scholarly journals Synergy between phase transformation and domain switching in two morphotropic phase boundary ferroelectrics

2018 ◽  
Vol 2 (11) ◽  
Author(s):  
Hui Liu ◽  
Houbing Huang ◽  
Longlong Fan ◽  
Yang Ren ◽  
Hua Zhou ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Domain Switching

Synthesis, piezoelectric property and domain behaviour of the vertically aligned K1−xNaxNbO3 nanowire with a morphotropic phase boundary

2017 ◽  
Vol 5 (3) ◽  
pp. 747-753 ◽  
Author(s):  
Xianghe Meng ◽  
Wen Wang ◽  
Hua Ke ◽  
Jiancun Rao ◽  
Dechang Jia ◽  
...  
Keyword(s):  
Piezoelectric Property ◽  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Domain Switching ◽  
Vertically Aligned

Synthesis of a KNN nanoarray with an MPB and domain switching observable after prepolarization at +8 Volts using PFM equipment.

Polar-Toroidal Phase Transformation in Inhomogeneous Nanoscale Ferroelectric Systems: A Novel Strategy for the Design of Energy Conversion Nanodevices

MRS Advances ◽  
2017 ◽  
Vol 2 (56) ◽  
pp. 3427-3432
Author(s):  
Weijin Chen ◽  
Shuai Yuan ◽  
Ye Ji ◽  
Gelei Jiang ◽  
Jian Shao ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Energy Conversion ◽  
Phase Boundary ◽  
Morphotropic Phase Boundary ◽  
Large Change ◽  
Polarization Field ◽  
Phase Boundaries ◽  
Thermal Fields ◽  
Novel Strategy ◽  
Complex Polarization

ABSTRACTThe ordering of polarization field of inhomogeneous ferroelectric systems were investigated. We found that these systems exhibit rather complex polarization ordering behaviors with the coexistence of polar and toroidal ordering, and particularly, a novel and tunable polar-toroidal phase transformation under external mechanical, electrical or thermal fields. Accompanying with this polar-toroidal phase transformation, there is a large change of polarization and strain. As a result, large eletromechanical and thermomechanical performance can be achieved in these systems. The polar/toroidal phase boundaries can be regarded a new kind of morphotropic phase boundary (MPB). The polar-toroidal phase transformation in nanoscale ferroelectric systems should provide us a novel strategy to develop energy conversion nanodevices.

Morphotropic Phase Boundary in the Nanocrystalline PbZrxTi1-xO3 System

1996 ◽  
Vol 452 ◽  
Author(s):  
R. S. Katiyar ◽  
J. F. Meng
Keyword(s):  
Grain Size ◽  
Phase Transformation ◽  
Phase Boundary ◽  
Raman Spectra ◽  
Morphotropic Phase Boundary ◽  
Size Dependence ◽  
Phonon Mode ◽  
Ferroelectric Phase ◽  
Soft Mode ◽  
Bulk Materials

AbstractMicro Raman spectra for PbZrxTi1-xO3 (PZT) with a grain size of 60 nm have been recorded. The results show that the lowest E(TO) phonon mode of PbTiO3 (soft mode) displays a decrease in frequency and increase in linewidth with increasing Zr concentration. A discontinuous behavior of the phonon energy of the soft mode occurs at x=0.4 and it can be attributed to a phase transformation from the tetragonal ferroelectric to rhombohedral ferroelectric phase in PZT. The coupling between the soft mode and an additional impurity mode, has been observed, which plays an important role in the phase transformation. A lowest phonon mode at 10 cm−1 is detected and it is found to exhibit an increase in intensity for x above 0.2. The grain size dependence of the mode seems to be associated with the effect of grain size on the microstructure in PZT. The mechanism of grain size - induced new morphotropic phase boundary, which is lower than that of the corresponding bulk materials, is discussed.

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