強誘電体薄膜の分域反転特性に関する基礎的研究

概要

論文の詳細を見る
We studied the polarization reversal property of a ferroelectric thin film. Applying triangular wave and pulse wave voltages to specimens, we observed the rising of the coercive field and the activation field of ferroelectric thin films with increasing frequency. This shows that the polarization reversal is suppressed because of the increase in the viscosity of the ferroelectric domain wall caused by the increase in the frequency of the applied electric field. Additionally, we measured the frequency dependence of dielectric constant and found that,compared with the experimental data and the Debye model,the relaxation time of the dipole increases because the reversal of the dipole cannot follow the external electric field. As a result of these,it is found that the increase in the viscosity of ferroelectric domain wall is caused by the inability of the reversal of the dipole to follow the external electric field.
八戸工業大学の論文
2006-02-28