title: Raman spectroscopy and X-ray diffraction studies of stress effects in PbTiO3 thin films.
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.
authors.affiliation: Laboratoire des Matériaux et du Génie Physique (CNRS-INP Grenoble-Minatec), France. ausrine.bartasyte@gmail.com
authors.forename: Ausrine
authors.initials: A
authors.lastname: Bartasyte
authors.forename: Odette
authors.initials: O
authors.lastname: Chaix-Pluchery
authors.forename: Jens
authors.initials: J
authors.lastname: Kreisel
authors.forename: José
authors.initials: J
authors.lastname: Santiso
authors.forename: Samuel
authors.initials: S
authors.lastname: Margueron
authors.forename: Michel
authors.initials: M
authors.lastname: Boudard
authors.forename: Carmen
authors.initials: C
authors.lastname: Jiménez
authors.forename: Adulfas
authors.initials: A
authors.lastname: Abrutis
authors.forename: François
authors.initials: F
authors.lastname: Weiss
mesh_terms: D003198:Computer Simulation; D004548:Elasticity; D007854:Lead / Q000737:chemistry*; D008422:Materials Testing; D008567:Membranes, Artificial; D008956:Models, Chemical; D008958:Models, Molecular; D008968:Molecular Conformation; D013059:Spectrum Analysis, Raman; D013314:Stress, Mechanical; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D008567:Membranes, Artificial; C481719:lead titanate; D007854:Lead; D014025:Titanium