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Synthesis of Cuprate Based High-Tc Superconductors by Polymerized Complex Method

Published online by Cambridge University Press:  25 February 2011

Masato Kakihana ,
Masahiro Yoshimura ,
Hiromasa Mazaki ,
Hiroshi Yasuoka  and
Lars BöRj Esson
Masato Kakihana
Affiliation:
Research Laboratory of Engineering Materials, Tokyo Institute of Technology, Nagatsuta 4259, Midori-ku, Yokohama 227, Japan
Masahiro Yoshimura
Affiliation:
Research Laboratory of Engineering Materials, Tokyo Institute of Technology, Nagatsuta 4259, Midori-ku, Yokohama 227, Japan
Hiromasa Mazaki
Affiliation:
Department of Mathematics and Physics, The National Defense Academy, Hashirimizu I-10–20, Yokosuka 239, Japan
Hiroshi Yasuoka
Affiliation:
Department of Mathematics and Physics, The National Defense Academy, Hashirimizu I-10–20, Yokosuka 239, Japan
Lars BöRj Esson
Affiliation:
Department of Physics, Chalmers University of Technology, S412 96 Göteborg, Sweden
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Abstract

We report on a novel precursor technique to produce highly pure and homogeneous cuprate based high-Tc superconductors based on the formation of a polymer metal complex in which various metal ions in desired stoichiometric ratio can be uniformly dispersed. Application of the polymerized complex method is demonstrated on the ceramic synthesis of polycrystalline compounds viz. YBa2Cu3Oy, YBa2Cu4Oy, Bi1.6Pb0.4Sr2Ca2Cu3Oy and Bi2Sr2Ca0.8Cu2Oy. The superconducting properties were studied with complex magnetic susceptibility measurements which exhibited sharp superconducting transitions without any indication of two-phase character. The materials fabricated by this method showed improved properties compared to those for ceramic samples of previously reported synthesis procedures.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 271: Symposium N – Better Ceramics Through Chemistry V , 1992 , 395
Copyright
Copyright © Materials Research Society 1992

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References

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