Physical Approach to Ferroelectric Impedance Spectroscopy: The Rayleigh Element

Authors

T. Schenk, M. Hoffmann, M. Pesic, M.H. Park, C. Richter, U. Schroeder, and T. Mikolajick

Reference

Physical Review Applied, vol. 10, no. 6, art. no. 064004, 2018

Description

The Rayleigh law describes the linear dependence of the permittivity of a ferroelectric on the applied ac electric field amplitude due to irreversible motions of domain walls. We show that this gives rise to a new equivalent-circuit element predestined to fit the impedance spectra of ferroelectrics based on an accepted physical model. Such impedance spectroscopy is a powerful tool to obtain a dielectric and resistive representation of the entire sample structure. The superiority of the Rayleigh analysis based on impedance spectroscopy compared to the common single-frequency approach is demonstrated for a ferroelectric Si : HfO2 thin film.

Link

doi:10.1103/PhysRevApplied.10.064004