Superconducting Phases with Tc above 100 K in the Tl-Ba-Ca-Cu-O System
- 1 April 1988
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 27 (4A) , L591-593
- https://doi.org/10.1143/jjap.27.l591
Abstract
Superconductivity above 100 K was observed in Tl-Ba-Ca-Cu oxides. DC resistivity, ac susceptibility, EPMA and X-ray diffraction studies revealed that two superconducting phases with different T c's of ∼110 K and 100 K exist in this oxide system. The 110 K phase is Tl2Ba2Ca2Cu3O x (2223 phase) with a 5.45×5.45×35.6 Å tetragonal unit cell, while the 100 K phase is Tl2Ba2Ca1Cu2O x (2212 phase) with a 5.45×5.45×29.3 Å tetragonal unit cell. The crystal structure of the 2212 phase seems quite similar to that of Bi2Sr2Ca1Cu2O x , and the 2223 phase structure can be derived by inserting another Cu and Ca layer into the 2212 phase.Keywords
This publication has 4 references indexed in Scilit:
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- Identification of the Superconducting Phase in the Bi-Ca-Sr-Cu-O SystemJapanese Journal of Applied Physics, 1988
- A New High-Temperature Superconductor: Bi 2 Sr 3-x Ca x Cu 2 O 8+yScience, 1988
- A New High-Tc Oxide Superconductor without a Rare Earth ElementJapanese Journal of Applied Physics, 1988