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1. X-Ray Photoemission Spectroscopy Study for the Flat YBa2Cu3OySingle-Crystal Surface Prepared by Chemical Etching and O2Annealing

Author

Hiroshi Uchiyama, Hiroshi Uchiyama, Nobue Tanaka, Nobue Tanaka, Hideaki Zama, Hideaki Zama, Setsuko Tajima, Setsuko Tajima, Tadataka Morishita, Tadataka Morishita, Koichiro Saiki, Koichiro Saiki, and Atsushi Koma, Atsushi Koma

Abstract

The effect of chemical etching with a HCl/methanol solution on a polished sample of single-crystal YBa2Cu3Oy(001) was investigated by emission-angle-dependent X-ray photoemission spectroscopy (XPS). By chemical etching, the extrinsic Ba state in the surface region was removed without the effect of halogen. The bulk state of Y was also restored in the surface by subsequent annealing in an oxygen atmosphere at 400°C.

Published
2000
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