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APPLIED PHYSICS LETTERS
Volume 95, Issue 19, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3259922
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Ba(Fe1-xCo2)(2)As-2 superconducting thin films have. been grown on SrTiO3, (La, Sr)(Al, Ta)O-3, LaAlO3, and YAlO3 (YAO) single crystal substrates by pulsed laser deposition. All the films, except on YAO. have been grown epitaxially without buffer layers. The films deposited on YAO contained 45 degrees in-plane rotated grains and showed a broad superconducting transition. The onset T-c of the films is observed to increase from 16.2 to 24 5 K. with increasing c/a. mainly due to a slight distortion of the AsFe4 tetrahedron. From this correlation, we expect that higher superconducting transition temperatures than 24.5 K in a strained epitaxial film may be possible. (C) 2009 American Institute of Physics. [doi:10.1063/1.3259922]
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