Broadband control of the viscoelasticity of ferroelectrics via domain switching
We show that the viscoelastic properties of polycrystalline ferroelectric ceramics can be significantly altered over a wide range of mechanical frequencies when domain switching is controlled by cyclic electric fields. The dynamic stiffness of lead zirconate titanate is shown to vary by more than 30%, while damping increases by an order of magnitude. Experimental results are interpreted by the aid of a continuum-mechanics model that captures the nonlinear electro-mechanically coupled material response for the full electric hysteresis.
Additional Information© 2014 AIP Publishing LLC. Received 14 August 2014; accepted 10 October 2014; published online 24 October 2014. We thank Kaushik Bhattacharya for many fruitful discussions. We acknowledge support from United Technologies Research Center and Caltech's Innovation Initiative.
Published - 1.4899055.pdf