二量体分子における強誘電性スメクチック-A相の誘電緩和挙動
二量体分子における強誘電性スメクチック-A相の誘電緩和挙動
カテゴリ: 論文誌(論文単位)
グループ名: 【A】基礎・材料・共通部門
発行日: 2022/04/01
タイトル(英語): Dielectric Relaxation Behavior of Ferroelectric Smectic-A Phase in Dimeric Molecules
著者名: 中杉 茂正(LG Japan Lab(株) 先端技術研究室),姜 聲敏(LG Japan Lab(株) 先端技術研究室/東京工業大学 科学技術創成研究院),渡辺 順次(東京工業大学 科学技術創成研究院),曽根 正人(東京工業大学 科学技術創成研究院),石崎 博基(LG Japan Lab(株) 先端技術研究室/東京工業大学 科学技術創成研究院)
著者名(英語): Shigemasa Nakasugi (Advanced Technology Research Dep., LG Japan Lab Inc.), Sungmin Kang (Advanced Technology Research Dep., LG Japan Lab Inc./Institute of Innovative Research, Tokyo Institute of Technology), Junji Watanabe (Institute of Innovative Research, Tokyo Institute of Technology), Masato Sone (Institute of Innovative Research, Tokyo Institute of Technology), Hiroki Ishizaki (Advanced Technology Research Dep., LG Japan Lab Inc./Institute of Innovative Research, Tokyo Institute of Technology)
キーワード: 二量体分子,液晶,強誘電性,誘電緩和挙動,ゴールドストーンモード,協同的揺らぎ dimeric molecule,liquid crystal,ferroelectric,dielectric relaxation behavior,goldstone mode,cooperative fluctuation
要約(英語): The dielectric relaxation behavior is investigated in the ferroelectric smectic-A phase, which is a mixture of schiff base dimeric molecules with different alkyl chain lengths. The ferroelectric smectic-A phase shows the Goldstone mode due to its high dielectric strength (relative permittivity excluding the contribution of ion diffusion in the low frequency region). The dielectric strength increases dramatically with increasing the cell thickness. By applying the DC bias fields, the Goldstone mode of the ferroelectric smectic-A phase is quenched, and this phenomenon is explained by the suppression of the dipoles' fluctuation due to the DC bias fields. The Goldstone mode and the high frequency mode of the SmAPF phase follow the standard Arrhenius equation in the vicinity of the phase transition with the isotropic phase.
本誌: 電気学会論文誌A(基礎・材料・共通部門誌) Vol.142 No.4 (2022) 特集:2021年基礎・材料・共通部門大会
本誌掲載ページ: 152-158 p
原稿種別: 論文/日本語
電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/142/4/142_152/_article/-char/ja/
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