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Bulk Superconductivity in La2CuO4

Published online by Cambridge University Press:  28 February 2011

J. E. Schirber ,
E. L. Venturini ,
B. Morosin ,
J. F. Kwak ,
D. S. Ginley  and
R. J. Baughman
J. E. Schirber
Affiliation:
Sandia National Laboratories, P. O. Box 5800, Albuquerque, NM 87185
E. L. Venturini
Affiliation:
Sandia National Laboratories, P. O. Box 5800, Albuquerque, NM 87185
B. Morosin
Affiliation:
Sandia National Laboratories, P. O. Box 5800, Albuquerque, NM 87185
J. F. Kwak
Affiliation:
Sandia National Laboratories, P. O. Box 5800, Albuquerque, NM 87185
D. S. Ginley
Affiliation:
Sandia National Laboratories, P. O. Box 5800, Albuquerque, NM 87185
R. J. Baughman
Affiliation:
Sandia National Laboratories, P. O. Box 5800, Albuquerque, NM 87185
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Extract

There is considerable interest in the interplay, of superconductivity and magnetism in La2CuO4. Several groups [1–3] have noted signs of superconductivity in nominal La2CuO4, and antiferromagnetism has been reported[4] in La2CuO4-y with y>0. The superconductivity previously reported was of a filamentary nature because although resistance drops to near zero were observed, only small Meissner effects (∼10-3 to 10-4 of perfect diamagnetism) were observed. In this paper we describe our studies of. ceramic samples of La2CuO4-y, loaded with oxygen by high pressure. This technique results in substantial incorporation of O2 in the material (of the order of 0.3 to 0.4% by weight) and in gross changes in the bulk resistivity and magnetization as well as discernable changes in the lattice parameters of the material.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 99: Symposium AA – High-Temperature Superconductors , 1987 , 479
Copyright
Copyright © Materials Research Society 1988

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References

REFERENCES

1. Belile, J., Cabanel, R., Chaillout, C., Chevalier, B., Demazeau, G., Deslandes, F., Estourneau, J., Lejoy, P., Michel, C., Provost, J., Raveau, B., Sulpico, A., Tholence, J-L., and Tournier, R., C. of Acad. Sc. Paris 304 II, 1097 (1987).Google Scholar
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5. A preliminary report on this study was presented at LT18 in August, 1987.Google Scholar
6. In Collaboration with J. Jorgensen, to be published.Google Scholar
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