Presentation Information
[8p-F212-9]Time-Dependent Behaviour of Transverse Current in TGS
〇Toshio Kikuta1 (1.Univ. Toyama)
Keywords:
transverse electric field,spontaneous polarization,charge trapping
Time-dependent transverse current in triglycine sulfate (TGS) single crystals was investigated under a transverse electric field of 1 kV/cm applied along the c-axis, over a wide temperature range spanning the ferroelectric phase transition (~322 K). Volume current density was recorded using a three-electrode system after annealing at 345 K, with temperature stability of ±0.02 K.Above the transition temperature, current density increases gradually with time, consistent with space-charge migration and trapping, yielding an activation energy of 0.70 eV. Below the transition temperature, the current exhibits a sharp initial drop followed by recovery and a delayed rise accompanied by pronounced spike noise, with a higher activation energy of 1.73 eV. The time required to reach steady-state current coincides with the time for spontaneous polarization to vanish under the transverse field.These results indicate that trapped charges between dipoles impede domain-dipole reversal, delaying steady-state leakage current. The correlation between charge trapping dynamics and polarization suppression provides direct evidence that the transverse field effect on spontaneous polarization in TGS is governed by interfacial charge trapping mechanisms.