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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 9, Number 5
May 20, 1988 

Magnetic and Electrical Properties of High-Tc Superconductor YBa2Cu3O6.87
Don Kim, Chang Kwon Kang, Keu Hong Kim*, Jae Shi Choi
The structural, electrical and magnetic properties were investigated for the high-Tc superconductor YBa2Cu3O7-x, where x was 0.13. The results of temperature dependence of the resistivity and the magnetization in YBa2Cu3O6.87 whose structure and phase are confirmed by arialysis of X-ray powder diffraction pattern have been reported. A very sharp superconductivity transition appears at 92K in the specimen whose chemical composition is determined from redox titration, strongly suggesting that this specimen consists of a single-phase superconductor. From the results of X-ray diffraction analysis, magnetization curves, levitation and resistance measurements, it is suggested that the observed superconductivity is bulk property in nature and that the YBa2Cu3O6.87 phase is responsible for the superconductivity of the present reproducible specimen.
280 - 282
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