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Plasma Oxidation of Y-Ba-Cu-O Precursor Filaments

Published online by Cambridge University Press:  16 February 2011

J. D. Klein ,
J. P. Hachey  and
A. Yen
J. D. Klein
Affiliation:
EIC Laboratories, Norwood, MA 02062
J. P. Hachey
Affiliation:
EIC Laboratories, Norwood, MA 02062
A. Yen
Affiliation:
EIC Laboratories, Norwood, MA 02062
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Abstract

YBa2Cu3O7 filaments produced from a soluble molecular precursor were reacted using low pressure oxygen heat treatments with and without an applied plasma. Filaments reacted at temperatures between 750 and 800°C with the aid of an oxygen plasma were found to have higher transition temperatures than those reacted under similar conditions without a plasma. The highest zero resistance critical temperature, Tc(0) = 91.6 K, was obtained from a filament reacted in a 0.2 Torr oxygen plasma at 800°C. At the lowest reaction plasma temperature of 700°C a Tc(0) of 88.0 K was observed. X-ray diffraction revealed that filaments reacted at an oxygen pressure of 1 atm were nearly tetragonal while those reacted at 0.2 Torr, with or without a plasma, were quite orthorhombic.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 223: Symposium E – Low Energy Ion Beam and Plasma Modification of Materials , 1991 , 165
Copyright
Copyright © Materials Research Society 1991

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References

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