Dynamical Dielectric Properties of Ferroelectric Pyridinium Perchlorate and Pyridinium Fluoroborate Crystals(Condensed matter: electronic structure and electric, magnetic, and optical properties)
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概要
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The complex dielectric constants of pyridinium perchlorate C_5NH_6・ClO_4 (PyClO_4) and pyridinium fluoroborate C_5NH_6・BF_4 (PyBF_4) were measured in a frequency range from 45MHz to 20GHz. Typical dielectric relaxations were observed in both crystals. The activation energies for the reorientational motions of pyridinium cations were determined. It was found that the high-frequency dielectric constant ε_∞ in the Cole-Cole arc law shows small but distinct anomalies at the transition temperatures of PyClO_4 and PyBF_4. The origin of the anomalies in ε_∞ may be attributed to the polarization of ClO_4 and BF_4 anions that are distorted from a regular tetrahedron.
- 社団法人日本物理学会の論文
- 2008-02-15
著者
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DEGUCHI Kiyoshi
Department of Materials Science, Shizuoka Institute of Science and Technology
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Deguchi Kiyoshi
Department Of Materials And Life Science Shizuoka Institute Of Science And Technology
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Deguchi Kiyoshi
Department Of Material Science Faculty Of Science Hiroshima University
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