Control of polarization switching in tetrahedral ferroelectrics by thin film forming with application of strain

• Project/Area Number: 15K18212
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Inorganic materials/Physical properties
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: YASUI Shintaro 東京工業大学, 科学技術創成研究院, 助教 (40616687)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: ferroelectrics / thin films / epitaxial strain / tetrahedral / ferroelectric / polarization switching / 強誘電体 / 薄膜 / 歪み / 四面体構造 / 分極反転

Outline of Final Research Achievements

Purpose of this study is focus on development of tetrahedral and tetrahedral/octahedral hybrid type ferroelectrics and their polarization switching. From first principle calculation, activation energy of polarization switching in wurtzite tetrahedral ferroelectrics was 0.25eV. In addition, in the hybrid tetrahedral/octahedral ferroeelctrics case, we have investigated k-Al2O3 type ferroelectrics as a model of hybrid structure. Activation energy of polarization switching was 0.1eV, then we could observed polarization switching experimentaly, also.

Research Products

• [Int'l Joint Research] Technical University Darmstadt/FAU Erlangen-Nurnberg(Germany)
• [Int'l Joint Research] NIST/University of Maryland(米国)
• [Int'l Joint Research] University of Sydney South Walls(オーストラリア)
• [Journal Article] Crystal Isomers of ScFeO3 (2016)
  • Author(s): Yosuke Hamasaki, Takao Shimizu, Shintaro Yasui, Tomoyasu Taniyama, Osami Sakata, and Mitsuru Itoh
  • Journal Title: Crystal Growth & Design Volume: 16 Issue: 9 Pages: 52145222-52145222
  • DOI: 10.1021/acs.cgd.6b00770
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Evidence of Ferroelectricity in Ferrimagnetic k-Al2O3-type In0.25Fe1.75O3 Films (2016)
  • Author(s): Yosuke Hamasaki, Takao Shimizu, Shintaro Yasui, Tomoyasu Taniyama, Mitsuru Itoh
  • Journal Title: Applied Physics Letters Volume: 109 Issue: 16 Pages: 1629011-4
  • DOI: 10.1063/1.4964826
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Mechanism of Polarization Switching in Wurtzite-Structured Zinc Oxide Thin Films (2016)
  • Author(s): A. Konishi, T. Ogawa, C.A.J. Fisher, A. Kuwabara, T. Shimizu, S. Yasui, M. Itoh and H. Moriwake
  • Journal Title: Appl. Phys. Lett. Volume: 109 Issue: 10 Pages: 102903-102903
  • DOI: 10.1063/1.4962440
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Large irreversible non-180° domain switching after poling treatment in Pb(Zr, Ti)O3 films (2016)
  • Author(s): Yoshitaka Ehara, Shintaro Yasui, Takahiro Oikawa, Takahisa Shiraishi, Naoya Oshima, Tomoaki Yamada, Yasuhiko Imai, Osami Sakata and Hiroshi Funakubo
  • Journal Title: Appl. Phys. Lett Volume: 108 Issue: 21 Pages: 212901-212901
  • DOI: 10.1063/1.4951672
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] High Temperature Stability of the Dielectric and Insulating Properties of Ca(Ti, Zr)SiO5 Ceramics (2016)
  • Author(s): Junichi Kimura, Hiroki Taniguchi, Takashi Iijima, Takao Shimizu, Shintaro Yasui, Mitsuru Itoh, and Hiroshi Funakubo
  • Journal Title: Applied Physics Letters Volume: 108 Issue: 6
  • DOI: 10.1063/1.4941803
  • Peer Reviewed
• [Journal Article] Enhancement of Dielectric Properties in Epitaxial Bismuth Ferrite-Bismuth Samarium Ferrite Superlattices (2016)
  • Author(s): Ronald Maran, Shintaro Yasui, Eugene Eliseev, Anna Morozovska, Hiroshi Funakubo, Ichiro Takeuchi, and Nagarajan Valanoor
  • Journal Title: Adv. Electron. Mater. Volume: - Issue: 8 Pages: 1600170-1600170
  • DOI: 10.1002/aelm.201600170
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] 非ペロブスカイト型酸化物強誘電体開発 (2016)
  • Author(s): 伊藤 満, 濵嵜 容丞, 安井 伸太郎
  • Journal Title: セラミックス Volume: 51 Pages: 661-665
• [Presentation] Switchable Polarization of Bi(Zn1/2Ti1/2)O3-Based Lead-Free Ferroelectric Thin Films for FeRAM Application (2016)
  • Author(s): Shintaro Yasui, Hiroshi Uchida, and Hiroshi Funakubo
  • Organizer: 2016 MRS Fall Meeting & Exhibit
  • Place of Presentation: Boston, USA
  • Year and Date: 2016-11-27
  • Int'l Joint Research
• [Presentation] New Type Ferroelectric Material and Their Polarization Switching (2016)
  • Author(s): Shintaro Yasui, Yosuke Hamasaki, Ayako Konishi, Hiroki Moriwake, and Mitsuru Itoh
  • Organizer: Visual-JW2016
  • Place of Presentation: 大阪市
  • Year and Date: 2016-10-17
  • Int'l Joint Research / Invited
• [Presentation] 四面体型強誘電体薄膜の作製と分極反転の可能性 (2016)
  • Author(s): 安井 伸太郎, 高橋 竜太, リップマー ミック, 小西 綾子, 森分 博紀, 伊藤 満
  • Organizer: 日本セラミックス協会第29回秋季シンポジウム
  • Place of Presentation: 広島大学
  • Year and Date: 2016-09-07
• [Presentation] 薄膜における材料探索 ～圧電体を例に～ (2016)
  • Author(s): 安井伸太郎
  • Organizer: 第52回東海若手セラミスト懇話会
  • Place of Presentation: 岐阜市
  • Year and Date: 2016-06-23
  • Invited
• [Presentation] Metastable Ferroelectric Thin Films (2016)
  • Author(s): Shintaro Yasui
  • Organizer: Japan & France Joint Workshop - Oxide electronics and spintronics seminar
  • Place of Presentation: Paris, France
  • Year and Date: 2016-05-19
  • Int'l Joint Research / Invited
• [Presentation] k-Al2O3型構造強誘電体の作製 (2016)
  • Author(s): 安井 伸太郎, 濵嵜 容丞, 伊藤 満, 小西 綾子, 森分 博紀, 白石 貴久, 木口 賢紀
  • Organizer: 「学際・国際的高度人材育成ライフイノベーションマテリアル創製 共同研究プロジェクト」（六研連携プロジェクト）キックオフ公開討論会
  • Place of Presentation: 名古屋大学
• [Presentation] Design of New Teterahedral Ferroelectric System (2015)
  • Author(s): Mitsuru Itoh, Yosuke Hamasaki, Shintaro Yasui, Tomoyasu Taniyama, Ayako Konishi, and Hiroki Moriwake
  • Organizer: The International Cemical Congress of Pacific Basin Societies 2015 (PACIFICHEM)
  • Place of Presentation: Hawaii, USA
  • Year and Date: 2015-12-18
  • Int'l Joint Research / Invited
• [Presentation] 強誘電体になりうるウルツアァイト型構造薄膜の作製 (2015)
  • Author(s): 安井 伸太郎, 伊藤 満, 高橋 龍太, Mikk Lippmaa, 小西 綾子, 森分 博紀
  • Organizer: 第6回6大学6研究所連携プロジェクト公開討論会
  • Place of Presentation: 仙台市・東北大
  • Year and Date: 2015-11-20
• [Presentation] Strategy for the Design of New Ferroelectric Materials: from Conventional Octahedral System to Novel Tetrahedral System (2015)
  • Author(s): Mitsuru Itoh, Shintaro Yasui, Tomoyasu Taniyama, and Hiroki Taniguchi
  • Organizer: 14th Conference of the Euroipean Ceramic Society (ECerS 2015)
  • Place of Presentation: Toledo, Spain
  • Year and Date: 2015-06-24
  • Int'l Joint Research / Invited
• [Presentation] Growth of Ferroelectric Wurtzite Thin Films (2015)
  • Author(s): Shintaro Yasui, Ryota Takahashi, Mikk Lippmaa, Ayako Konishi, Hiroki Moriwake, and Mitsuru Itoh
  • Organizer: 6th International Symposium on Advanced Materials Development and Integration of Novel Structured Metallic and Inorganic Materials (AMDI-6)
  • Place of Presentation: Waseda Univ, Japan
  • Year and Date: 2015-06-09
  • Int'l Joint Research
• [Remarks] 東京工業大学 伊藤谷山研究室
  • URL: http://www.msl.titech.ac.jp/~itohlab/
• [Remarks] 研究室HP
  • URL: http://www.msl.titech.ac.jp/~itohlab/