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

Citation
Xj. Wu et al., Chemical reaction at the interface between (Hg0.9Re0.1)Ba2CaCu2Oy thin film and SrTiO3 substrate, J MATER RES, 16(1), 2001, pp. 256-260
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS RESEARCH
ISSN journal
08842914 → ACNP
Volume
16
Issue
1
Year of publication
2001
Pages
256 - 260
Database
ISI
SICI code
0884-2914(200101)16:1<256:CRATIB>2.0.ZU;2-D
Abstract
c-Axis-oriented (Hg0.9Re0.1)Ba2CaCu2Oy thin films were grown on the (100) p lane of SrTiO3 substrates by a so-called two-step process. Transmission ele ctron microscopic observation revealed that, in the film annealed under a h igher temperature, some steplike regions appeared at the top layer of SrTiO 3 substrate. High-resolution transmission electron microscopic images showe d that the lattice parameters in these regions are about 4.05-4.15 Angstrom , being longer than the lattice parameter of SrTiO3. It is supposed that a chemical reaction occurred in these regions, and a phase of (Ba-x,Sr1-x)(Cu -y,Ti1-y)O3-delta was formed by partially substituted Ba for Sr and Cu for Ti.