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
- Marsik, 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
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 306287
- DOI 10.1088/1361-648X/aa93a6
- Persistent URL
- https://folia.unifr.ch/unifr/documents/306246
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