Pulsed laser deposition of Sr 2 FeMoO 6 thin films grown on spark plasma sintered Sr 2 MgWO 6 substrates
| Autor: | Paul A. Salvador, Junling Wang, M Santosh, Ph. Boullay, Gregory S. Rohrer, M. Lacotte, Prahallad Padhan, Ulrike Lüders, D. Pravarthana, Wilfrid Prellier, A. David, Clara Grygiel |
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| Přispěvatelé: | Laboratoire de cristallographie et sciences des matériaux (CRISMAT), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Department of Materials Science and Engineering, National Taiwan University [Taiwan] (NTU), École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Institut de Chimie du CNRS (INC), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), Carnegie Mellon University [Pittsburgh] (CMU), Department of Physics (DoP), Indian Institute of Technology Madras (IIT Madras), School of Materials Science and Engineering [Singapore], Nanyang Technological University [Singapour], Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Acoustics and Ultrasonics Thin films Analytical chemistry Pulsed laser deposition 02 engineering and technology Substrate (electronics) 01 natural sciences Magnetization 0103 physical sciences [CHIM]Chemical Sciences Thin film Perovskite (structure) 010302 applied physics Oxides [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials 13. Climate action [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Curie temperature Grain boundary Crystallite 0210 nano-technology |
| Zdroj: | Journal of Physics D: Applied Physics Journal of Physics D: Applied Physics, IOP Publishing, 2017, 50 (23), pp.235301. ⟨10.1088/1361-6463/aa6e3e⟩ Journal of Physics D: Applied Physics, 2017, 50 (23), pp.235301. ⟨10.1088/1361-6463/aa6e3e⟩ |
| ISSN: | 0022-3727 1361-6463 |
| Popis: | International audience; Sr2FeMoO6 (SFMO) films were deposited on polycrystalline spark plasma synthesized Sr2MgWO6 (SMWO) substrates. Films were grown using pulsed laser deposition at temperatures (T dep) between 720 °C and 820 °C in a vacuum environment of pressure ${{P}_{\text{dep}}}={{10}^{-6}}$ mbar (0.1 mPa); after deposition they were cooled either in a pressure ${{P}_{\text{cool}}}={{P}_{\text{dep}}}$ or ${{P}_{\text{cool}}}={{10}^{-4}}$ mbar (10 mPa) O2. Despite the use of an isostructural substrate, the growth and cooling conditions play the primary role in determining details of the films' structures and properties, similarly to single-crystals. Grazing x-ray and electron back-scatter diffraction indicate that vacuum-cooled films were pure perovskite-structured SFMO exhibiting grain-over-grain growth that aligned the perovskite sub-cells. SrMoO4 impurities were observed in the x-ray patterns for the oxygen-cooled films similarly to single-crystal substrates. Magnetic, electronic and magnetoresistive properties were all a function of growth and cooling environments. The Curie temperature and magnetization of the films increased with T dep up to 800 °C. The vacuum-cooled films had low-resistivities with essentially metallic conductivity (small resistivity increases occurred at low-T), while the conductivity of oxygen-cooled films were consistent with variable range hopping. The oxygen-cooled films had higher low-field magnetoresistance effects at 5 K than the vacuum-cooled films, which seems consistent with SrMoO4 forming at grain boundaries. This work opens the route to tailor the electronic properties by engineering the grain boundaries in thin films. |
| Databáze: | OpenAIRE |
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