Preparation of Y-Ba-Cu-O thin films by laser evaporation with near-infrared radiation
H Lengfellner; K F Renk; P Fickenscher; W Schindler; H Lengfellner; Inst. fur Angewandte Phys., Regensburg Univ., West Germany; K F Renk; Inst. fur Angewandte Phys., Regensburg Univ., West Germany; P Fickenscher; Inst. fur Angewandte Phys., Regensburg Univ., West Germany; W Schindler; Inst. fur Angewandte Phys., Regensburg Univ., West Germany
Журнал:
Journal of Physics D: Applied Physics
Дата:
1989-02-14
Аннотация:
The authors report preparation of Y-Ba-Cu-O thin films by laser evaporation with near-infrared radiation. Pulsed radiation of a Nd-YAG laser (wavelength 1.06 mu m) was used for evaporation of material from the surface of a YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub> ceramic sample. Thin films, deposited on Al<sub>2</sub>O<sub>3</sub> single-crystal substrates, became conductive after a heat treatment in oxygen atmosphere. One of their films, with a room-temperature resistivity of 1 m Omega cm, showed onset of superconductivity at 100 K and had T<sub>c</sub> values of 94-76 K (90%-10%) for the resistive transition. The films were characterised by RBS analysis, SEM and X-ray diffraction.
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