Journal article

Structural, magnetic and electronic properties of pulsed-laser-deposition grown SrFeO 3− δ thin films and SrFeO 3− δ /La 2/3 Ca 1/3 MnO 3 multilayers

  • Perret, Edith University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
  • Sen, Kaushik University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
  • Khmaladze, Jarji University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
  • Mallett, Benjamin P. P. University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
  • Yazdi-Rizi, Meghdad University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
  • Maršík, Premysl University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
  • Das, Saikat University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
  • Marozau, Ivan University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
  • Uribe-Laverde, Miguel Angel University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland - Present affiliation: Applied Physics and Mathematics Group, Faculty of Engineering, Universidad de La Sabana, Chía, Colombia
  • Andrés Prada, R. de University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland - Department of Physics, Stockholm University, Albanova University Center, Stockholm, Sweden
  • Strempfer, J. Deutsches Elektronen-Synchrotron, Hamburg, Germany
  • Döbeli, Max Laboratory of Ion Beam Physics, ETH Zurich, Switzerland
  • Biškup, N. Departamento de Física de Materiales, Facultad de Físicas and Instituto Pluridisciplinar, Universidad Complutense de Madrid, Spain
  • Varela, M. Departamento de Física de Materiales, Facultad de Físicas and Instituto Pluridisciplinar, Universidad Complutense de Madrid, Spain
  • Mathis, Y.-L. Synchrotron Facility ANKA, Karlsruhe Institute of Technology, D-76344 Eggenstein—Leopoldshafen, Germany
  • Bernhard, Christian University of Fribourg, Department of Physics and Fribourg Center for Nanomaterials, Switzerland
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    14.11.2017
Published in:
  • Journal of Physics: Condensed Matter. - 2017, vol. 29, no. 49, p. 495601
English We studied the structural, magnetic and electronic properties of ${\rm SrFeO}_{3- \delta}$ (SFO) thin films and ${\rm SrFeO}_{3-\delta}$ /${\rm La}_{2/3}$ ${\rm Ca}_{1/3}$ MnO3 (LCMO) superlattices that have been grown with pulsed laser deposition (PLD) on ${\rm La}_{0.3}$ ${\rm Sr}_{0.7}$ ${\rm Al}_{0.65}$ ${\rm Ta}_{0.35}$ ${\rm O}_{3}$ (LSAT) substrates. X-ray reflectometry and scanning transmission electron microscopy (STEM) confirm the high structural quality of the films and flat and atomically sharp interfaces of the superlattices. The STEM data also reveal a difference in the interfacial layer stacking with a SrO layer at the LCMO/SFO and a LaO layer at the SFO/LCMO interfaces along the PLD growth direction. The x- ray diffraction (XRD) data suggest that the as grown SFO films and SFO/LCMO superlattices have an oxygen-deficient ${\rm SrFeO}_{3-\delta}$ structure with I4/ mmm space group symmetry ($\delta\leqslant 0.2$ ). Subsequent ozone annealed SFO films are consistent with an almost oxygen stoichiometric structure ($\delta \approx 0$ ). The electronic and magnetic properties of these SFO films are similar to the ones of corresponding single crystals. In particular, the as grown ${\rm SrFeO}_{3- \delta}$ films are insulating whereas the ozone annealed films are metallic. The magneto-resistance effects of the as grown SFO films have a similar magnitude as in the single crystals, but extend over a much wider temperature range. Last but not least, for the SFO/LCMO superlattices we observe a rather large exchange bias effect that varies as a function of the cooling field.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/306246
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