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Chemical reaction at the interface between (Hg0.9Re0.1)Ba2CaCu2Oy thin film and SrTiO3 substrate

Published online by Cambridge University Press:  31 January 2011

Xiao-Jing Wu ,
N. Inoue ,
T. Sugano ,
T. Morishita  and
K. Tanabe
Xiao-Jing Wu
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 10-13 Shinonome, 1-Chome, Koto-Ku, Tokyo 135, Japan
N. Inoue
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 10-13 Shinonome, 1-Chome, Koto-Ku, Tokyo 135, Japan
T. Sugano
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 10-13 Shinonome, 1-Chome, Koto-Ku, Tokyo 135, Japan
T. Morishita
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 10-13 Shinonome, 1-Chome, Koto-Ku, Tokyo 135, Japan
K. Tanabe
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 10-13 Shinonome, 1-Chome, Koto-Ku, Tokyo 135, Japan
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Abstract

c-Axis-oriented (Hg0.9Re0.1)Ba2CaCu2Oy thin films were grown on the (100) plane of SrTiO3 substrates by a so-called two-step process. Transmission electron microscopic observation revealed that, in the film annealed under a higher temperature, some steplike regions appeared at the top layer of SrTiO3 substrate. High-resolution transmission electron microscopic images showed that the lattice parameters in these regions are about 4.05–4.15 Å, being longer than the lattice parameter of SrTiO3. It is supposed that a chemical reaction occurred in these regions, and a phase of (Bax,Sr1−x)(Cuy,Ti1−y)O3δs was formed by partially substituted Ba for Sr and Cu for Ti.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 1 , January 2001 , pp. 256 - 260
Copyright
Copyright © Materials Research Society 2001

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