Effect of Phase Composition of Superconductor Y3Ba5Cu8O18+δ on Its Conducting Characteristics

The effect of the method of synthesis on the crystallographic parameters, electrical properties, and oxygen nonstoichiometry of superconducting cuprate with nominal composition Y 3 Ba 5 Cu 8 O 18+δ was investigated. The samples were synthesized by a solid state reaction (sample A ), by coprecipitati...

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Bibliographic Details
Published in:Theoretical and experimental chemistry 2017, Vol.52 (6), p.342-348
Main Authors: Pilipenko, A. O., Nedilko, S. A., Dziazko, A. G., Fesich, I. V.
Format: Article
Language:English
Subjects:
Chemical synthesis
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Composition effects
Critical temperature
Crystallography
Electrical properties
Phase composition
Sol-gel processes
Superconductivity
Temperature dependence
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Summary:The effect of the method of synthesis on the crystallographic parameters, electrical properties, and oxygen nonstoichiometry of superconducting cuprate with nominal composition Y 3 Ba 5 Cu 8 O 18+δ was investigated. The samples were synthesized by a solid state reaction (sample A ), by coprecipitation of the hydroxocarbonates (sample B ), and by the sol–gel technique (sample C ). According to data from X-ray diffraction (XRD) and the temperature dependence of the specific resistance a single-phase superconductor is formed in the sol–gel method and has the highest critical temperature for transition to the superconducting state (T c = 95 K), whereas samples A and B contain impurity phases and have lower critical temperatures for transition (92 and 87 K, respectively).
ISSN:0040-5760
1573-935X
DOI:10.1007/s11237-017-9488-8