Novel Mechanism of Polarization Rotation Induced at Artificial Ferroelectric Interfaces

• Project/Area Number: 18H01474
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 21050:Electric and electronic materials-related
• Research Institution: Nagoya University
• Principal Investigator: Yamada Tomoaki 名古屋大学, 工学研究科, 教授 (80509349)
• Project Period (FY): 2018-04-01 – 2022-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000); Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000); Fiscal Year 2018: ¥11,700,000 (Direct Cost: ¥9,000,000、Indirect Cost: ¥2,700,000)
• Keywords: 強誘電体 / 圧電体 / 薄膜 / 分極 / 人工超格子

Outline of Final Research Achievements

In this study, we focused on artificial interfaces between two different ferroelectric materials and between ferroelectric and dielectric materials in order to enhance the piezoelectric property. We fabricated their artificial superlattice thin films and investigated the polarization state and its electric field response. It was found that the former showed the increased piezoelectric response via field-induced phase transition, which can be explained by thermodynamic theory, and the latter showed the stabilization of vortex polarization structure and its reversible change by an electric field.

Academic Significance and Societal Importance of the Research Achievements

強誘電体は圧電特性（電気-機械エネルギー変換特性）を示し、アクチュエータ、加速度・圧力センサ、振動発電素子等に利用されており、圧電特性のさらなる向上が期待されている。代表的な強誘電体PZTは、モルフォトロピック相境界と呼ばれる組成による結晶相境界で圧電特性が向上することが知られているが、環境に有害な鉛を含まない強誘電体材料ではPZTに匹敵する圧電特性を得ることが容易でないことが明らかになりつつある。本研究は、従来の材料の化学組成に強く依存するアプローチとは異なる方法で圧電特性の向上を目指すための基礎研究であり、あらゆる強誘電体材料に適用することができる点で意義がある。

Research Products

• [Journal Article] Influence of cooling rate on ferroelastic domain structure for epitaxial (100)/(001)-oriented Pb(Zr, Ti)O3 thin films under tensile strain (2021)
  • Author(s): Ehara Yoshitaka、Ichinose Daichi、Kodera Masanori、Shiraishi Takahisa、Shimizu Takao、Yamada Tomoaki、Nishida Ken、Funakubo Hiroshi
  • Journal Title: Japanese Journal of Applied Physics Volume: 60 Issue: SF Pages: SFFB07-SFFB07
  • DOI: 10.35848/1347-4065/ac10f7
  • Peer Reviewed
• [Journal Article] Domain structure transition in compressively strained (100)/(001) epitaxial tetragonal PZT film (2021)
  • Author(s): Ichinose Daichi、Shimizu Takao、Sakata Osami、Yamada Tomoaki、Ehara Yoshitaka、Funakubo Hiroshi
  • Journal Title: Journal of Applied Physics Volume: 129 Issue: 2 Pages: 024101-024101
  • DOI: 10.1063/5.0031803
  • Peer Reviewed
• [Journal Article] Fabrication of (Pb_0.9Sr_0.1)TiO₃/SrTiO₃ artificial superlattice thin films and their electromechanical response (2020)
  • Author(s): Y. Iguchi, T. Yamada, O. Sakata, M. Yoshino, and T. Nagasaki
  • Journal Title: Journal of the Ceramic Society of Japan Volume: 128 Issue: 8 Pages: 431-435
  • DOI: 10.2109/jcersj2.20022
  • NAID: 130007883921
  • ISSN: 1348-6535, 1882-0743
  • Year and Date: 2020-08-01
  • Peer Reviewed / Open Access
• [Journal Article] Large Electromechanical Responses Driven by Electrically Induced Dense Ferroelastic Domains: Beyond Morphotropic Phase Boundaries (2020)
  • Author(s): Nakajima Mitsumasa、Shimizu Takao、Nakaki Hiroshi、Yamada Tomoaki、Wada Ayumi、Nakashima Takaaki、Ehara Yoshitaka、Funakubo Hiroshi
  • Journal Title: ACS Applied Electronic Materials Volume: 2 Issue: 7 Pages: 1908-1916
  • DOI: 10.1021/acsaelm.0c00220
  • Peer Reviewed / Open Access
• [Journal Article] Temperature dependence on the domain structure of epitaxial PbTiO3 films grown on single crystal substrates with different lattice parameters (2020)
  • Author(s): Ehara Yoshitaka、Nakashima Takaaki、Ichinose Daichi、Shimizu Takao、Yamada Tomoaki、Nishida Ken、Funakubo Hiroshi
  • Journal Title: Japanese Journal of Applied Physics Volume: 59 Issue: SP Pages: SPPB01-SPPB01
  • DOI: 10.35848/1347-4065/aba2bf
  • Peer Reviewed
• [Journal Article] Ferroelastic domain motion by pulsed electric field in (111)/(11-1) rhombohedral epitaxial Pb(Zr0.65Ti0.35)O3 thin films: Fast switching and relaxation (2019)
  • Author(s): Ehara Yoshitaka、Shimizu Takao、Yasui Shintaro、Oikawa Takahiro、Shiraishi Takahisa、Tanaka Hiroki、Kanenko Noriyuki、Maran Ronald、Yamada Tomoaki、Imai Yasuhiko、Sakata Osami、Valanoor Nagarajan、Funakubo Hiroshi
  • Journal Title: Physical Review B Volume: 100 Issue: 10 Pages: 1-7
  • DOI: 10.1103/physrevb.100.104116
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Domain Switching by Applied Electric Field in (001) and (111)-epitaxial (K<inf>0.5</inf>Na<inf>0.5</inf>)NbO<inf>3</inf>Films (2018)
  • Author(s): Kawano M.、Yamada T.、Matsuo S.、Yoshino M.、Nagasaki T.、Sakata O.、Imai Y.
  • Journal Title: Proceedings of 2018 IEEE ISAF-FMA-AMF-AMEC-PFM Joint Conference (IFAAP 2018) Volume: なし Pages: 1-3
  • DOI: 10.1109/isaf.2018.8463311
  • Peer Reviewed
• [Presentation] Two-step Phase Transition Behavior in Tensile-strained (PbxSr1-x)TiO3 Thin Films below 50 nm Thickness (2021)
  • Author(s): T. Yamada, Y. Ota, M. Yoshino, D. Ichinose, T. Shimizu, H. Funakubo, and T. Nagasaki
  • Organizer: 2021 ISAF-ISIF-PFM Joint Conference
  • Int'l Joint Research
• [Presentation] Enhanced Piezoelectric Response in (111)-Pb(Zr,Ti)O3 Artificial Superlattice Thin Films (2021)
  • Author(s): T. Yamada, J. Song, Y. Ebihara, T. Kiguchi, M. Yoshino, and T. Nagasaki
  • Organizer: 8th International Workshop on Piezoelectric MEMS
  • Int'l Joint Research
• [Presentation] Evolution of the Domain Structure in Tensile-strained (PbxSr1-x)TiO3 Thin Films Engineered by Composition and Thickness (2021)
  • Author(s): X. Yuan, Y. Ota, M. Yoshino, T. Nagasaki, Y. Ehara, T. Shimizu, H. Funakubo, and T. Yamada
  • Organizer: The 13th China and Japan Symposium on Ferroelectric Materials and Their Applications (CJFMA13)
  • Int'l Joint Research
• [Presentation] Manipulation of Piezoelectric Response in Pb(Zr,Ti)O3 Artificial Superlattice Thin Films (2021)
  • Author(s): T. Yamada, J. Song, Y. Ebihara, X. Yuan, M. Yoshino, and T. Nagasaki
  • Organizer: The 13th China and Japan Symposium on Ferroelectric Materials and Their Applications (CJFMA13)
  • Int'l Joint Research / Invited
• [Presentation] Advancement of Electro-optic Effect in Ferroelectric Thin Films: Controlling Classical Ferroelectrics and Exploring Emerging Ferroelectrics (2021)
  • Author(s): T. Yamada, S. Kondo, H. Funakubo, and T. Nagasaki
  • Organizer: 14th Pacific Rim Conference on Ceramic and Glass Technology including Glass & Optical Materials Division 2021 Annual Meeting
  • Int'l Joint Research / Invited
• [Presentation] Effects of Composition and Thickness on the Domain Structure in Tensile-strained (PbxSr1-x)TiO3 Thin Films (2021)
  • Author(s): X. Yuan, Y. Ota, M. Yoshino, T. Nagasaki, Y. Ehara, T. Shimizu, H. Funakubo, and T. Yamada
  • Organizer: 強誘電体会議FMA-38
• [Presentation] Bottom-up Growth Design and Property Control for Dielectric Thin Films and Nanostructures (2020)
  • Author(s): T. Yamada
  • Organizer: Materials Science & Technology 2020 (MS&T20)
  • Int'l Joint Research / Invited
• [Presentation] Influence of Composition and Thickness on Domain Structure in (PbxSr1-x)TiO3 Thin Films (2019)
  • Author(s): Y. Ota, T. Yamada, M. Yoshino, T. Shimizu, H. Funakubo, and T. Nagasaki
  • Organizer: The 5th International Conference on Advanced Electromaterials (ICAE 2019)
  • Int'l Joint Research
• [Presentation] (PbxSr1-x)TiO3薄膜における組成及び膜厚がドメイン構造に及ぼす影響 (2019)
  • Author(s): 太田 悠登, 山田 智明, 吉野 正人, 清水 荘雄, 舟窪 浩, 長崎 正雄
  • Organizer: 第80回応用物理学会秋季学術講演会
• [Presentation] 強誘電体(Pb0.9Sr0.1)TiO3/常誘電体SrTiO3人工超格子薄膜の作製と電気機械特性の評価 (2019)
  • Author(s): 井口 雄介, 山田 智明, 坂田 修身, 吉野 正人, 長崎 正雄
  • Organizer: 第39回電子材料研究討論会
• [Presentation] Charge Screening-induced Large Piezoelectric Response in Pb(Zr,Ti)O3 Artificial Superlattice Films (2018)
  • Author(s): T. Yamada, Y. Ebihara, O. Sakata, T. Kiguchi, H. Morioka, M. Yoshino and T. Nagasaki
  • Organizer: The 10th China-Japan Symposium on Ferroelectric Materials and Their Applications (JCFMA10)
  • Int'l Joint Research
• [Presentation] Phase Transition Induced by Applied Electric Field in (001) and (111)-epitaxial (K0.5Na0.5)NbO3 Films (2018)
  • Author(s): M. Kawano, T. Yamada, O. Sakata, Y. Imai, M. Yoshino, and T. Nagasaki
  • Organizer: The 10th China-Japan Symposium on Ferroelectric Materials and Their Applications (JCFMA10)
  • Int'l Joint Research
• [Presentation] Domain Switching by Applied Electric Field in (001) and (111)-epitaxial (K0.5Na0.5)NbO3 Films (2018)
  • Author(s): M. Kawano, T. Yamada, O. Sakata, Y. Imai, S. Matsuo, M. Yoshino, and T. Nagasaki
  • Organizer: The 2018 ISAF-FMA-AMF-AMEC-PFM (IFAAP) Joint Conference
  • Int'l Joint Research
• [Presentation] 電界印加による(001)/(111)(K0.5Na0.5)NbO3膜のドメインスイッチング (2018)
  • Author(s): 川野 充季, 山田 智明, 坂田 修身, 今井 康彦, 吉野 正人, 長崎 正雅
  • Organizer: 第79回応用物理学会秋季学術講演
• [Remarks] 研究室HP
  • URL: https://enemat.energy.nagoya-u.ac.jp
• [Remarks] 研究室HP
  • URL: http://enemat.nucl.nagoya-u.ac.jp