Studies on unltra-fast polarization switching in ferroelectric polymer thin films by means of time-resolved piezo-force-microscopy

2013 Fiscal Year Final Research Report

• Project/Area Number: 23550254
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Polymer/Textile materials
• Research Institution: Kobayasi Institute of Physical Research
• Principal Investigator: FURUKAWA Takeo 一般財団法人小林理学研究所, その他部局等, 研究員 (90087411)
• Co-Investigator(Kenkyū-buntansha): 児玉 秀和 小林理学研究所 (60373198)
• Co-Investigator(Renkei-kenkyūsha): 高橋 芳行 東京理科大学 (80266923)
• Project Period (FY): 2011 – 2013
• Keywords: 強誘電ポリマー / フッ化ビニリデン / 高分子薄膜 / 強誘電分極反転 / 超高速スイッチング / 超高電場 / 圧電応力顕微法 / 核生成成長

Research Abstract

Measurements of ultrafast polarization switching and time-resolved piezo-force microscopy (TR-PFM) were conducted for thin films of vinylidene fluoride-based ferroelectric polymers. We found that the switching time follows an exponential law below 300MV/m and is transferred to a power low at higher fields. It becomes as fast as 1 ns at 800MV/m. This switching time is its practically limited value due to electrical breakdown and thermal diffusion time. TR-PFM allowed for direct observation of hypothetical nucleation-growth processes taking place in crystalline grains comprising ferroelectric polymer thin films. The nucleation probability and growth velocity were separately determined and their values were shown to be consistent with observed ferroelectric switching time.

Research Products

• [Journal Article] (2014)
  • Author(s): Akira Itoh, Yoshiyuki Takahashi, Takeo Furukawa, Hirofumi Yajima
  • Journal Title: Polymer J. Volume: 46 Pages: 207-2011
  • Peer Reviewed
• [Journal Article] (2013)
  • Author(s): Hajime Ishii, Takashi Nakajima, Takeo Furukawa, Soichiro Okamura
  • Journal Title: Jpn. J. Appl. Phys. Volume: 52 Pages: 41603
  • Peer Reviewed
• [Journal Article]
  • Author(s): Yoshiyuki Takahashi, Tomoda, Naoko Takeo Furukawa
  • Journal Title: Polymer J. Volume: (to be published)
  • Peer Reviewed
• [Presentation] (2014)
  • Author(s): 中川佑太、橋爪洋一郎、中嶋宇史、古川猛夫、岡村総一朗
  • Organizer: 第61回応用物理学会春季学術講演会
  • Place of Presentation: 青山学院大学
  • Year and Date: 2014-03-18
• [Presentation] (2012)
  • Author(s): T. Nakajima, H. Yamaguchi, H. Ishii, T. Furukawa, S. Okamura
  • Organizer: IUMRS- International Conference on Electronic Materials (IUMRS-ISWM2012)
  • Place of Presentation: パシフィコ横浜
  • Year and Date: 2012-09-24
• [Presentation] (2012)
  • Author(s): 石井肇、中嶋宇史、古川猛夫、岡村総一朗
  • Organizer: 第73回応用物理学会学術講演会
  • Place of Presentation: 愛媛大学・松山大学
  • Year and Date: 2012-09-13
• [Presentation] (2012)
  • Author(s): 中川佑太、石井肇、中嶋宇史、古川猛夫、岡村総一朗
  • Organizer: 第73回応用物理学会学術講演会
  • Place of Presentation: 愛媛大学・松山大学
  • Year and Date: 2012-09-13
• [Presentation] (2012)
  • Author(s): 石井肇、中嶋宇史、岡村総一朗、古川猛夫
  • Organizer: 第29回強誘電体応用会議
  • Place of Presentation: コープイン京都
  • Year and Date: 2012-05-24
• [Presentation] (2012)
  • Author(s): 石井肇、中嶋宇史、高橋芳行、古川猛夫、岡村総一朗
  • Organizer: 第59回応用物理関係連合講演会
  • Place of Presentation: 早稲田大学(東京都新宿区)
  • Year and Date: 2012-03-18
• [Presentation] (2011)
  • Author(s): T. Furukawa, H. Kodama
  • Organizer: 14^<th> International Symposium on Electrets
  • Place of Presentation: Montpellier, France
  • Year and Date: 20110900
• [Presentation] (2011)
  • Author(s): 石井肇、中嶋宇史、高橋芳行、古川猛夫、岡村総一朗
  • Organizer: 第60回高分子討論会
  • Place of Presentation: 岡山大学(岡山県岡山市)
  • Year and Date: 2011-09-28