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X-Ray Study of Superconducting Y1Ba2Cu3−xFexOy Compounds

Published online by Cambridge University Press:  28 February 2011

G. Gonzalez ,
D. Rios-Jara ,
T. Akachi ,
R. Barrio ,
L. BañOs  and
R. Escudero
G. Gonzalez
Affiliation:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Apdo. Postal 70–360, 04510 México Distrito Federal, México.
D. Rios-Jara
Affiliation:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Apdo. Postal 70–360, 04510 México Distrito Federal, México.
T. Akachi
Affiliation:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Apdo. Postal 70–360, 04510 México Distrito Federal, México.
R. Barrio
Affiliation:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Apdo. Postal 70–360, 04510 México Distrito Federal, México.
L. BañOs
Affiliation:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Apdo. Postal 70–360, 04510 México Distrito Federal, México.
R. Escudero
Affiliation:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Apdo. Postal 70–360, 04510 México Distrito Federal, México.
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Abstract

Superconducting compounds of Y1B2C3−xFexOy, with x=0.125, 0.0625, 0.125 and 0.300, were studied using X-ray powder diffractometry. Two sets of samples were prepared. Samples quenched from 950°C to liquid nitrogen temperature showed a tetragonal non-superconducting phase, whose lattice parameters depend on the Fe content and differ from those of the yttrium 1:2:3 tetragonal phase. Samples oxygenated at 450°C showed an orthorhombic to tetragonal phase transition for Fe contents higher than x=0.0625. The lattice parameters of this tetragonal phase were different from those of both tetragonal phases mentioned above. All these observations allow us to conclude that C(l) sites are occupied at least partially by Fe impurities.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 99: Symposium AA – High-Temperature Superconductors , 1987 , 899
Copyright
Copyright © Materials Research Society 1988

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References

REFERENCES

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