Dielectric Dispersion of Pyridinium Tetrafluoroborate Single Crystals
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概要
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Dielectric dispersion studies have been performed on pyridinium tetrafluoroborate single crystals in the frequency range of 300 Hz to 20 MHz. The measurements have been carried out in the temperature range from 190 to 300 K. In the vicinity of the paraelectric-to-ferroelectric phase transition temperature (<I>T</I><SUB>1</SUB>), the process of dielectric critical slowing down was observed. Two Debye-type relaxational modes were observed below the phase transition temperature (<I>T</I><SUB>1</SUB>). The observed dielectric dispersion in the vicinity of <I>T</I><SUB>1</SUB> was analyzed using a model with a single Debye-type relaxation mode, and the dispersion below <I>T</I><SUB>1</SUB> was analyzed using a model with two Debye-type relaxation modes.
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