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Abstract
The dielectric spectroscopy has been studied for both twisted and helical structures at the same sample. On cooling below the SmA phase the twisted structure spontaneously appeared. The helical structure could be generated by applying electric field of the frequency 20 Hz. It is shown that the twisted structure exhibits higher relaxation frequency and lower dielectric strength than the helical one. This result can be explained within the present theory providing the existence of weak depolarization fields.
