Properties of the electron-doped infinite-layer superconductor Sr1xLaxCuO2 epitaxially grown by pulsed laser deposition

J. Tomaschko, V. Leca, T. Selistrovski, S. Diebold, J. Jochum, R. Kleiner, and D. Koelle
Phys. Rev. B 85, 024519 – Published 11 January 2012

Abstract

Thin films of the electron-doped infinite-layer cuprate superconductor Sr1xLaxCuO2 (SLCO) with doping x0.15 were grown by means of pulsed laser deposition. (001)-oriented KTaO3 and SrTiO3 single crystals were used as substrates. In case of SrTiO3, a BaTiO3 thin film was deposited prior to SLCO, acting as buffer layer providing tensile strain to the SLCO film. To induce superconductivity, the as-grown films were annealed under reducing conditions, which will be described in detail. The films were characterized by reflection high-energy electron diffraction, atomic force microscopy, x-ray diffraction, Rutherford backscattering spectroscopy, and electric transport measurements at temperatures down to T=4.2K. We discuss in detail the influence of different process parameters on the final film properties.

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  • Received 20 December 2011

DOI:https://doi.org/10.1103/PhysRevB.85.024519

©2012 American Physical Society

Authors & Affiliations

J. Tomaschko1, V. Leca1,2,3,*, T. Selistrovski1, S. Diebold1, J. Jochum1, R. Kleiner1, and D. Koelle1

  • 1Physikalisches Institut and Center for Collective Quantum Phenomena in LISA+, Universität Tübingen, Auf der Morgenstelle 14, DE-72076 Tübingen, Germany
  • 2National Institute for Research and Development in Microtechnologies, Erou Iancu Nicolae Str. 126 A, RO-077190, Bucharest, Romania
  • 3Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Gheorghe Polizu Str. 1-7, RO-011061, Bucharest, Romania

  • *leca@uni-tuebingen.de

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Vol. 85, Iss. 2 — 1 January 2012

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