Publication
Applied Physics Letters
Paper

Enhancement of optical reflectivity of high Tc superconducting films by ion milling

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Abstract

We report optical reflectivity data of several representative high T c superconducting films before and after ion milling. A significant enhancement of optical reflectivity after ion milling of a few thousand Å is observed. We observed that features associated with a-axis texture vanished after ion milling, resulting in pure c-axis films. This suggests that a-axis grains reside mostly near the surface in post-annealed high Tc superconducting films. The fact that highly oriented c-axis films can be retained even after post-annealing (for raising Tc) may be important for practical applications.

Date

01 Dec 1991

Publication

Applied Physics Letters

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