Skip to main content Accessibility help
×
Home

Critical Current Enhancement in Single-Crystal Ba2Ycu3O7

  • R. B. van Dover (a1), E. M. Gyorgy (a1), L. F. Schneemeyer (a1), A. E. White (a1), S. Glarum (a1), R. J. Felder (a1) and J. V. Waszczak (a1)...

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.

Copyright

References

Hide All
1 Wordenweber, R., Heinemann, K., Sastry, G. V. S. and Freyhardt, H. C., to be published in Physica C.
2 Umezawa, A., et al. ., Phys. Rev. B36, 7151 (1987).
3 Fleischer, R. L., Hart, H. R., Lay, K. W., and Luborsky, F. E., Phys. Rev. B40, 2163 (1989).
4 Wisniewski, A., et al. ., Solid St. Commun., 65, 577 (1988).
5 Cost, J. R., Willis, J. O., Thompson, J. D., and Peterson, D. E., Phys. Rev., B37, 1563 (1988).
6 Kupfer, H., et al. ., in The Science of Superconductivity and New Materials (ed. Nakajima, S.) (World Scientific, Singapore) p.172.
7 van Dover, R. B., et al. ., Nature 342, 57 (1989).
8 Schneemeyer, L. F., et al. ., Nature 328, 601 (1987).
9 van Dover, R. B., et al. ., to be published.
10 Glarum, S., Schneemeyer, L. F., and Waszczak, J. V., Phys. Rev. B, (in press).
11 Martin, S., private communication.
12 Summers, G. P., et al. ., Appl. Phys. Lett., 55,1469 (1989).

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed