Physics-based models of dynamic
response of piezoceramics
Willatzen, M., Lew Yan Voon, L.C.,
Lassen, B., Melnik, R.
Science and Technology (MS&T) 2006: Materials and Systems, Volume 1,
Proceedings of the Materials Science & Technology Conference and Exhibition,
Duke Energy Center, Cincinnati, OH, USA, Oct 15-19, 2006, ISBN
978-0-470-93154-7, pp. 613--624, 2006
A physics-based model of piezoelectric multilayer systems is presented and
applied to two applications of multilayered structures. The first example is
for one dimensional multilayer ultrasound transducers, including dielectric
losses in the piezoceramic material and mechanical losses in the transducer
material layers. Results are shown for lead zirconate and barium titanate.
The second example discusses the impact of a fully self-consistent treatment
of piezoelectricity and spontaneous polarization in analyzing the device
performance of nanodevices (transistors, lasers) based upon nitride
wide-band-gap semiconductors. We show that different physics could be
operative depending upon the material properties and device design.
Keywords: multilayer systems, piezoelectric effect,
semiconductors, nanodevices, self-consistent solution