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Dielectric behaviour of the B1 phase

Dielectric measurements on two different samples formed by banana-shaped molecules and showing a B1 phase were carried out. Three relaxation ranges were detected: a very fast intramolecular motion, the fast reorientation about the long axes and a slow collective process. The data are discussed in relation to known X-ray investigations and dielectric results for homologous samples showing the B2 state. The main difference between B1 and B2 is that in B1 no evidence for ferroelectric order in the short range was detected.