Presentation Information
[9a-P04-5]Mechanism for Pinning of Ferroelastic Domain Walls and Polarization Switching Revealed by Direct Observation
〇(D)Itsuki Miyamoto1, Satoru Inoue1, Jun Harada2, Tatsuo Hasegawa1 (1.U. Tokyo, 2.Hokkaido Univ.)
Keywords:
molecular ferroelectric,optical microscopy,ferroelastic domain wall
Electric-field response of domain walls greatly affects various properties of ferroelectrics, such as polarization switching, dielectric and piezoelectric effects. However, it has been difficult to directly observe motion of ferroelastic domain walls in ferroelectric films. Focusing on plastic/ferroelectric molecular crystals, where ordering of molecular orientation produces multiaxial polarization, we successfully observed displacement of ferroelastic domain walls by electric-field modulation on polarized optical microscopy. Here, we report systematic analysis on their electric-field response, which reveals mechanism underlying domain-wall pinning and polarization switching.