1988 年 57 巻 11 号 p. 4011-4020
The complex dielectric constant of hexagonal BaTiO3(h-BT) along the ferroelectric axis has been measured in the frequency range from 103 Hz to 109 Hz. It is found that the specimen cooled in a strong d.c. electric field exhibits resonant-type dielectric dispersions around 1 MHz and 300 MHz both in the phase II (222 K>T>Tc=62 K) and the phase III (Tc>T). The dispersion around 1 MHz does not appear for the specimen cooled without the d.c. electric field. The effect of the field-cooling on these dispersions is discussed in connection with the twin structure expected from a group theoretical consideration. The dielectric anomaly around Tc diminishes in the damped dielectric constant, indicating that the ferroelectric phase transition in h-BT is closely related to an elastic instability.
この記事は最新の被引用情報を取得できません。
