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TT: Fachverband Tiefe Temperaturen
TT 33: Superconductivity, Measuring Devices, Matter at Low Temperature: Poster Session
TT 33.40: Poster
Mittwoch, 28. März 2012, 15:00–19:00, Poster B
Thin film YBa2Cu3O7 junctions with La2/3Ca1/3MnO3 barrier — •Matthias Hepting, Andreas Stöhr, Robert Werner, Reinhold Kleiner, and Dieter Koelle — Physikalisches Institut – Experimentalphysik II and Center for Collective Quantum Phenomena in LISA+, Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen, Germany
We report on the fabrication and electric transport properties of thin film YBa2Cu3O7 (YBCO) junctions with La2/3Ca1/3MnO3 (LCMO) barrier. Heteroepitaxial YBCO/LCMO/YBCO multilayers were grown in-situ by pulsed laser deposition and subsequently patterned by photolithography and Ar ion milling to form rectangular junctions with typical area 5 µm × 30 µm. A self-alignment process was used for electrical contact via an Au wiring layer to the upper YBCO electrode, smilarly as decribed in [1]. Samples were characterized at temperature T=4.2 K either in magnetically shielded environment or in in-plane magnetic fields B up to the Tesla range. We will present and discuss current-voltage-characteristics and measurements of critical current vs B.
J. Tomaschko et al., Phys. Rev. B 84, 064521 (2011).