Abstract
DC field dependence of the dielectric dispersion in the 2/7 phase of betaine calcium chloride dihydrate was measured in the frequency region between 100 Hz and 10 MHz. It was found that there exists a dielectric dispersion, and both the relaxation frequency and the reciprocal strength are proportional to the DC field strength, therefore their ratio is independent of the DC field strength. We discussed these results on the basis of the phenomenological consideration taking the interaction between domain walls into account.
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