第6回物理工学科教室談話会[Prof. Neil Mathur・12/15(金)16時~]

講 師:Prof. Neil Mathur
所 属:Department of Materials Science, University of Cambridge, UK
題 目:Electrocaloric effects in epitaxial films of SrTiO3
日 時::2023 年 12 月 15 日(金) 16:00~
Date and Time:December 15, 2023 (Friday) 16:00-
場 所:工6号館3階セミナー室A(対面のみ)
Place :Seminar Room A, 3rd floor, Engineering Bldg. 6  (in-person only)

First, I will introduce electrocaloric effects [1,2]. These are reversible or nominally reversible thermal changes that arise when changes of electric field drive changes of local electrical polarization. Then, I will describe electrocaloric effects near the 243 K ferroelectric phase transition in epitaxial films of SrTiO3 on DyScO3 substrates [3]. Results will be compared with (1) bulk SrTiO3 and (2) the canonical Landau description of this system.

[1] X. Moya, S. Kar-Narayan and N. D. Mathur, Science 370 (2020) 797.
[2] X. Moya and N. D. Mathur, Nature Materials 13 (2014) 439.
[3] S. Zhang et al., Nature Materials, invited resubmission.

紹介教員: 木村 剛 教授(物理工学専攻)、齊藤 英治 教授(物理工学専攻)