• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of new functionality in fluorite ferroelectrics through domain and phase coexistence

Research Project

Project/Area Number 17K14807
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Inorganic materials/Physical properties
Research InstitutionTokyo Institute of Technology

Principal Investigator

Takao Shimizu  東京工業大学, 物質理工学院, 助教 (60707587)

Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywordsハフニウム酸化物 / 強誘電性 / 圧電性 / 薄膜成長 / HfO2 / エピタキシャル薄膜 / その場観察 / ドメインスイッチング / 強誘電体 / ドメイン構造 / 相共存
Outline of Final Research Achievements

The novel functionality had been developed in HfO2-based ferroelectric materials, which belongs novel ferroelectric class with the fluorite crystal structure. We found the electric field induced domain switching, which means the spontaneous polarization rotation by electric field. In addition, we confirm the ferroelectricity in micro-meter thick films, although the ferroelectricity in HfO2 films had been believed only in thin films below 100 nano-meter.

Academic Significance and Societal Importance of the Research Achievements

本研究では、微小電気機械システムを主眼とした圧電体応用を目指し、HfO2基薄膜強誘電体の厚膜化とドメインスイッチングの観測を行った。結果として、これまで極薄膜特有の特性であると思われていたHfO2基薄膜の強誘電性が、マイクロメートルスケールまで特性発現することを明らかにした。これはこの薄膜がMEMS用途にも十分応用可能であることを示している。また、HfO2基薄膜のドメインスイッチングは、圧電性向上の可能性を示すとともに、この物質の強誘電性が結晶由来のものであるということを示す強固な証拠となった点で学術的にも大きな意味を持つ結果である。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (9 results)

All 2019 2018 2017

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (4 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Effects of heat treatment and in-situ high temperature XRD study on the formation of ferroelectric epitaxial Y doped HfO2 film2019

    • Author(s)
      Takanori Mimura, Takao Shimizu, Takanori Kiguchi, Akihiro Akama, Toyohiko J. Konno, Yoshio Katsuya, Osami Sakata, and Hiroshi Funakubo
    • Journal Title

      Jpn. J. Appl. Phys.

      Volume: 58 Issue: SB Pages: SBBB09-SBBB09

    • DOI

      10.7567/1347-4065/aafed1

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Stability of the orthorhombic phase in (111)-oriented YO<sub>1.5</sub>-substituted HfO<sub>2</sub> films2018

    • Author(s)
      Takao Shimizu, Kiliha Katayama, Hiroshi Funakubo
    • Journal Title

      Journal of the Ceramic Society of Japan

      Volume: 126 Issue: 5 Pages: 269-275

    • DOI

      10.2109/jcersj2.17247

    • NAID

      130006730897

    • ISSN
      1348-6535, 1882-0743
    • Year and Date
      2018-05-01
    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Epitaxial ferroelectric Y-doped HfO2 film grown by the RF magnetron sputtering2018

    • Author(s)
      Taisei Suzuki, Takao Shimizu, Takanori Mimura, Hiroshi Uchida, and Hiroshi Funakubo
    • Journal Title

      Jpn. J. Appl. Phys.

      Volume: 57 Issue: 11S Pages: 11UF15-11UF15

    • DOI

      10.7567/jjap.57.11uf15

    • NAID

      210000149824

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ferroelectricity mediated by ferroelastic domain switching in HfO2-based epitaxial thin films2018

    • Author(s)
      Takao Shimizu, Takanori Mimura, Takanori Kiguchi, Takahisa Shiraishi, Toyohiko Konno, Yoshio Katsuya, Osami Sakata, and Hiroshi Funakubo
    • Journal Title

      Appl. Phys. Lett.

      Volume: 113 Issue: 21 Pages: 212901-212901

    • DOI

      10.1063/1.5055258

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dynamic observation of ferroelectric domain switching using scanning nonlinear dielectric microscopy2017

    • Author(s)
      Yoshiomi Hiranaga, Takanori Mimura, Takao Shimizu, Hiroshi Funakubo, Yasuo Cho
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 56 Issue: 10S Pages: 10PF16-10PF16

    • DOI

      10.7567/jjap.56.10pf16

    • NAID

      210000148393

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] Domain switching in epitaxial ferroelectric HfO2 films2018

    • Author(s)
      T. Shimizu, T. Mimura, T. Kiguchi, T. Shiraishi, A. Akama, T. J. Konno, O. Sakata, K. Yoshio, H. Funakubo
    • Organizer
      2018 Conference on Electronic and Advanced Materials
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] HfO2基材料薄膜における強誘電性に関する研究2018

    • Author(s)
      清水荘雄
    • Organizer
      日本セラミックス協会 2018年年会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] HfO2基材料における強誘電相発現要因の検討2017

    • Author(s)
      清水荘雄、三村和仙、木口賢紀、赤間章裕、今野豊彦、坂田修身、舟窪浩
    • Organizer
      日本セラミックス協会第30回秋季シンポジウム
    • Related Report
      2017 Research-status Report
  • [Presentation] HfO2基強誘電体のドメイン構造と電場誘起スイッチング”、第37回エレクトロセラミックス研究討論会2017

    • Author(s)
      清水荘雄、三村和仙、木口賢紀、白石貴久、赤間章裕、今野豊彦、坂田修身、勝矢良雄、舟窪浩
    • Organizer
      第37回エレクトロセラミックス研究討論会
    • Related Report
      2017 Research-status Report

URL: 

Published: 2017-04-28   Modified: 2020-03-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi