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; Sen, Kaushik; Khmaladze, Jarji; Mallett, Benjamin P. P.; Yazdi-Rizi, Meghdad; Marsik, Premysl; Das, Saikat; Marozau, Ivan; Uribe-Laverde, Miguel Angel; Andrés Prada, R. de; Strempfer, J.; Döbeli, Max; Biškup, N.; Varela, M.; Mathis, Y.-L.; Bernhard, Christian

doi:10.1088/1361-648X/aa93a6

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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
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

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