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Critical Current Enhancement in Single-Crystal Ba2Ycu3O7

Published online by Cambridge University Press:  28 February 2011

R. B. van Dover ,
E. M. Gyorgy ,
L. F. Schneemeyer ,
A. E. White ,
S. Glarum ,
R. J. Felder  and
J. V. Waszczak
R. B. van Dover
Affiliation:
AT&T Bell Labs, Murray Hill, NJ 07974
E. M. Gyorgy
Affiliation:
AT&T Bell Labs, Murray Hill, NJ 07974
L. F. Schneemeyer
Affiliation:
AT&T Bell Labs, Murray Hill, NJ 07974
A. E. White
Affiliation:
AT&T Bell Labs, Murray Hill, NJ 07974
S. Glarum
Affiliation:
AT&T Bell Labs, Murray Hill, NJ 07974
R. J. Felder
Affiliation:
AT&T Bell Labs, Murray Hill, NJ 07974
J. V. Waszczak
Affiliation:
AT&T Bell Labs, Murray Hill, NJ 07974
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Abstract

The critical current density, Jc, of single crystals of Ba2YCu3O7 is comparable to that of melt-textured-growth materials as well as to the intragrain Jc of bulk polycrystalline Ba2YCu3O7. Typical values at 77 K and 9 kOe are near 5x 103 A/cm2, and are presumably limited by weak pinning. We have obtained a significant enhancement of this pinning-limited Jc by three techniques: 1) a short reannealing procedure, 2) fast neutron irradiation, and 3) proton irradiation. Interestingly, the combination of the first technique followed by either irradiation is not as effective as the iradiation alone. That is, the best candidates for irradiation are not necessarily those with the highest initial Jc.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 911
Copyright
Copyright © Materials Research Society 1990

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References

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