Superconducting oxide films, prepared

Preparation of Superconducting Oxide Films from Metal Trifluoroacetate Solution Precursors... 

Electrical and Electronic Applications. Silver neodecanoate [62804-19-7] has been used in the preparation of a capacitor-end termination composition (110), lead and stannous neodecanoate have been used in circuit-board fabrication (111), and stannous neodecanoate has been used to form patterned semiconductive tin oxide films (112). The silver salt has also been used in the preparation of ceramic superconductors (113). Neodecanoate salts of barium, copper, yttrium, and europium have been used to prepare superconducting films and patterned thin-fHm superconductors. To prepare these materials, the metal salts are deposited on a substrate, then decomposed by heat to give the thin film (114—116) or by a focused beam (electron, ion, or laser) to give the patterned thin film (117,118). The resulting films exhibit superconductivity above Hquid nitrogen temperatures. 

Bhattacharya, R. N. Feldmann, M. Larbalestier, D. Blaugher, R. D. 2001. Electrodeposition process for the preparation of superconducting thallium oxide films. IEEE Trans. Appl. Supercond. 11 3102-3105. 

Suzuki, M., Enomoto, Y. Murakami, T. and Inamura, T., Thin Film Preparation of Superconducting Perovskite-Type Oxides by rf Sputtering. Jpn. J. Appl. Phys. 20(s 20-4) 13 (1981). 

X-ray diffraction patterns of films prepared on YSZ substrates, which have been reacted at 8S0°C for 30 and 60 min, respectively, are shown in Fig. 4(a) and 4(b). The films are annealed in hdium at 920°C for 5 min after the reaction step before slow cooling in oxygen. The major peaks of the pattern correspond to the reflections of the superconducting oxide phase. Unreacted barium fluoride is observed in Fig. 4(a), whereas it is completely absent in Rg. 4(b). An unidentified phase with Bragg... 

Superconducting thin films of k-(ET)2Cu(NCS)2 are prepared by the deposition of ET on a hot substrate (150 to 200°C) coated with indium oxide under 10 to 10 torr at 250°C then electrolyzed in the presence of CuSCN, KSCN, and the crown ether in ethanol. The film shows a Meissner effect with 7(. = 8 K, but in this film, also, no zero resistance is accomplished. ... 

An apparatus for the preparation of pure ozone vapor for use in situ growth of superconducting oxide thin films are designed [151]. Pure condensed ozone is produced from distillation of diluted ozone-oxygen mixture at 77K. The condensed ozone is heated until the pressure of its vapors approaches the necessary for an adequate flow of ozone- gas to the chamber of thin films growth. The thin films from YBa2Cu30, with zero resistance at temperatures of about 85K grow at ozone pressure in the... 

Tertiary bismuthines appear to have a number of uses in synthetic organic chemistry (32), eg, they promote the formation of 1,1,2-trisubstituted cyclopropanes by the iateraction of electron-deficient olefins and dialkyl dibromomalonates (100). They have also been employed for the preparation of thin films (qv) of superconducting bismuth strontium calcium copper oxide (101), as cocatalysts for the polymerization of alkynes (102), as inhibitors of the flammabihty of epoxy resins (103), and for a number of other industrial purposes. 

---