Polarization Rotation via a Monoclinic Phase in the Piezoelectric 92%PbZn1/3Nb2/3O3-8%PbTiO3

著者: Beatriz Noheda, D. E. Cox, G. Shirane, S.-E. Park, L. E. Cross, Z. Zhong - Physical Review Letters 2001 被引用: 695

The origin of ultrahigh piezoelectricity in the relaxor ferroelectric ${\mathrm{PbZn}}_{1/3}{\mathrm{Nb}}_{2/3}{\mathrm{O}}_{3}\ensuremath{-}{\mathrm{PbTiO}}_{3}$ was studied with an electric field applied along the [001] direction. The zero-field rhombohedral $R$ phase starts to follow the direct polarization path to tetragonal symmetry via an intermediate monoclinic $M$ phase, but then jumps irreversibly to an alternate path involving a different type of monoclinic distortion. Details of the structure and domain configuration of this novel phase are described. This result suggests that there is a nearby $R\ensuremath{-}M$ phase boundary as found in the $\mathrm{Pb}(\mathrm{Ti},\mathrm{Zr}){\mathrm{O}}_{3}$ system.