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Preparation of Fibrous Bi(Pb)-Sr-Ca-Cu-O Crystals Containing the High-Tc Phase

Published online by Cambridge University Press:  28 February 2011

I. Matsubara ,
H. Tanigawa ,
T. Ogura ,
H. Yamashita ,
M. Kinoshita  and
T. Kawai
I. Matsubara
Affiliation:
Government Industrial Research Institute, Osaka Midorigaoka, Ikeda, Osaka 563, Japan
H. Tanigawa
Affiliation:
Government Industrial Research Institute, Osaka Midorigaoka, Ikeda, Osaka 563, Japan
T. Ogura
Affiliation:
Government Industrial Research Institute, Osaka Midorigaoka, Ikeda, Osaka 563, Japan
H. Yamashita
Affiliation:
Government Industrial Research Institute, Osaka Midorigaoka, Ikeda, Osaka 563, Japan
M. Kinoshita
Affiliation:
Government Industrial Research Institute, Osaka Midorigaoka, Ikeda, Osaka 563, Japan
T. Kawai
Affiliation:
The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567, Japan
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Abstract

Fibrous crystals containing the high-Tc phase (2223 phase) of the Bi(Pb)-Sr-Ca-Cu-O superconductor have been prepared by heating a glassy melt-quenched plate in a stream of oxygen gas. Each fiber is composed of several platelike single crystals which are stacked in a layered structure. The fibers show two stepdrops in resistance at 105K and 73K, and a zero-resistance state around 70K. From the results of SQUID measurements, the volume fraction of the high-T phase is found to be about 0.6%. The high-Tc phase is also detected with a microarea X-ray diffractometer, and it is stacked in the interlayer between the low-Tc platelike crystals. For the fibrous Bi-Sr-Ca-Cu-Li-O crystals, the volume fraction of the high-Tc phase increases to 1.5% and a zero resistance state is achieved at 81K. The Jc value of the Li doped fiber is 30,000A/cm2 at 77K and 300,000A/cm2 at 66K in a zero magnetic field.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 325
Copyright
Copyright © Materials Research Society 1990

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References

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