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Oxygen diffusion in Y1Ba2Cu3O7-δ grains: An experimental study of ozone and oxygen annealing processes

Published online by Cambridge University Press:  31 January 2011

Yi Song ,
Xiao-Dong Chen ,
James R. Gaines  and
John W. Gilje
Yi Song
Affiliation:
Department of Physics and Astronomy, University of Hawaii at Manoa, Honolulu, Hawaii 96822
Xiao-Dong Chen
Affiliation:
Department of Physics and Astronomy, University of Hawaii at Manoa, Honolulu, Hawaii 96822
James R. Gaines
Affiliation:
Department of Physics and Astronomy, University of Hawaii at Manoa, Honolulu, Hawaii 96822
John W. Gilje
Affiliation:
Department of Chemistry, University of Hawaii at Manoa, Honolulu, Hawaii 96822
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Abstract

By monitoring the electrical resistivity of single phase polycrystalline Y1Ba2Cu3O7-δ samples while changing their oxygen content in both ozone and ordinary oxygen environments, we were able to investigate the correlation between their average oxygen content and the diffusion time for oxygen inside the grains. We model the resistivity time dependence as a two-step process and find that this explains our experimental results satisfactorily. From this model we are able to estimate a value of the oxygen diffusion coefficient from our data that agrees well with other measurements. We also conclude that while ozone and ordinary oxygen may have different effects in oxidizing the surface of grains, they show no observable differences in the oxygen diffusion process in the bulk Y1Ba2Cu3O7-δ material.

Type
Articles
Information
Journal of Materials Research , Volume 5 , Issue 1 , January 1990 , pp. 27 - 32
Copyright
Copyright © Materials Research Society 1990

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References

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