Bulk and surface dipolar orientation induced by two poling techniques in rolled PVF2 films

Abstract

Dipolar orientation is measured in two kinds of PVF₂ films, the first obtained by successive rolling and poling, and the second by simultaneous rolling and poling. The x‐ray pole figure changes, followed from zero applied field to saturation, show a threshold at a critical field of 300 kV/cm, and are consistent with a 60° switching of the β‐phase molecular dipoles. IR attenuated total reflection shows larger critical fields at the films surfaces; the best dipolar orientation homogeneity is achieved using the simultaneous poling and rolling process.