Critical Role of Monoclinic Polarization Rotation in High-Performance Perovskite Piezoelectric Materials

Structural and electrical properties of ZnO‐modified (1−x)Pb(Mg1/3Nb2/3)O3−xPbTiO3 ceramics with wide MPB regions

“…(b) The Mc phase in ferroelectric materials usually serves as an intermediate state during the polarization rotation between tetragonal and rhombohedral phases, and it plays an important role in Pb‐based ceramics with excellent properties. However, the Mc phase in ceramics usually appears by loading electric field . In our work, by introducing ZnO to PMN‐ x PT ceramics, the Mc phases can be confirmed by Rietveld XRD analysis from the unpoled samples, indicating that the Mc phase is probably stabilized, which may provide some novel insights into promoting fundamental research in terms of the relationship between the structure and properties of Pb‐based ceramics.…”

“…Accordingly, it is interesting and necessary to broaden the MPB region of the PMN‐ x PT system from the viewpoints of either science or application. In our opinion, it is possible to broaden the MPB region of PMN‐ x PT because other reports postulate a monoclinic (M) phase, which serves as an intermediate phase between the R and T phases, in the MPB region . This outcome implies that, if the R→M or T→M phase transition near the MPB regions occurs through composition or structural design, the MPB region can be broadened.…”

Extrinsic contributions to piezoelectric Rayleigh behavior in morphotropic PbTiO3 - BiScO3

“…Therefore, the plane normal being measured is considered approximately parallel to the direction of the applied electric field in the vertical direction of the detector, ϕ =0° (equivalently in the horizontal direction, ϕ = π/2 represents the sample response perpendicular to the electric field direction) [4][5][6][7][8][9][10][11][12][13][14]28]. Due to the symmetric nature of the diffraction data, any of the four quadrants of sample directions of a poled polycrystalline ceramic ideally should yield equivalent results.…”

“…The intrinsic effects, associated with contributions from the crystal lattice, include polarization vector rotation between miniaturized domains of the crystal symmetries coexisting at the MPB, and lattice distortion under an external stimulus. Recently, a systematic study by Liu et al [7] has demonstrated that the type of electricfield-induced polarization rotation in the monoclinic phase plays an important role in the high piezoelectric properties. On the other hand, extrinsic contributions are shown to be mainly due to domain wall motion [8][9][10][11][12][13][14][15].…”

Scaling behavior of dynamic hysteresis of PMN‐PT relaxor ferroelectric ceramics near the morphotropic phase boundary

“…Specifically, the MPB with the coexistence of tetragonal ( T ) and rhombohedral ( R ) phases was first proposed in the composition of 0.31 ≤ x ≤ 0.35 . After that, intermediate monoclinic phases, eg M C type monoclinic with Pm space group and M B with Cm space group, were discovered in MPB regions, which were believed to be the bridge of the phase transition from the rhombohedral to the tetragonal . Furthermore, the powder neutron diffraction study carried out by Pandey et al indicated that there is a successive phase transformation from the M B monoclinic to the M c monoclinic to the tetragonal at room temperature with increasing PT content near the MPB in PMN‐PT ceramics.…”