Domain structures in monoclinic Pb[(Zn1/3Nb2/3)0.91Ti0.09] O3 poled single crystals

Alexandra Renault-Laborne (1, 2) , Hichem Dammak (1) , G. Calvarin (1) , M.P. Thi (2) , P. Gaucher (2)

1 SPMS - Laboratoire Structures, Propriétés et Modélisation des solides
2 THALES [France]

A tetragonal (T) ↔ monoclinic (M) phase transition characterized by a wide thermal hysteresis is observed in Pb(Zn1/3Nb2/3)O3-PbTiO3 (PZN-PT) single crystals close to the morphotropic composition PZN-9%PT. The domain structure of crystals, determined by X-ray diffraction and optical observations, is dependent on the poling crystallographic direction. A monoclinic quasi-single domain structure is obtained by poling along the pseudocubic [101] direction whereas an unexpected monoclinic multidomain state with macroscopic 2 mm symmetry can be obtained for [001] poled crystals. Finally it is shown that the largest piezoelectric response corresponds to the monoclinic multidomain state of [001] poled crystals.

Mots clés: Piezoelectricity; Monoclinic phase; Domain engineering; X-ray diffraction; PZN-9%PT single crystal

Domaines: Matériaux

Alexandra Renault-Laborne, Hichem Dammak, G. Calvarin, M.P. Thi, P. Gaucher. Domain structures in monoclinic Pb[(Zn1/3Nb2/3)0.91Ti0.09] O3 poled single crystals. Japanese Journal of Applied Physics, 2002, 41 (6 A), pp.3846-3850. ⟨10.1143/JJAP.41.3846⟩. ⟨hal-02270837⟩