Electrosciences has co-authored three new scientific peer reviewed papers with a focus on the ferroelectric behaviour of industrially important piezoelectrics: 1) theory and experiment at very low temperatures, 2) how to determine unpoled elastic properties and 3) fatigue effects at low electric fields. Details and links are found here:
|We provide an insight into the switching of near-morphotropic composition of PZT, using molecular dynamics simulations and electrical measurements. The simulations and experiments exhibit qualitatively similar hysteretic behavior of the polarization for different temperatures showing widening of the P-E loops and the decrease in the coercive field toward high temperatures. Remarkably, we have shown that polarization switching at low temperatures occurs via polarization rotation, that is a fundamentally different mechanism from high-temperature switching, which is nucleation driven.||1) J. B. J. Chapman, O. T. Gindele, C. Vecchini, P. Thompson, M. Stewart, M. G. Cain, D. M. Duffy, and A. V. Kimmel, “Low temperature ferroelectric behavior in morphotropic Pb (Zr 1− xTi x)O 3,” Journal of the American Ceramic Society, vol. 5, pp. 1–9, Sep. 2017.|
A new method to determine the un-poled elastic properties of ferroelectric materials.
|2) C. R. Bowen, A. C. Dent, R. Stevens, M. G. Cain, and A. Avent, “A new method to determine the un-poled elastic properties of ferroelectric materials,” Sci. Technol. Adv. Mater., pp. 1–0, Mar. 2017.|
|Schematic diagram of the circuit used to study switching behaviour of ferroelectric bulk samples. A high speed MOSFET was used to switch between a high voltage and ground. Measurement of the voltage across a reference resistor (50 Ω) allows monitoring of the transient current. The load resistance was 300 Ω.||3) T. Buchacher, S. Lepadatu, J. Allam, R. Dorey, and M. G. Cain, “Low field depoling phenomena in soft lead zirconate titanate ferroelectrics,” J Electroceram, pp. 1–7, Dec. 2016.|