Highly oriented Tl2Ba2Ca2Cu3O10 thin films by pulsed laser evaporation
- 20 February 1989
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 54 (8) , 760-762
- https://doi.org/10.1063/1.101473
Abstract
We have fabricated superconducting thin films on MgO(100) substrates with nearly pure Tl2Ba2Ca2Cu3O10 (2:2:2:3) phase using pulsed laser evaporation and post‐annealing. The films had c axes perpendicular to the substrates. Superconducting films with onset temperatures of 125 K and zero resistance at 110 K were obtained. X‐ray microprobe fluorescence measurements indicate that a typical composition of films is Tl0.66Ba1.77Ca1.46Cu3Ox, which is low in Tl compared to that expected for the 2:2:2:3 phase. A typical grain size is greater than 10 μm as revealed by scanning electron microscopy.Keywords
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