ISSN:
1573-7357
Keywords:
74.72.Fq Tl-based compounds 74.76.Bz Superconducting films
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We report on the preparation of 5 μm thick (Tl,Bi)(Ba0.4,Sr1.6)Ca2Cu3O9 ((Tl,Bi)-1223) high Tc films by a modified sol-gel (Pechini) process. The process was performed by the preparation of a gel containing the metallic atoms, the coating of the substrates with the gel, the pyrolisis of the gel, and a post annealing process, without an additional thallium oxide vapour source. X-ray diffraction patterns (θ − 2θ scans) showed that the thick films prepared on LaAlO3(100) substrates consisted mainly of the (Tl,Bi)-1223 phase, with high c axis orientation, and φ scans revealed epitaxial film growth. EDX measurements showed a composition in good agreement with the (Tl,Bi)-1223 phase. Superconductivity was reached with Tc values up to 102 K.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00753885
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