The enhancement of superconducting YBa2Cu30 7-x thin films by electric field application during deposition
Date
2009
Authors
Hardie G.L.
Buttner U.
Perold W.J.
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Abstract
The effect of applying a high electric field in-situ during the deposition and growth of YBa2Cu307-x (YBCO) thin films is investigated. The YBCO films are deposited from a stoichiometric YBCO target by pulsed laser deposition (PLD) on (100) MgO single crystal substrates at 726 ° C, in an Oxygen atmosphere. The electric field is generated by applying an electric potential to a metal electrode placed in close proximity to the surface of the substrate. The substrate and deposition chamber are grounded. Proper insulation of the electrode is extremely important in order to avoid arc discharge in the deposition chamber. The quality of the YBCO thin films grown was enhanced by the application of the electric field. These thin films showed higher superconducting transition temperatures and narrower transition widths. This technique can therefore prove useful for producing high quality thin films needed for junctions and multilayer devices. © 2009 IEEE.
Description
Keywords
Arc discharge, Close proximity, Deposition chambers, High electric fields, High quality, In-situ, Metal electrodes, MgO single crystals, Multi-layer devices, Oxygen atmosphere, Thin-film, Transition widths, YBCO, YBCO film, YBCO thin film, Electric discharges, Electric field measurement, Electric fields, Electric potential, Film preparation, Lasers, Multilayer films, Oxygen, Pulsed laser deposition, Single crystals, Substrates, Superconducting films, Superconducting transition temperature, Superconductivity, Thin film devices, Thin films, Yttrium barium copper oxides, Deposition
Citation
IEEE Transactions on Applied Superconductivity
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