AUTOMATIC FORMATION OF SUPERCONDUCTIVE PHASE IN THE Y–Ba–Cu–O COMPOUND SYSTEM

1 August 1987

journal article
Published by World Scientific Pub Co Pte Ltd in International Journal of Modern Physics B

Vol. 1 (3) , 1035-1047
https://doi.org/10.1142/s0217979287001535

Abstract

Real compositions and structures of various samples of Y-Ba-Cu-O compound have been studied by Rutherford backscattering (RBS), nuclear reaction, electron probe microanalysis (EPMA), high-resolution electron microscopy (HREM) and X-ray diffraction. Results show that in this system all superconductive samples with different nominal compositions have a tendency to form a superconductive phase of perovskite-like YBa₂Cu₃O₇ (Phase A), and the remaining constituents are gathered to another phase (Phase B). Therefore the chemical compositions of this compound system are insensitive to Tc and the superconductor is relatively easy to be prepared.

Keywords

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