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Deposition of barium potassium bismuth oxide (BKBO) thin films by laser ablation

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3 Author(s)
Lacoe, R.C. ; Aerospace Corp., Los Angeles, CA, USA ; Wendt, J.P. ; Adams, P.M.

High-transition-temperature barium potassium bismuth oxide (BKBO) thin films have been deposited by pulsed-laser ablation. The best results were obtained by ablating from a potassium-rich single target in a pure argon background onto [100] SrTiO/sub 3/ substrates. Films with superconducting onset and zero-resistance temperatures of 28.5 and 27.5 K, respectively, were routinely obtained, with room-temperature resistivity as low as 250 mu Omega -cm. X-ray diffraction analysis showed the films were single crystal and epitaxially oriented in the [100] direction. X-ray rocking curves of the BKBO [200] reflection revealed a full width at half maximum of approximately 0.7 degrees Delta theta and indicated that the BKBO [100] lattice direction was misoriented with respect to that of the SrTiO/sub 3/ substrate by 0.13 degrees .<>

Published in:

Applied Superconductivity, IEEE Transactions on  (Volume:3 ,  Issue: 1 )

Date of Publication:

March 1993

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