Volume 82, Number 5, June 2008
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||27 May 2008|
Enhanced self-field critical current density of nano-composite YBa2Cu3O7 thin films grown by pulsed-laser deposition
Institut für Angewandte Physik, Johannes-Kepler-Universität - Linz, A-4040 Linz, Austria, EU
2 Department of Engineering and IRC in Superconductivity, University of Cambridge Trumpington Street, Cambridge, CB2 1PZ, UK, EU
Corresponding author: Johannes.Pedarnig@jku.at
Accepted: 7 April 2008
Enhanced self-field critical current density of novel, high-temperature superconducting thin films is reported. Layers are deposited on (001) MgO substrates by laser ablation of YBa2Cu3O(Y-123) ceramics containing Y2Ba4CuMOx (M-2411, M = Ag, Nb, Ru, Zr) nano-particles. The of films depends on the secondary-phase content of the ceramic targets, which was varied between 0 and 15 mol%. Composite layers (2 mol% of Ag-2411 and Nb-2411) exhibit values at 77 K of up to 5.1 MA/cm2, which is 3 to 4 times higher than those observed in films deposited from phase pure Y-123 ceramics. Nb-2411 grows epitaxially in the composite layers and the estimated crystallite size is ∼10 nm.
PACS: 74.78.Bz – High-Tc films / 81.15.Fg – Laser deposition / 68.55.Nq – Composition and phase identification
© EPLA, 2008
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