M. A. Breazeale
Jeongkwan Na
Natl. Ctr. for Phys. Acoust., Univ. of Mississippi, University, MS 38677
Dept. of Phys., Univ. of Tennessee, Knoxville, TN 37996-1200
The ceramic PZT often is used as a transducer. It can be polarized by raising the temperature above the Curie temperature and applying an electric field. It has exhibited many anomalous physical properties, however, and its nonlinearity is no exception. An increase in the nonlinearity parameter of two orders of magnitude near the Curie temperature and a frequency dependence even at room temperature have been observed. Such behavior is different from that of any solid that has been measured. Measurements of the anomalous nonlinear behavior of PZT are presented and mention is made of some technological implications of this behavior. [Research supported by Murata Corp.]