Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-26T20:23:44.175Z Has data issue: false hasContentIssue false
  • English
  • Français

Microstructure and properties of Cu-rich 123: Part II. Homogeneous copper and high magnetic Jc

Published online by Cambridge University Press:  31 January 2011

J.P. Zhang ,
D.J. Li ,
C. Boldt ,
R. Plass ,
V. Dravid ,
L.D. Marks ,
C.H. Lin ,
J.A. Eades ,
A. Sodonis  and
W. Wolbach
...Show all authors
J.P. Zhang
Affiliation:
Science and Technology Center for Superconductivity, Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208-3108
D.J. Li
Affiliation:
Science and Technology Center for Superconductivity, Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208-3108
C. Boldt
Affiliation:
Science and Technology Center for Superconductivity, Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208-3108
R. Plass
Affiliation:
Science and Technology Center for Superconductivity, Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208-3108
V. Dravid
Affiliation:
Science and Technology Center for Superconductivity, Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208-3108
L.D. Marks
Affiliation:
Science and Technology Center for Superconductivity, Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208-3108
C.H. Lin
Affiliation:
Science and Technology Center for Superconductivity, Materials Research Laboratory, University of Illinois at Champaign–Urbana, 104 South Goodwin, Urbana, Illinois 61801
J.A. Eades
Affiliation:
Science and Technology Center for Superconductivity, Materials Research Laboratory, University of Illinois at Champaign–Urbana, 104 South Goodwin, Urbana, Illinois 61801
A. Sodonis
Affiliation:
Science and Technology Center for Superconductivity, The Enrico Fermi Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637
W. Wolbach
Affiliation:
Science and Technology Center for Superconductivity, The Enrico Fermi Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637
J.M. Chabala
Affiliation:
Science and Technology Center for Superconductivity, The Enrico Fermi Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637
R. Levi-Setti
Affiliation:
Science and Technology Center for Superconductivity, The Enrico Fermi Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637
Get access

Abstract

Copper- and yttrium-rich YBa2Cu3O7 bulk superconductors have been prepared by mixing copper oxide or yttrium oxide in nitric acid and adding the solution to premade stoichiometric YBa2Cu3O7 followed by annealing. In contrast to materials made by mixing oxide powders, both samples contain copper-rich defects spread homogeneously throughout the grains, either small platelet copper oxide precipitates or bundles of planar defects (Cu–O double planes). These materials also show large magnetic hysteresis at 77 K, comparable to the results obtained from decomposed YBa2Cu4O8. This implies that small copper oxide precipitates and bundles of planar defects are strong flux pinners, and indicates a processing route to producing large amounts of strongly intragranular pinned superconductors. However, the materials also show clean grain boundaries, so an equally valid interpretation is that there is a substantial component of intergranular superconductivity in field, enhancing the effective circuit size to a value far larger than the grain size.

Type
Articles
Information
Journal of Materials Research , Volume 8 , Issue 6 , June 1993 , pp. 1232 - 1239
Copyright
Copyright © Materials Research Society 1993

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1Zhang, J.P., Li, D.J., Marks, L.D., Lin, C.H., Eades, J.A., Sodonis, A., Wolbach, W., Chabala, J. M., and Levi-Setti, R., J. Mater. Res. 7, 572 (1992).CrossRefGoogle Scholar
2Marks, L. D., Li, D. J., Shibahara, H., and Zhang, J. P., J. Electron Microsc. Technique 8, 297 (1988).CrossRefGoogle Scholar
3Zandbergen, H. W., Gronsky, R., Wang, K., and Thomas, G., Nature 331, 596 (1988).CrossRefGoogle Scholar
4Shibahara, H., Marks, L.D., Hwu, S-J., and Poeppelmeier, K. R., J. Solid State Chem. 79, 194 (1989).CrossRefGoogle Scholar
5Levi-Setti, R., Wang, Y. L., and Crow, G., Appl. Surf. Sci. 26, 249 (1986).CrossRefGoogle Scholar
6Chabala, J. M., Levi-Setti, R., and Wang, Y. L., Microbeam Analysis-1989 (San Francisco Press, San Francisco, CA, 1989), p. 586.Google Scholar
7Dravid, V.P., Zhang, H., Marks, L.D., and Zhang, J.P., Physica C 192, 31 (1992).CrossRefGoogle Scholar
8Bean, C.P., Phys. Rev. Lett. 8, 250 (1962).CrossRefGoogle Scholar
9Jin, S., Tiefel, T.H., Nakahara, S., Graebner, J.E., O'Bryan, H.M., Fastnacht, R.A., and Kammlott, G.W., Appl. Phys. Lett. 56, 1287 (1990).CrossRefGoogle Scholar
10Weir, S.T. and Nellis, W. J., Appl. Phys. Lett. 56, 2042 (1990).CrossRefGoogle Scholar
11Larbalestier, D. C., Babcock, S. E., Cai, X. Y., Field, M. B., Gao, Y., Heinig, N.F., Keiser, D.L., Merkle, K., Williams, L.K., and Zhang, N., Physica C 185, 315 (1991).CrossRefGoogle Scholar
12Shelton, R.N., in High Temperature Superconductivity, edited by Lynn, J.W. (Springer-Verlag, Berlin, 1990), p. 168.CrossRefGoogle Scholar