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

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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.