Abstract
A double-well potential model is established to explain the dielectric anomaly of ferroelectrics. The dielectric constant consists of two parts. One part is independent of the long-range correlation, following 1/T law. The other part originates from the long-range correlation, and can be described by the correlation length well. The deviation from Curie-Weiss law in a small size sample originates from the decrease of the long-range correlation.
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Project supported by the Climbing Program of Foundamental Research of China.
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Zhang, L., Zhong, W., Wang, C. et al. A relation between long-range correlation and dielectric anomaly. Sci. China Ser. A-Math. 42, 423–428 (1999). https://doi.org/10.1007/BF02874262
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DOI: https://doi.org/10.1007/BF02874262