[16a-M_B07-1~9] 9.1 Dielectrics, ferroelectrics

10:30 AM - 11:00 AM JST(1:30 AM - 2:00 AM UTC)

[16a-M_B07-6] [The 47th Paper Award Speech] Direct Observation of Rotation of Polarization using 4D-STEM

〇Daisuke Morikawa¹, Yuji Noguchi², Kenji Tsuda¹ (1.IMRAM, Tohoku Univ., 2.Kumamoto Univ.)

Keywords:

ferroelectrics,polar domain boundary,electron diffraction

We analyzed the polarization distribution of 90-degree domain walls in ferroelectric BaTiO₃ using 4D-STEM. Our analysis successfully achieved direct observation of polarization rotation near the walls, revealing rapid structural changes within approximately 5 nm and symmetry disruptions extending over a wider range. These findings are consistent with theoretical calculations, demonstrating the effectiveness of this method for analyzing microstructures involving polarization rotation.