10:30 AM - 10:45 AM
△ [6a-A502-7] Observation of Domain-Wall Motion in Organic Ferroelectric Thin Films Using Ferroelectric Field-Modulation Imaging Technique
Keywords:organic ferroelectrics, observation of ferroelectric domain motion, domain observation technique of ferroelectrics
Recently, proton-transfer type organic ferroelectrics which have small coercive electric field have been reported and are expected to be key materials for low voltage driving devices. For the development of devices, observation of polarization domain motion in single crystal thin films is inevitable.
So far, we have developed an optical technique “Ferroelectrics field modulation imaging (FFMI)” in order to visualize the polarization domain structure, which detects the change of optical spectrum induced by modulation electric field by using an area imaging sensor.
This time, we combined temperature controlled stage with FFMI, and observed the motion of polarization domains at different temperature. In the result, we directly observed that the higher the temperature, the faster the motion of polarization domains. On the day, we also discuss the reason that coercive electric field in thin films become larger than that in bulk crystals.
So far, we have developed an optical technique “Ferroelectrics field modulation imaging (FFMI)” in order to visualize the polarization domain structure, which detects the change of optical spectrum induced by modulation electric field by using an area imaging sensor.
This time, we combined temperature controlled stage with FFMI, and observed the motion of polarization domains at different temperature. In the result, we directly observed that the higher the temperature, the faster the motion of polarization domains. On the day, we also discuss the reason that coercive electric field in thin films become larger than that in bulk crystals.