Berlin 2012 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 42: Superconductivity: Fabrication, Properties, Electronic Structure
TT 42.11: Talk
Thursday, March 29, 2012, 17:45–18:00, H 3005
Incorporation of self-organised gold nano crystals in YBa2Cu3O7−δ thin films: Modification of superconducting properties — •Christian Katzer1, Peter Michalowski1, Markus Westerhausen1, Stefanie Koch1, Frank Schmidl1, Sebastian Treiber2, Joachim Albrecht3, and Paul Seidel1 — 1Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena, Helmholtzweg 5, 07743 Jena, Deutschland — 2Max-Planck-Institut für Intelligente Systeme, Heisenbergstraße 3, 70569 Stuttgart, Deutschland — 3Hochschule Aalen, Beethovenstraße 1, 73430 Aalen, Deutschland
Using pulsed laser deposition we are able to fabricate and examine Yttrium-Barium-Copper-Oxide (YBCO) thin films of high quality. A particular point of interest thereby is the influence of a pre-deposited gold layer with a well-defined film thickness. During the growth of the YBCO thin film the intermediate gold layer self assembles into crystalline nano particles, which modify the growth conditions and hence the physical properties of the growing YBCO.
We report on the modification of structural and superconducting properties of our YBCO thin films (such as rocking curve widths, critical temperature Tc and critical current density jc) comparing conventional to Au added YBCO. The temperature dependence of the critical current density thereby was determined using transport measurements as well as magneto-optical measurements [1]. Furthermore investigations of the flux noise of our gold modified YBCO films will be presented.
C. Katzer et al., Europhys. Lett. 95 (2011), 68005