Two-dimensional superstructure in the (001) plane of Bi2[Ca,Sr]3Cu2O8+δ thin films
- 1 August 1988
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 53 (5) , 426-428
- https://doi.org/10.1063/1.100610
Abstract
Thin films of Bi‐Ca‐Sr‐Cu‐O showing superconductivity above 100 K have been made by electron beam evaporation with oxygen post‐annealing. The major superconducting phase, Bi2[Ca,Sr]3Cu2O8+δ (Tc ∼85 K), is oriented epitaxially with the (100)SrTiO3 substrate. In addition to the one‐dimensional incommensurate superstructure along the b axis, which is characteristic of this phase, we have observed by transmission electron microscopy a two‐dimensional incommensurate superstructure in the a‐b plane with a different periodicity and a different orientation relationship to the subcell.Keywords
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