Raman spectroscopy and X-ray diffraction studies of stress effects in PbTiO3 thin films |
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Authors: | Bartasyte Ausrine Chaix-Pluchery Odette Kreisel Jens Santiso José Margueron Samuel Boudard Michel Jiménez Carmen Abrutis Adulfas Weiss François |
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Affiliation: | Laboratoire des Matériaux et du Génie Physique (CNRS-INP Grenoble-Minatec), France. ausrine.bartasyte@gmail.com |
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Abstract: | A systematic study of domain structure and residual stress evolution with film thickness and of phase transition in c/a epitaxial PbTiO(3)/LaAlO(3) films using X-ray diffraction and Raman spectroscopy is reported. Both techniques revealed that the films are under tensile residual stress in the film plane and that a-domains are more stressed than c-domains. The two components of the large A(1)(TO) Ramanmodes are associated with a- and c-domains and their intensity ratio correlates to the volume fraction of a-domains. The evolution of the Raman signature with temperature revealed that the spectrum of a-domains disappears around 480 degrees C, whereas c-domains present an anomaly in their spectrum at 500 degrees C but maintain a well-defined Raman signature up to 600 degrees C. |
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