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Highly-textured thallium-barium-calcium-copper-oxide polycrystalline superconducting films on silver substrates.

机译:银基底上高度织构的铊 - 钡 - 钙 - 铜 - 氧化物多晶超导薄膜。

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Thick (8 to 10 (mu)m) Ba--Ca--Cu--O films have been rf magnetron sputtered onto Ag alloy (Consil 995) substrates. The films were given a post-deposition anneal in an over pressure of Tl in order to form the superconducting phases. Annealing protocols were done which result in predominantly the 1212 and 2212 phases. The substrate orientation was varied to determine its effect on film orientation. Material properties of the films were characterized by x-ray diffraction (XRD), ion beam backscattering spectroscopy, energy dispersive x-ray analysis (EDAX), and scanning electron microscopy (SEM). Electrical characterization of the films was done using dynamic impedance (DI) at 10 kHz and rf surface resistance (R(sub s)) at 18 GHz in a TE(sub 011) fundamental mode cavity. 19 refs., 7 figs. (ERA citation 15:034971)

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