Pressure-induced rotation of spontaneous polarization in monoclinic and triclinicPbZr0.52Ti0.48O3

Abstract

The morphotropic composition of lead zirconate titanate ͑PZT͒, PbZr 0.52 Ti 0.48 O 3 , was studied as a function of temperature ͑47-310 K͒ and hydrostatic pressure ͑from 0.1 MPa to 7.6 GPa͒ by neutron powder diffraction. Series of monoclinic ͑space groups Cm and Cc͒ and triclinic phases ͑space groups F1 and F1͒ were observed at various points in the P-T phase diagram of PbZr 0.52 Ti 0.48 O 3 . The high-pressure behavior is characterized by two mechanisms, a rotation and reduction of the spontaneous polarization and the onset of octahedral tilting leading to unit cell doubling. The results show that pressure, as in the case of temperature and external electric fields, can induce polarization rotation.

Antiferrodistortive phase transition in pseudorhombohedral (Pb0.94Sr0.06)(Zr0.550Solanki1, Mishra2, Senyshyn3 et al. 2012Phys. Rev. B82130View full textAdd to dashboardCite

“…This discovery of AFD transition below room temperature was subsequently confirmed by several workers [7][8][9][10][11][12][13] .…”

“…The space group of this monoclinic phase was first shown by Hatch et al 18 to be Cc which was subsequently confirmed by others [11][12][13] but an alternative model based on the coexistence of R3c+Cm phases has also been proposed by some workers 8,9 .…”

Multiple high-pressure phase transitions in BiFeO3

“…Ref. [31][32][33]). However, the most striking observation was that the model ferroelectric and simple perovskite PbTiO 3 first reduces its ferroelectricity and becomes cubic but then, unlike commonly thought, becomes again non-cubic with tetragonal phases [12,34,35] through mechanisms involving oxygen octahedra tilting [12] and a theoretically predicted re-entrance of ferroelectricity [34][35][36].…”

Strain on ferroelectric thin films

“…From lead zirconate [55][56][57][58] to lead titanate [59][60][61][62][63] through several intermediate compositions [64][65][66][67][68], PZT has been studied under pressure. Among the numerous interesting results in this field, a high-pressure form of ferroelectricity has been calculated and observed in PbTiO 3 [59,60] at room temperature.…”