High-current superconducting Tl1Ba2Ca2Cu3Oy thick films on polycrystalline Ag by spin coating
- 10 July 1995
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 67 (2) , 294-296
- https://doi.org/10.1063/1.114787
Abstract
Thick films of the high‐temperature superconductor Tl1Ba2Ca2Cu3Oy with high current density Jc have been deposited on polycrystalline Ag substrates by a spin‐coating method. The spin‐coated precursor films were annealed in a two‐zone Tl reaction furnace. Film thicknesses ranged from 10 to 30 μm, leading to good total current capabilities. The films have highly‐textured c‐orientation as evidenced by rocking curves with FWHM of 4° for the (006) peak. Scanning electron micrographs revealed a dense, plate‐like layered structure and almost no reaction between the film and the Ag substrate. Values of Jc (77 K) up to 2.5×104 A/cm2 in zero field and more than 1000 A/cm2 in a 1 tesla field (H∥c axis).Keywords
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