work has focused
on relaxor ferroelectric oxides - systems that exhibit a diffuse
dependent transition in their relative permittivity- as well normal
ferroelectric and piezoelectric materials. These materials
have a broad range of applications ranging from capacitors, ultrasonic
medical imaging, to piezoelectric transducers.
how the character of the ferroelectric transition is affected by
in bulk chemistry and cation order.
PMN (lead magnesium niobate) family of relaxors we have
new models for the cation order that permit tailoring of the properties
via new processing schemes. This work has been utilized by
in the first principles modeling of the structure, stability, and
of piezoelectric systems.
We also interact with the
"Center for Piezoelectrics by
Design", a first principles theory group focused on predicting and
understanding ferroelectric and piezoelectric materials. Our
interactions with theorists interested in pre-predicting new
chemistries with potentially enhanced responses has led to the
identification of several new perovskite chemistries.
work has been
funded by the National Science Foundation and by the Office of Naval