Tuning the electrical properties ofLa0.75Ca0.25MnO3thin films by ferroelectric polarization, ferroelectric-field effect, and converse piezoelectric effect

2006 ◽  
Vol 74 (9) ◽  
Author(s):  
R. K. Zheng ◽  
Y. Wang ◽  
J. Wang ◽  
K. S. Wong ◽  
H. L. W. Chan ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Field Effect ◽  
Piezoelectric Effect ◽  
Ferroelectric Polarization ◽  
Converse Piezoelectric Effect

Structural dynamics of PZT thin films at the nanoscale

2005 ◽  
Vol 902 ◽  
Author(s):  
Alexei Grigoriev ◽  
Dal-Hyun Do ◽  
Dong Min Kim ◽  
Chang-Beom Eom ◽  
Bernhard Adams ◽  
...  
Keyword(s):  
Crystal Lattice ◽  
Lattice Distortion ◽  
Piezoelectric Effect ◽  
Polarization Switching ◽  
X Rays ◽  
Time Resolved ◽  
X Ray ◽  
Converse Piezoelectric Effect ◽  
Ferroelectric Capacitors ◽  
Crystal Lattice Distortion

AbstractWhen an electric field is applied to a ferroelectric the crystal lattice spacing changes as a result of the converse piezoelectric effect. Although the piezoelectric effect and polarization switching have been investigated for decades there has been no direct nanosecond-scale visualization of these phenomena in solid crystalline ferroelectrics. Synchrotron x-rays allow the polarization switching and the crystal lattice distortion to be visualized in space and time on scales of hundreds of nanometers and hundreds of picoseconds using ultrafast x-ray microdiffraction. Here we report the polarization switching visualization and polarization domain wall velocities for Pb(Zr0.45Ti0.55)O3 thin film ferroelectric capacitors studied by time-resolved x-ray microdiffraction.

The Displacement Characteristics of Piezoelectric Ceramic Micro Actuators Evaluated by Laser Interferometer

2015 ◽  
Vol 645-646 ◽  
pp. 920-925 ◽  
Author(s):  
Hong Wu ◽  
Long Biao He ◽  
Jing Lin Zhou ◽  
Ping Yang
Keyword(s):  
Piezoelectric Ceramic ◽  
Piezoelectric Coefficient ◽  
Laser Interferometer ◽  
Piezoelectric Effect ◽  
Influence Factors ◽  
Energy Transformation ◽  
Measurement Results ◽  
Loading Sequence ◽  
Converse Piezoelectric Effect ◽  
Key Parameter

Understanding and measuring the displacement characteristics of piezoelectric ceramic with electric field exciting are particularly important. The piezoelectric coefficient d33 as the indication of its displacement characteristics, is the key parameter of its energy transformation. In this paper, the characteristics of two kinds of piezoelectric ceramics, PZT4 and PZT5 were studied by the laser interferometer measurement. The influence factors of d33 were studied, including the frequency and amplitude of the exciting signal, the ways of holding, and the loading sequence. Then the measurement results of piezoelectric ceramic with laser interferometer and the quasi-static method were compared, the results showed they had consistence and the analysis of the piezoelectric coefficient d33 measurement by converse piezoelectric effect and by piezoelectric effect was discussed.

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