X-Ray and Electron Microscopic Study of a High Temperature Superconductor Y0.4Ba0.6CuO2.22
- 1 April 1987
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 26 (4A) , L498
- https://doi.org/10.1143/jjap.26.l498
Abstract
A superconducting oxide Y0.4Ba0.6CuO2.22 with T c higher than 88 K was synthesized. The crystal structure was found to be a derivative of the perovskite structure with orthorhombic unit cell dimensions of a=3.818 (1) Å, b=3.888 (1) Å, c=11.667 (4) Å, and V=173.19 (8) Å3. Basic unit cell of the cubic perovskite structure was tripled along the c axis, probably due to the ordering of Y3+ and Ba2+ ions and/or of oxygen vacancy. Apparent short bond length for Cu-O may partly be explained by oxygen vacancy amounting to a quarter, but the observed high T c suggests actual contraction of Cu-O bonds.Keywords
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