-Cu-O crystals
Physical Review Letters, 1990
Dependence of flux-creep activation energy upon current density in grain-aligned ${YBa}_{2}$ ${Cu}_{3}$ $O_{7 - x}$
Physical Review B, 1990
Flux creep characteristics in high-temperature superconductors
Applied Physics Letters, 1990
Elimination of Current Dissipation in High Transition Temperature Superconductors
Science, 1990
Giant Flux Creep and Irreversibility in an Y-Ba-Cu-O Crystal: An Alternative to the Superconducting-Glass Model
Physical Review Letters, 1988
Flux Creep in Type-II Superconductors
Physical Review B, 1969
Hysteresis in Superconducting Alloys—Temperature and Field Dependence of Dislocation Pinning in Niobium Alloys
Physical Review B, 1969
Hard Superconductivity: Theory of the Motion of Abrikosov Flux Lines
Reviews of Modern Physics, 1964
Theory of Flux Creep in Hard Superconductors
Physical Review Letters, 1962