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Weak Pinning Centers in Proton Irradiated YBCO Single Crystals

Published online by Cambridge University Press:  28 February 2011

Y. J. Zhao ,
J. R. Liu ,
Y. K. Tao ,
P. H. Hor  and
W. K. Chu
Y. J. Zhao
Affiliation:
Texas Center for Superconductivity, University of Houston, Houston TX 77204–5932
J. R. Liu
Affiliation:
Texas Center for Superconductivity, University of Houston, Houston TX 77204–5932
Y. K. Tao
Affiliation:
Texas Center for Superconductivity, University of Houston, Houston TX 77204–5932
P. H. Hor
Affiliation:
Texas Center for Superconductivity, University of Houston, Houston TX 77204–5932
W. K. Chu
Affiliation:
Texas Center for Superconductivity, University of Houston, Houston TX 77204–5932
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Abstract

Observed magnetic Jc enhancement in a 3.4 MeV proton-irradiated Y1Ba2Cu3O7-δ (YBCO) single crystal are shown to be intimately linked with a kind of weak pinning centers. Applied magnetic field transforms weak centers into the normal state or pinning centers, which then cause pinning enhancement. Strong pinning anisotropy of the radiation induced weak center can be explained very well by the size anisotropy of a superconducting unit cell and a flux line, or the coherence length.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 235: Symposium A – Phase Formation and Modification by Beam-Solid Interactions , 1991 , 677
Copyright
Copyright © Materials Research Society 1992

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References

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