High critical temperature superconductors in the system La3-ZMezBa3Ca1−vNcvCu7O16+x where Me=a rare earth or alkaline metal ion and Nc is a Mg, Cd ion

Abstract

Compounds of the of the general formula La3−zMezBa3Ca1−vNcvCu7O16+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 TABLE 1 Properties of La3-zMezBa3Ca1-vCu7O16+x Compounds. Lattice Parameter (Å) Onset Compound c α Tc (K.) La3Ba3CaCu7O16+x 11.650 3.865 72 11.680* 80* La3Ba3CaCu7O16+x/LSAT 11.665 La3Ba3CaCu7O16+x/GGG 11.540 La3Ba3CaCu7O16+x/LaAlO3 11.660 35 La2YBa3CaCu7O16+x 11.580 3.850 72 LaY2Ba3CaCu7O16+x 11.630 3.868 74 LaY2Ba3CaCu7O16+x/LSAT 11.703 Nd3Ba3CaCu7O16+x 11.614 3.874 42 Nd3Ba3CaCu7O16+x/LSAT 40 La2YbBa3CaCu7O16+x 11.530 3.843 74 La2YbBa3CaCu7O16+x/LSAT 11.628 45 La2YbBa3CaCu7O16+x/LaAlO3 11.630 La2YbBa3CaCu7O16+x/GGG 11.683 La2.5Na.5Ba3CaCu7O16+x 11.630 3.870 68 La2.5Na.5Ba3CaCu7O16+x/LaAlO3 11.662 65 La2.5Na.5Ba3CaCu7O16+x/GGG 11.664 La3Ba3Ca.5Cd.5Cu7O16+x 11.661 3.881 55 La3Ba3Ca.5Cd.5Cu7O16+x/LSAT 11.720 La3Ba3Ca.5Cd.5Cu7O16+x/LaAlO3 11.265 70 La3Ba3Ca.5Cd.5Cu7O16+x/GGG 11.730 La3Ba3Ca.5Mg.5Cu7O16+x 11.661 3.890 35 La3Ba3Ca.5Mg.5Cu7O16+x/LaAlO3 11.650 La3Ba3Ca.5Mg.5Cu7O16+x/GGG 11.692 ΔTc Observed Compound (K.) Reflections La3Ba3CaCu7O16+x 4 La3Ba3CaCu7O16+x/LSAT 003, 005, 006, 007, 0012 La3Ba3CaCu7O16+x/GGG 003, 005, 006, 007, 009 La3Ba3CaCu7O16+x/LaAlO3 15 003, 004, 005, 006, 007, 009, 0011, 0012 La2YBa3CaCu7O16+x 3 LaY2Ba3CaCu7O16+x 6 LaY2Ba3CaCu7O16+x/LSAT 002, 005, 006, 007 Nd3Ba3CaCu7O16+x Nd3Ba3CaCu7O16+x/LSAT 20 La2YbBa3CaCu7O16+x 5 La2YbBa3CaCu7O16+x/LSAT >20 003, 005, 006, 007, 009, 0010, 0011 La2YbBa3CaCu7O16+x/LaAlO3 003, 005, 006, 007, 008, 009, 0010, 0011 La2YbBa3CaCu7O16+x/GGG 003, 005, 006, 007 La2.5Na.5Ba3CaCu7O16+x 18 [multiphase] La2.5Na.5Ba3CaCu7O16+x/LaAlO3 >40 003, 005, 006, 007 La2.5Na.5Ba3CaCu7O16+x/GGG 006, 009 La3Ba3Ca.5Cd.5Cu7O16+x La3Ba3Ca.5Cd.5Cu7O16+x/LSAT 003, 006 La3Ba3Ca.5Cd.5Cu7O16+x/LaAlO3 >45 003, 006 La3Ba3Ca.5Cd.5Cu7O16+x/GGG La3Ba3Ca.5Mg.5Cu7O16+x 15 La3Ba3Ca.5Mg.5Cu7O16+x/LaAlO3 003, 005, 006, 007, 009, 0010, 0011 La3Ba3Ca.5Mg.5Cu7O16+x/GGG 003, 005, 006, 007, 0011 *S. Engelsberg, Physica C, 176, 451 (1991)

Dependencies are inferred from the claim text.