[17a-B3-1~8] 6.1 Ferroelectric thin films

10:30 AM - 10:45 AM JST(1:30 AM - 1:45 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[17a-B3-5] Control of Y-site occupancy in pyrochlore-type oxide Y₂Ti₂O₇

〇(M1C)Haruka Nada¹, Shunya Yokote¹, Masahito Yoshino¹, Takanori Nagasaki¹, Kazuki Shidara², Hiroki Moriwake^2,3, Tomoaki Yamada^1,3 (1.Nagoya Univ., 2.JFCC, 3.TokyoTech. MDX)

Keywords:

pyrochlore-type oxide,films

It is important that the capacitance of multilayer ceramic capacitors used in electric vehicles does not change with temperature. Some pyrochlore oxides with ferroelectric properties are known to be materials with relatively high and temperature-stable dielectric constants, and their dielectric properties are believed to be due to the spread of the positions of the A-site ions. This study attempted to control the spatial arrangement of Y sites in Y₂Ti₂O₇ by partially substituting Y with Sc, which has a smaller ionic radius, or La, which has a larger ionic radius.