Switching Process in Ferroelectric Triglycine Selenate

概要

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Triglycine selenate (TGSe) is isomorphous with Triglycine sulphate and is ferroelectric below 22℃. It is interesting to study the switching process in TGSe in the ferro-state with a view to comparing the results with TSG. The switching process was studied by applying electrical square pulses to produce fields up to 5 kV/cm on the sample, and measuring the parameters characterizing the transient current flowing in the sample, according to the Merz method. The temperature range in which the process was studied was 15℃ to -20℃. The results were analysed by applying the Pulvari-Kuebler theory and the parameters α the activation field and μ the mobility of the domains were evaluated. It is found that μ varies with temperature in TGSe in a manner similar to TGS. μ is lesser for TGSe than for TGS for the same shift of temperature from T_c. The switching behaviour of γ-irradiated TGSe is qualitatively similar to that of unirradiated crystal eventhougth the process gets slowed down as a result of irradiation.
社団法人応用物理学会の論文
1986-03-20