A relation between long-range correlation and dielectric anomaly |
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| Authors: | Lei Zhang Weilie Zhong Chunlei Wang Yiping Peng |
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| Institution: | (1) Department of Physics, Shandong University, 250100 Jinan, China |
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| 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.
Project supported by the Climbing Program of Foundamental Research of China. |
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| Keywords: | ferroelectrics multi-site potential dielectric anomaly long-range correlation |
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