Browsing by Author "Hsu, SS"

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Modification on the surface of superconducting YBa2Cu3O7-x films by microwave plasma-enhanced pulsed laser deposition
(1995-12-15)
Huang, CS
;
Tseng, TY
;
Chung, BC
;
Tsai, CH
;
Hsu, SS
Superconducting YBa2Cu3O7-x films having smooth surfaces were successfully synthesized by a microwave plasma-enhanced pulsed laser deposition (PEPLD) process. Particulates that frequently occurred in films grown by the conventional PLD process were effectively eliminated. The films were epitaxial-like. The c-axis was perpendicular to the films' surface, the a and b axes were aligned in the films' plane, and the onset and zero of the transition temperature were at T-c=90 K and T-c0=86 K, respectively. Optical emission spectroscopy indicated that the presence of oxygen plasma not only reexcited the laser-induced species via the collision process, but also produced abundant atomic oxygen in PEPLD process. The surface reaction kinetics for the formation of the thin-film process was thus greatly enhanced, which substantially improved the thin-film quality. (C) 1995 American Institute of Physics.