Automated system for electrical field-polarization studies in ferroelectrics.
An automated system for measuring dielectric polarization as a function of applied electric field and time has been developed. This system, which is based on the Sawyer-Tower technique for obtaining ferroelectric hysteresis loops, is built around a programmable high-voltage power supply and an automatic data acquisition system, both commercially available. The system can be used for obtaining well-resolved hysteresis loops at rates approaching 10 Hz, and also for measuring the time dependent response to steps in electric field with resolution on the order of 2 ms. Examples of data obtained on a ferroelectric ceramic material are presented.
Yarberry
V R
VR
Sandia Laboratories, Albuquerque, New Mexico 87185.
Fritz
I J
IJ