Stability of the polydomain state in epitaxial ferroelectric PbTiO3 films

Ausrine Bartasyte (1) , B. Dkhil (2) , Jens Kreisel (1) , J. Chevreul (2) , Odette Chaix-Pluchery (1) , L. Rapenne-Homand (1) , Carmen Jiménez (1) , Adulfas Abrutis (3) , François Weiss (1)

1 LMGP - Laboratoire des matériaux et du génie physique
2 SPMS - Laboratoire Structures, Propriétés et Modélisation des solides
3 Department of General and Inorganic Chemistry [Vilnius]

Phase transitions and domain state transformations in a 250 nm thick PbTiO3/SrTiO3 film with c/a/c/a domain structure were investigated by temperature-dependent X-ray diffraction and Raman spectroscopy. Both techniques provide evidence that the film remains tetragonal up to 650 ˚C while the bulk sample becomes cubic at 490 °C. Small anomalies in the width of both Bragg peaks and in Raman modes suggest a subtle structural rearrangement around 500 ˚C.

Mots clés: PbTiO3 films on SrTiO3; temperature-dependent X-ray diffraction; temperature-dependent Raman spectroscopy; structural transformations

Domaines: Matériaux

Ausrine Bartasyte, B. Dkhil, Jens Kreisel, J. Chevreul, Odette Chaix-Pluchery, et al.. Stability of the polydomain state in epitaxial ferroelectric PbTiO3 films. Applied Physics Letters, 2008, 93, pp.242907. ⟨10.1063/1.3046787⟩. ⟨hal-00411750⟩