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Proceedings Paper

Oxygen nonstoichiometry of MBE-grown cuprate films to lose or give high-Tc superconductivity
Author(s): Michio Naito; Hisashi Sato; Hideki Yamamoto
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Paper Abstract

This paper describes our recent progress in MBE growth and the surface/interface investigation of high-Tc superconducting films. The careful XPS analyses of the in-situ surface and interface reaction for MBE grown (Nd,Ce)2CuO4 films demonstrate that correct oxygen stoichiometry is the most crucial issue in preparing high-quality films and improving the characteristics of tunnel junctions. In other words, oxygen nonstoichiometry easily occurs at the surface or interface in cuprates. By utilizing this fact in a positive way, we have succeeded in preparing of the highest quality La2CuO4+(delta ) films ever and have discovered a new superconducting Ba2CuO4-(delta ) film by a simple and efficient oxidation process using ozone in a vacuum chamber.

Paper Details

Date Published: 22 December 1998
PDF: 12 pages
Proc. SPIE 3481, Superconducting and Related Oxides: Physics and Nanoengineering III, (22 December 1998); doi: 10.1117/12.335878
Show Author Affiliations
Michio Naito, NTT Basic Research Labs. (Japan)
Hisashi Sato, NTT Basic Research Labs. (Japan)
Hideki Yamamoto, NTT Basic Research Labs. (Japan)

Published in SPIE Proceedings Vol. 3481:
Superconducting and Related Oxides: Physics and Nanoengineering III
Davor Pavuna; Ivan Bozovic, Editor(s)

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