We observed the irreversible extinction of ferroelectric polarization in spun coated poly(vinylidene fluoride-co-trifluoroethylene) thin films upon melting and recrystallization. We investigate the alteration of the ferroelectric properties correlated with the preferred polymer crystal orientation with respect to the electrodes using grazing incident scattering, spectroscopy, and electron microscopes. Heat treatment above melting point gave rise to the significant reduction of the ferroelectric performance mainly caused by the modification of molecular orientation of polymer crystals whose c and b axes are perpendicular and parallel to the electrode surface, respectively, leading to almost zero effective electric field.
Bibliographical noteFunding Information:
This project was supported by the National Research Program for the 0.1 Terabit Non-volatile Memory Development sponsored by Korea Ministry of Commerce, Industry and Energy, Samsung Electronics, Co., Ltd. The x-ray experiments at PAL (4C2 beamline), Korea were supported by MOST and POSCO, Korea.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)