High spatial resolution of permanent polarization distributions in ferroelectric samples using a combination of PWP and LIMM measurements

The LIMM and PWP methods are well known methods which allow for non-destructive determination of the homogeneity of the permanent polarization distribution inside dielectric samples. In this paper, LIMM and PWP measurements made on PVDF, ceramic and copolymer samples are reported and electronic instrumental corrections are presented. We clearly observe a non-polarized area near the surfaces and different spatial distributions of polarization inside the samples. Simulations based on LIMM and PWP data lead to a better determination of the polarization profile throughout the sample, with increased resolution.