Ferroelectricity in 3C_6H_4(OH)_2.CH_3OH

概要

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The pyroelectric charge of 3C.H.(OH).?CH.OH was measured after poling thecrystal. It was found that the crystal becomes ferroelectric below the phase transitionpoint, T.=63.7 K, and has spot?taneous polarization along the c axis with a value of6.15 X 10 ' qC/cm' at 20 K. The dielectric constant was measured at a frequency of330 Hz along the a and c axes. The dielectric constant along tlte c axis, e., shows abroad peak with a value of about 230 at a temperature, T.-l-9.S K, with a remarkabledeviation from the Curie-Weiss law. No dielectric loss was found at 330 Hz above orbelow T It was determined b3' both X-ray and piezoelectric examinations that thecrystal at room temperature belongs to the space group of /?3 with the unit cellparameters a= 16.625 A and c=5.566 A.3C,H.(OH).?CH.0H, /l'-quiuaol-methanol clathrate compound, dielectric con-slant, ferroelectric
社団法人日本物理学会の論文
1990-04-15