Growth and structural characterization of YMnO3 thin films grown by pulsed liquid injection MOCVD on Si and SrTiO3 substrates |
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Authors: | Ionela Iliescu Michel Boudard Stéphane Pignard Laetitia Rapenne Patrick Chaudouët Hervé Roussel |
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Affiliation: | 1. Laboratoire des Matériaux et du Génie Physique (CNRS UMR 5628), Grenoble INP Minatec, 3 parvis Louis Néel, BP 257, 38016 Grenoble Cedex 1, Franceionela.iliescu@grenoble-inp.fr;3. Laboratoire des Matériaux et du Génie Physique (CNRS UMR 5628), Grenoble INP Minatec, 3 parvis Louis Néel, BP 257, 38016 Grenoble Cedex 1, France |
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Abstract: | Optimum parameters for the growing of YMnO3 films by pulsed liquid injection metalorganic chemical vapor deposition have been studied. Si substrates were used for the optimization of the deposition process. X-ray diffraction (XRD) and transmission electron microscopy (TEM) results show that polycrystalline single phase YMnO3 films can be obtained for an optimal ratio of Y and Mn on the injected solution and either amorphous, metastable orthorhombic, and/or hexagonal YMnO3 phases can be obtained depending on the deposition temperature and precursors ratio. In a second stage, YMnO3 films were grown on SrTiO3 substrates. Pure epitaxial orthorhombic YMnO3 phase was confirmed by XRD. The films microstructure, characterized by scanning electron microscopy and TEM, shows a columnar growth. Each columnar grain grows epitaxially with three possible orientations. |
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Keywords: | MOCVD yttrium oxides perovskites thin films TEM |
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