High critical temperature superconductors in the system La.sub.3

Superconductor technology: apparatus – material – process – High temperature – per se – Copper containing

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505778, C04B 3550, C04B 35505

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059728450

ABSTRACT:
Compounds of the of the general formula La.sub.3-z Me.sub.z Ba.sub.3 Ca.sub.1-v Nc.sub.v Cu.sub.7 O.sub.16+x, wherein Me can be a rare earth metal or an alkaline metal ion selected from the group consisting of yttrium (Y), ytterbium (Yb), sodium (Na) and Nc can be a 2+ion selected from the group consisting of magnesium (Mg) and cadmium (Cd) have been prepared as the HTSC in thin film superconductors. These compounds can be used as thin film high critical superconductors in thin film high critical temperature superconducting structures and antennas and in multilayered structures and devices such as Josephson junctions, broadband impedance transformers and both flux flow and field effect transistors.

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D.S. Wu et al, 212 Physica C 32 (1996), No Month.
Zhang et al "Supression of Superconductivity in CaLaBaCu.sub.3 Oy . . . " Wuli Xuebao 44(8) 1279-85, Abstract Only, 1995.
Kao et al "Superconductivity in the R3CaBa3Cu7Oy. . . " Mater. Res. Soc. Symp. Proc. 275, pp. 347-351, Abstract only, 1992.

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