[16p-S4_202-1~10] 9.1 Dielectrics, ferroelectrics

2:30 PM - 2:45 PM JST(5:30 AM - 5:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[16p-S4_202-3] Observation of Two-Phase Coexistence in Negative Thermal Expansion Material Particles Using a Piezoelectric Response Microscope

〇(M1)Yusuke Shiono¹, Takumi Nishikubo^2,1, Kei Shigematsu^1,2, Jun Miyake¹, Kano Hatayama¹, Masaki Azuma^1,2 (1.Science Tokyo, 2.KISTEC)

Keywords:

negative thermal expansion,domain structure,ferroelectric

In negative thermal expansion (NTE) materials caused by first-order phase transitions, two phases with different volumes change their proportions as the temperature rises, resulting in NTE. However, it is not clear how the two phases coexist during the phase transition. In this study, we focused on BiFeO3- based NTE materials caused by ferroelectric transitions and attempted to visualize the domain structure using piezoresponse force microscope. We successfully observed ferroelectric domains in a single particle at room temperature. We also succeeded in observing the two coexisting ferroelectric and paraelectric phases and found that this observation method is suitable for our purpose.