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Resistive transition broadening in two-phase polycrystalline YBaCuO

Published online by Cambridge University Press:  31 January 2011

J.C. Abele ,
R.L. Bristol ,
T.C. Nguyen ,
M.W. Ohmer  and
L.S. Wood
J.C. Abele
Affiliation:
Department of Physics, Lewis and Clark College, Portland, Oregon 97219
R.L. Bristol
Affiliation:
Department of Physics, Lewis and Clark College, Portland, Oregon 97219
T.C. Nguyen
Affiliation:
Department of Physics, Lewis and Clark College, Portland, Oregon 97219
M.W. Ohmer
Affiliation:
Department of Physics, Lewis and Clark College, Portland, Oregon 97219
L.S. Wood
Affiliation:
Department of Physics, Lewis and Clark College, Portland, Oregon 97219
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Abstract

A model proposed by Tinkham1 to explain the resistance versus temperature broadening found in high Tc superconductors in applied magnetic fields is extended to “foot and knee”-structured data taken on polycrystalline YBa2Cu3O6+δ. The proposed extension involves a series combination of two types of superconductors. For this series combination to result, a critical ratio of the two types of superconductors must be met—a result common to both percolation and randomized cellular autonoma theory. This critical ratio is investigated via statistical computer models of a polycrystalline superconductor having two phases of crystallites—one with substantially lower Jc than the other.

Type
Articles
Information
Journal of Materials Research , Volume 8 , Issue 5 , May 1993 , pp. 957 - 961
Copyright
Copyright © Materials Research Society 1993

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References

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