Dresden 2014 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 81: Superconductivity: Properties and Electronic Structure
TT 81.7: Talk
Thursday, April 3, 2014, 11:00–11:15, HSZ 201
Tuning the performance of YBa2Cu3O7−δ thin films by a local incorporation of gold nanoparticles — •Christian Katzer1, Markus Westerhausen1, Claudia Stahl2, Joachim Albrecht3, Evelyn Stilp4, Andreas Suter4, and Frank Schmidl1 — 1Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena, 07743 Jena — 2Max-Planck-Institut für Intelligente Systeme, Heisenbergstraße 3, 70569 Stuttgart — 3Hochschule Aalen, Beethovenstraße 1, 73430 Aalen — 4Laboratory for Muonspin Spectroscopy, PSI, CH-5232 Villigen PSI, Switzerland
Many superconducting thin film applications require a spatially resolved current carrying capability due to different boundary conditions. On the one hand, the critical current density should be increased for high-current applications or in the antenna structures of sensor devices like gradiometers; on the other hand, the critical current of Josephson Junctions must not be too high to ensure a proper functionality. We report that a local incorporation of crystalline gold nanoparticles in YBa2Cu3O7−δ thin films allows engineering the critical current landscape on the sub-micrometre scale. Meanwhile, as we will show the growth conditions of the YBCO are modified, resulting in less a-axis growth and an improved oxygen stoichiometry. Furthermore, we will present Muon Spin Spectroscopy measurements of the London-penetration depth which indicate a reduced defect density in YBCO thin films modified by Au particles.
C. Katzer, et al., Supercond. Sci. Techn. 26, 125008 (2013)
C. Katzer et al., New J. Phys. 15, 113029 (2013)