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First Synthesis of Bi2Sr2CaCu2Oy with the Highest Tc of 96 K

✍ Scribed by M. Kato; K. Yoshimura; K. Kosuge

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 89 KB
Volume: 106
Category: Article
ISSN: 0022-4596
DOI: 10.1006/jssc.1993.1313

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✦ Synopsis

By the combination of heat treatment in flowing (\left(99.8 % \mathrm{~N}{2}+0.2 % \mathrm{O}{2}\right)) gas and in flowing (\mathrm{H}{2}) gas, we have succeeded in synthesizing (\mathrm{Bi}{2} \mathrm{Sr}{2} \mathrm{CaCu}{2} \mathrm{O}{y}) having the stoichiometric cation composition with the highest (T{\mathrm{c}}) of (96 \mathrm{~K}) among the Bi2212 related compounds prepared so far. The oxygen content (y) was measured to be 8.72 by the method of coulometric titration. Alternating current magnetic susceptibility measurements for powdered samples revealed that the superconducting transition of this Bi2212 phase is rather sharp and the Meissner volume fraction is comparable with (\mathrm{YBa}{2} \mathrm{Cu}{3} \mathrm{O}_{7}). 1993 Academic Press, Inc.

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