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Proceedings Paper

Preparation And Characterization Of Pulsed Laser Deposited HTSC Films
Author(s): L. Schultz; B. Roas; P. Schmitt; G. Endres
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Paper Abstract

High Tc superconductor films were prepared by laser deposition. Epitaxial YBaCuO films with high critical current density are obtained for a uniform laser beam energy density of about 4 J/cm2, a substrate temperature above 730°C and an oxygen pressure of 0.3 to 0.5 mbar. Using identical parameters, LaA103 interlayers grow epitaxially on the YBaCuO films and can therefore be used as insulating layers in multi-layer structures. For the Bi(Pb)SrCaCuO system, both the 80 K and the 110 K phase can be prepared in-situ with inductively measured 111's of 77 K and 80 K, respectively. A subsequent annealing step improves these values. For the 110 K phase a Tc(R = 0) of 98 K was obtained. Whereas the critical current densities in the Bi(Pb)SrCaCuO films must still be improved, the epitaxial YBaCuO films show high critical current densities as 5 x 106 A/cm2 at 77 K and zero field or 5 x 107 A/cm2 at 4.2 K and 7 T (for the magnetic field in the film plane). The critical current densities are affected by defects introduced by ion irradiation.

Paper Details

Date Published: 19 March 1990
PDF: 12 pages
Proc. SPIE 1187, Processing of Films for High Tc Superconducting Electronics, (19 March 1990); doi: 10.1117/12.965161
Show Author Affiliations
L. Schultz, Siemens AG (Germany)
B. Roas, Siemens AG (Germany)
P. Schmitt, Siemens AG (Germany)
G. Endres, Siemens AG (Germany)

Published in SPIE Proceedings Vol. 1187:
Processing of Films for High Tc Superconducting Electronics
T. Venkatesan, Editor(s)

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