Results 171 to 180 of about 5,220,379 (199)

Ferroelectric Domain Walls Approaching Morphotropic Phase Boundary

The Journal of Physical Chemistry C, 2017
Domain walls play an important role in tailoring the properties of ferroic materials. We employ a Landau–Ginzburg thermodynamic model to investigate the ferroelectric domain walls around the morphotropic phase boundary (MPB) which contribute to the large piezoelectric response, including 90° domain wall for tetragonal (T) symmetry and 109° and 71 ...
Jinghui Gao, Xinghao Hu, Yongbin Liu, Yan Wang, Xiaoqin Ke, Dong Wang, Lisheng Zhong, Xiaobing Ren   +7 more
openaire   +1 more source

Coupled losses in PZT near the morphotropic phase boundary

Ferroelectrics, 1989
Abstract A set of complex dielectric, piezoelectric and elastic constants of undoped PZT ceramics with various Zr/Ti ratios are measured in a temperature range between 4.2 K and the Curie point. In the imaginary parts there exist pronounced loss peaks below 250 K, of which the height and temperature strongly depend on the c/a ratio.
U. Robels, R. Herbiet, G. Arlt
openaire   +1 more source

The morphotropic phase boundary in PZT solid solutions

Journal of Applied Crystallography, 1980
PbZrxTi1−xO3 ceramics around the morphotropic phase boundary (MPB) have been prepared under different firing conditions using the usual ceramic techniques. The phases of the compounds have been investigated with X-ray diffraction photographs. It has been found that the MPB is not a narrow and vertically straight boundary but a region whose width ...
openaire   +1 more source

Polarizability Across Morphotropic Phase Boundary in Ferroelectric Ceramics

Ferroelectrics, 2010
A two-scale micromechanics scheme is used to analyze domain switching in ferroelectric ceramics during poling. The drastically different polarizability characteristics of Pb(ZrxTi1-x)O3 ceramics across morphotropic phase boundary has been captured, it is demonstrated that a complete poling that exhausts 180° and non-180° domain switching is realistic ...
W. Tang, D. N. Fang, J. Y. Li
openaire   +1 more source

Thermodynamics of Ferroelectric Solid Solutions with Morphotropic Phase Boundaries

Journal of the American Ceramic Society, 2014
A thermodynamic analysis is presented for the diffusionless phase diagrams of ferroelectric solid solutions that display a morphotropic phase boundary (MPB) separating adjacent tetragonal and rhombohedral phases. Equations are developed for the shape of the MPB, the locations of triple and tricritical points, and for the line along which the anisotropy
Adam A. Heitmann, George A. Rossetti
openaire   +1 more source

Thermal Behavior and Phase Transition in PZT near the Morphotropic Phase Boundary

Ferroelectrics, 2002
The heat capacities of single crystals of antiferroelectric PbZrO 3 and PbZr 0.99 Ti 0.01 O 3 , and sol-gel derived ceramics of ferroelectric PbZr 1 m x Ti x O 3 ( x = 0.46, 0.48, and 0.50) were measured by a.c. calorimetry. Only one sharp anomaly at 505.6 K in a PbZrO 3 single crystal showed the paraelectric-antiferroelectric phase transition without ...
T. Yamazaki, A. Onodera, H. Fujishita, Y. Ishikawa, M. Tanaka   +4 more
openaire   +1 more source

Morphotropic Phase Boundary (MPB) Materials-Device Applications

Ferroelectrics, 2002
Ferroelectric (FE) materials, which have a MPB, can have a number of enhanced physical properties because of the proximity in free energy of an alternate FE structure. In view of the importance of the physical properties near MPB, it is proposed to present a very brief review on FE properties near MPB and also different types of MPB compositions ...
openaire   +1 more source

Morphotropic phase boundary in , near

Solid State Communications, 2010
Alok Singh Kandari, Vijendra Lingwal, N.S. Panwar   +2 more
openaire   +1 more source

Enhanced Electrocaloric Effect in Relaxor Ferroelectric Terpolymers by Morphotropic Phase Boundary

Small
Abstract Relaxor ferroelectric terpolymers with a disordered helical relaxor conformation are promising candidates for developing electrocaloric cooling applications. However, most current studies focus on the electrocaloric effect in terpolymers with high chiral commoners, which remains relatively small in the ...
Linxiao Xu, Yutie Gong, Shengfei Tang, Chenyi Li, Huamin Zhou, Yang Liu   +5 more
openaire   +2 more sources

Method to Achieve the Morphotropic Phase Boundary in HfₓZr_(1−x)O₂ by Electric Field Cycling for DRAM Cell Capacitor Applications

IEEE Electron Device Letters, 2021
Wan Sik Hwang, Min Ju Kim, Seongho Kim
exaly