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Neutron Diffraction Studies of High TC Superconductors

Published online by Cambridge University Press:  28 February 2011

D. G. Hinks ,
B. Dabrowski ,
K. Zhang ,
C. U. Segre ,
J. D. Jorgensen ,
L. Soderholm  and
M. A. Beno
D. G. Hinks
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
B. Dabrowski
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
K. Zhang
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
C. U. Segre
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
J. D. Jorgensen
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
L. Soderholm
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
M. A. Beno
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
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Abstract

We have investigated the structure and composition of La2CuO4 (both pure and Sr-doped) and Nd(Ba2−xNdx)Cu3O7 using powder neutron diffraction. In La2−xSrxCuO4, Tc reacnes its maximum at x=0.15, after which vacancies are introduced in the 2D planes and superconductivity is destroyed. Superconductivity in La2CuO4 is not bulk. No evidence for nonstoichlometry in this material can be observed. In the Nd(Ba2−xNdx)Cu3O7 system, Tc is a complex function of oxygen ordering and electronic effects.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 99: Symposium AA – High-Temperature Superconductors , 1987 , 9
Copyright
Copyright © Materials Research Society 1988

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References

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