Berlin 2008 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 15: Superconductivity: Poster Session
TT 15.5: Poster
Dienstag, 26. Februar 2008, 14:00–18:00, Poster B
Preparation and Characterization of YBa2Cu3O7/ PrBa2Cu3O7 Superlattices — •Ayman El Tahan, Gerhard Jakob, and Hermann Adrian — Institute of Physics, University of Mainz, 55099 Mainz
High Tc superconductor/insulator superlattices offer the possibility to create artificial superconductors with variable strength of the interlayer Josephson coupling. We want to investigate the interlayer coupling strength by measuring the transport properties perpendicular to the layers.
Our presented films are prepared from stoichiometric targets by high pressure sputter deposition in pure oxygen atmosphere. As substrates we used (100) oriented SrTiO3 and LaAlO3. Using x-ray diffraction we confirmed the c-axis oriented epitaxial growth of the superlattices. The superlattice quality is determined by comparison to simulated diffractograms using the program SUPREX. AC magnetic susceptibility was used for characterization of the critical temperature for our YBa2Cu3O7 samples and YBa2Cu3O7/PrBa2Cu3O7 superlattices.
Financial support by the MWFZ Mainz and the government of Egypt is gratefully acknowledged.