Piezo-ferroelectrics: Pressure-induced phase transitions in Pb(Zr1-xTix)O3 (PZT)

Jérôme Rouquette (1, 2) , Julien Haines (1) , Véronique Bornand (1) , Philippe Papet (1)

1 LPCMC - Laboratoire de physico-chimie de la matière condensée
2 Bayerisches Geoinstitut - Bavarian Research Institute of Experimental Geochemistry and Geophysics

Piezoelectric PZT solid solutions were studied as a function of pressure and temperature. Moderate pressure is found to induce phase transitions to monoclinic phases (Cm,Cc) for Ti-rich PZT, which are the same ferroelectric phases responsible for the high piezoelectric properties of the MPB. The following transformation sequence P4mm -> Cm -> Cc -> F1 -> F-1 was identified upon increasing pressure. Compression behaviour is dominated by: (1) a rotation and a reduction of the spontaneouspolarization and (2) octahedral tilting leading to unit cell doubling. Future studies as a function of pressure, temperature and electric field on single crystals of heterovalent relaxor ferroelectric isotypes of PZT are proposed in order to better understand these potentially technologically-important piezoferroelectric materials.

Mots clés: Pressure; Ferroelectric; PZT

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Jérôme Rouquette, Julien Haines, Véronique Bornand, Philippe Papet. Piezo-ferroelectrics: Pressure-induced phase transitions in Pb(Zr1-xTix)O3 (PZT). Andrzej grzechnik. Pressure-induced phase transitions, Transworld reasearch network, pp.61-74, 2007, Transworld reasearch network. ⟨hal-00185236⟩