J. Phys. IV France 126 (2005) 59-63
New aspects in the (x-P-T) phase diagram of Pb(Zr Tix)O materials (PZT)J. Rouquette, J. Haines, V. Bornand, M. Pintard and Ph. Papet
Laboratoire de Physico-Chimie de la Matière Condensée, UMR CNRS 5617, Université Montpellier II, Place Eugène Bataillon, cc003, 34095 Montpellier Cedex 5, France
PZT solid solutions were studied as a function of pressure and temperature by neutron and x-ray diffraction, Raman spectroscopy and dielectric measurements. Pressure was found to favour low-symmetry structures (Cm, Cc, F1, characterized by a rotation and a reduction of the spontaneous polarisation and by the tilting of (Zr,Ti)O6 octahedra leading to unit cell doubling (except Cm space group). Additionally, our results show that for Ti-rich PZT, high pressures stabilize the ferroelectric monoclinic phases responsible for the high piezoelectric properties of the MPB composition.
© EDP Sciences 2005