X-ray absorption spectroscopy on titanate perovskites at the Ti K edge - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue High Pressure Research Année : 2006

X-ray absorption spectroscopy on titanate perovskites at the Ti K edge

Résumé

The Ti K edge X-ray absorption has been measured under high pressure at room temperature for ATiO3 perovskites (A = Ca, Sr, Ba and Pb). The pre-edge features have been used to determine the local distortion around the Ti atom as a function of applied features. The ferroelectric local instability decreases when pressure is increased (PbTiO3 ) and eventually vanishes at high pressure (BaTiO3 ). The antiferrodistorsive instability remains unchanged under pressure for CaTiO3 and appears above 5 GPa for SrTiO3 . Moreover, it is shown that at room pressure SrTiO3 was locally ferroelectric. A new phase appears for SrTiO3 above 14 GPa with a strong deformation of the oxygen octahedron.
Fichier non déposé

Dates et versions

hal-00132046 , version 1 (20-02-2007)

Identifiants

Citer

J. P. Itie, B. Couzinet, A. C. Dhaussy, A. M. Flank, N. Jaouen, et al.. X-ray absorption spectroscopy on titanate perovskites at the Ti K edge. High Pressure Research, 2006, 26, pp.325-330. ⟨10.1080/08957950601105556⟩. ⟨hal-00132046⟩
126 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More