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-de structive determination of the homogeneity of the permanent polarizati on 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 obs erve a non-polarized area near the surfaces and different spatial dist ributions of polarization inside the samples. Simulations based on LIM M and PWP data lead to a better determination of the polarization prof ile throughout the sample, with increased resolution.