[15p-K503-1~15] 6.1 Ferroelectric thin films

1:45 PM - 2:00 PM JST(4:45 AM - 5:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation AwardHighlighted Presentation

[15p-K503-4] BiFeO₃ Freestanding Film Under Light Irradiation

〇(M1C)Ren Mitsuya¹, Weikun Zhou¹, Atsushi Taguchi², Hiromichi Ohta², Tsukasa Katayama^2,3 (1.IST-Hokkaido Univ., 2.RIES-Hokkaido Univ., 3.JST-PRESTO)

Keywords:

semiconductor,light actuator

BiFeO₃, which has a perovskite structure, has been widely studied as a multiferroic material that combines ferroelectric and magnetic orders at room temperature. Moreover, flexible freestanding membranes can be obtained by peeling BiFeO₃ thin films off from substrates. Recently, we reported that freestanding ferroelectric BaTiO₃ membranes can be deformed by ultraviolet light irradiation; however, the displacement was limited to several tens of micrometers, or about 5% of the sheet length. In this study, we successfully achieved a large displacement of 1.8 mm, equivalent to 60% of the sheet length, by irradiating a BiFeO₃ freestanding membrane with a green visible light laser, using a sheet with a total length of 3 mm.