Thin films of Co1.7Fe1.3O4 prepared by radio frequency sputtering - the first step towards their spinodal decomposition
| Autor: | Hoa Le Trong, Lionel Presmanes, Antoine Barnabé, Thi Mai Anh Bui, Philippe Tailhades, Corine Bonningue |
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| Přispěvatelé: | Centre interuniversitaire de recherche et d'ingenierie des matériaux (CIRIMAT), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC), University of Transport and Communications - UTC (VIETNAM), University of Transport and Communications [Hanoi] (UTC), University of Sciences [Ho Chi Minh City] (HCMC), Ho Chi Minh City University of Science (HCMUS), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE) |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Spinodal
Materials science Annealing (metallurgy) Spinodal decomposition Matériaux Analytical chemistry Magnonic crystals Mineralogy 02 engineering and technology Spinel oxides engineering.material 01 natural sciences Sputerring [SPI.MAT]Engineering Sciences [physics]/Materials symbols.namesake 0103 physical sciences General Materials Science Thin film 010302 applied physics Spinel Sputtering General Chemistry [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Phase transformation Ferrimagnetic films Transmission electron microscopy engineering symbols Iron cobaltites Crystallite 0210 nano-technology Raman spectroscopy |
| Zdroj: | CrystEngComm CrystEngComm, Royal Society of Chemistry, 2014, pp. 3359-3365. ⟨10.1039/c3ce42588f⟩ |
| ISSN: | 1466-8033 |
| Popis: | International audience; Pure thin films of Co1.7Fe1.3O4 spinel iron cobaltites were prepared for the first time by radio frequency sputtering. Such films are made of small crystallites of about 20 to 30 nm in diameter. Because Co1.7Fe1.3O4 films have a composition located in the miscibility gap of Fe3O4-Co3O4, they can be submitted to spinodal transformation below about 900 °C. This transformation was also confirmed at 600 °C by X-ray diffraction and transmission electron microscopy studies. It was demonstrated however that this spinodal transformation occurs after only a few hours at low temperature. Indeed, after annealing in air at 300 to 450 °C for a few hours, the spinodal transformation leading to two-phase spinels, one rich in iron and the other rich in cobalt, was clearly revealed by Raman spectroscopy and electrical measurements. |
| Databáze: | OpenAIRE |
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