Ferroelectric composed of two elements

• Project/Area Number: 17H06240
• Research Category: Grant-in-Aid for Challenging Research (Pioneering)
• Allocation Type: Single-year Grants
• Research Field: Inorganic materials chemistry, Energy-related chemistry, and related fields
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: ITOH MITSURU 東京工業大学, 科学技術創成研究院, 教授 (30151541)
• Project Period (FY): 2017-06-30 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥26,000,000 (Direct Cost: ¥20,000,000、Indirect Cost: ¥6,000,000); Fiscal Year 2019: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000); Fiscal Year 2018: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000); Fiscal Year 2017: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
• Keywords: 強誘電体 / 2元化合物 / κアルミナ / ウルツァイト / 窒化物 / 酸化物 / ｋアルミナ型酸化物 / 強誘電性 / RRAM / マルチフェロイック / 電気化学挿入 / PLD / 溶液法 / kアルミナ / フェリ磁性 / 単結晶 / 薄膜 / k-Al2O3型酸化物

Outline of Final Research Achievements

The purpose of this study is to find out quite new ferroelectric materials in the framework of two constituent elements. Most of known ferroelectric materials are perovskites with a simple crystal structure, which show superior ferroelectric properties. However, at the present time, most of the researchers' attention is focused on perovskite ferroelectrics and not so many few materials are not discovered compared to the situation in other fields. In this study, I have focused on the ferroelectricity in two binary compound systems of k-Alumina and wurtzite. Potential of these two materials were fully discussed based on experimental and theory.

Academic Significance and Societal Importance of the Research Achievements

本研究を3年に渉って精力的に実施した結果、非ペロブスカイト型化合物の持つ潜在力を十分に詳らかにすることができた。物質研究は数ある物質の持つ多様性を認識することから始まり、既知物質や既知構造に関する帰納と演繹により新物質にたどり着くことができる。本研究では、強誘電性を示すのに最低限の構成元素で成り立つ物質を見直す事により、新しい強誘電性発現の機構を研究者に対して提示することができた。

Research Products

• [Int'l Joint Research] Aalto University(フィンランド)
• [Int'l Joint Research] Kiel University(ドイツ)
• [Int'l Joint Research] 上海珪酸塩研究所(中国)
• [Journal Article] Investigation of Ferrimagnetism and Ferroelectricity in AlxFe2-xO3 Thin Films (2020)
  • Author(s): Badari Narayana Rao, Shintaro Yasui, Tsukasa Katayama, Ayako Taguchi, Hiroki Moriwake, Yosuke Hamasaki, and Mitsuru Itoh
  • Journal Title: Journal of Materials Chemistry C Volume: 8 Pages: 706-714
  • DOI: 10.1039/c9tc05390e
  • Peer Reviewed
• [Journal Article] Modulating the Structure and Magnetic Properties of ε-Fe2O3Nanoparticles via Electrochemical Li+ Insertion (2020)
  • Author(s): Sou Yasuhra, Yosuke Hamasaki, Tsukasa Katayama, Takahiro Ao, Yoshiyuki Inaguma, Hajime Hojo, Maarit Karppinen, Anish Philip, Shintaro Yasui, and Mitsuru Itoh
  • Journal Title: Inorg. Chem. Volume: 59 Pages: 4357-4365
  • DOI: 10.1021/acs.inorgchem.9b03302
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Redox-based multilevel resistive switching in AlFeO3 thin-film heterostructures (2020)
  • Author(s): Badari Narayana Rao, Shintaro Yasui, Yefei Han,Yosuke Hamasaki,Tsukasa Katayama, Takahisa Shirashi, Takanori Kiguchi, and Mitsuru Itoh
  • Journal Title: ACS Applied Electronic Materials Volume: 2 Pages: 1065-1065
  • DOI: 10.1021/acsaelm.0c00083
  • Peer Reviewed
• [Journal Article] Flexible ε-Fe2O3-terephthalate thin-film magnets through ALD/MLD (2020)
  • Author(s): Anish Philip, Janne-Petteri Niemel;, Girish C Tewari, Barbara Putz, Thomas Edward James Edwards, Mitsuru Itoh, Ivo Utke, and Maarit Karppinen
  • Journal Title: ACS Applied Materials & Interfaces Volume: 16 Pages: 789-799
  • DOI: 10.1021/acsami.0c04665
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Magnetic properties of Single Crystal GaFeO3 (2019)
  • Author(s): Tachiyama Koki、Yasui Shintaro、Aroor Rao Badari Narayana、Dazai Takuro、Usami Takamasa、Taniyama Tomoyasu、Katayama Tsukasa、Hamasaki Yosuke、Yu Jianding、He Huan、Wang Hui、Itoh Mitsuru
  • Journal Title: MRS Advances Volume: 4 Pages: 61-66
  • DOI: 10.1557/adv.2019.37
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Fabrication and Characterization of Multiferroic Al0.5Fe1.5O3 Epitaxial Thin Films (2019)
  • Author(s): Aroor Rao Badari Narayana、Yasui Shintaro、Katayama Tsukasa、Itoh Mitsuru
  • Journal Title: MRS Advances Volume: 4 Pages: 539-544
  • DOI: 10.1557/adv.2019.121
  • Peer Reviewed
• [Journal Article] Ferroelectric and ferrimagnetic properties of ε-Rh<i>_x</i>Fe₂₋<i>_x</i>O₃ thin films (2019)
  • Author(s): Shintaro Yasui, Tsukasa Katayama, Takuya Osakabe, Yosuke Hamasaki, Tomoyasu Taniyama, and Mitsuru Itoh
  • Journal Title: J. Ceram. Soc. Japan Volume: 127 Issue: 7 Pages: 474-477
  • DOI: 10.2109/jcersj2.19048
  • NAID: 130007672949
  • ISSN: 1348-6535, 1882-0743
  • Peer Reviewed
• [Journal Article] Ferroelectric and Magnetic Properties in Room-Temperature Multiferroic GaxFe2-xO3 Epitaxial Thin Films (2018)
  • Author(s): Katayama Tsukasa、Yasui Shintaro、Hamasaki Yosuke、Shiraishi Takahisa、Akama Akihiro、Kiguchi Takenori、Itoh Mitsuru
  • Journal Title: Advanced Functional Materia Volume: 28 Pages: 1704789-1704789
  • DOI: 10.1002/adfm.201704789
  • Peer Reviewed
• [Journal Article] Electric Transport Characteristics of Gallium Iron Oxide Epitaxial Thin Film (2018)
  • Author(s): Katayama Tsukasa、Yasui Shintaro、Hamasaki Yosuke、Itoh Mitsuru
  • Journal Title: MRS Advances Volume: 2 Pages: 3459-3464
  • DOI: 10.1557/adv.2017.370
  • Peer Reviewed
• [Journal Article] Chemical tuning of room-temperature ferrimagnetism and ferroelectricity in ε-Fe2O3-type multiferroic oxide thin films (2018)
  • Author(s): Katayama Tsukasa、Yasui Shintaro、Hamasaki Yosuke、Osakabe Takuya、Itoh Mitsuru
  • Journal Title: J. Mater. Chem. C Volume: 5 Pages: 12597-12601
  • DOI: 10.1039/c7tc04363e
  • Peer Reviewed
• [Journal Article] Ferrimagnetism and Ferroelectricity in Cr-Substituted GaFeO3 Epitaxial Films (2018)
  • Author(s): Katayama Tsukasa、Yasui Shintaro、Osakabe Takuya、Hamasaki Yosuke、Itoh Mitsuru
  • Journal Title: Chem. Mater. Volume: 30 Pages: 14361441-14361441
  • DOI: 10.1021/acs.chemmater.8b00144
  • Peer Reviewed
• [Journal Article] Effect of Cr substitution on ferrimagnetic and ferroelectric properties of GaFeO3 epitaxial thin films (2018)
  • Author(s): Katayama Tsukasa、Osakabe Takuya、Yasui Shintaro、Hamasaki Yosuke、Rao Badari Narayana、Zhang Minghui、Itoh Mitsuru
  • Journal Title: Applied Physics Letters Volume: 113 Pages: 162901-162901
  • DOI: 10.1063/1.5029442
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Control of crystal-domain orientation in multiferroic Ga0.6Fe1.4O3 epitaxial thin films (2017)
  • Author(s): Katayama Tsukasa、Yasui Shintaro、Hamasaki Yosuke、Itoh Mitsuru
  • Journal Title: Appl. Phys. Lett. Volume: 110 Pages: 212905-212905
  • DOI: 10.1063/1.4984211
  • Peer Reviewed
• [Journal Article] Lead-Free Multilayer Piezoceramic Composites: Effect of Cosintering on Electromechanical Properties (2017)
  • Author(s): Ayrikyan Azatuhi、Kastner Andreas、Khansur Neamul Hayet、Yasui Shintaro、Itoh Mitsuru、Webber Kyle G.
  • Journal Title: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control Volume: 64 Pages: 1127-1134
  • DOI: 10.1109/tuffc.2017.2701882
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Crystal structure and magnetism in κ-Al2O3-type AlxFe2-xO3 films on SrTiO3(111) (2017)
  • Author(s): Hamasaki Yosuke、Shimizu Takao、Yasui Shintaro、Shiraishi Takahisa、Akama Akihiro、Kiguchi Takanori、Taniyama Tomoyasu、Itoh Mitsuru
  • Journal Title: Journal of Applied Physics Volume: 122 Pages: 015301-015301
  • DOI: 10.1063/1.4990947
  • Peer Reviewed
• [Journal Article] Thin-film perovskite electroluminescence with BaTiO3 films as insulating layers (2017)
  • Author(s): Takashima Hiroshi、Itoh Mitsuru
  • Journal Title: Ferroelectrics Volume: 512 Pages: 100-104
  • DOI: 10.1080/00150193.2017.1349993
  • Peer Reviewed
• [Journal Article] Epitaxial thin film growth of garnet-, GdFeO 3 -, and YMnO 3 -type LuFeO 3 using pulsed laser deposition (2017)
  • Author(s): Katayama Tsukasa、Hamasaki Yosuke、Yasui Shintaro、Miyahara Akiko、Itoh Mitsuru
  • Journal Title: Thin Solid Films Volume: 642 Pages: 41-44
  • DOI: 10.1016/j.tsf.2017.09.013
  • Peer Reviewed
• [Presentation] e-Fe2O3ナノ粒子へのLi+挿入とその挿入課程の調査 (2020)
  • Author(s): 安原 颯, 濵嵜 容丞, 阿尾 貴博, 稲熊 宜之, 北條 元, 安井 伸太郎, 伊藤 満
  • Organizer: 第67回応用物理学会春季学術講演会 （上智大, 四ッ谷キャンパス）
• [Presentation] k-Al2O3型 (Ga1-x/2Fe1-x/2)ScxO3単結晶の磁性と誘電性：（１）結晶構造と誘電性 (2019)
  • Author(s): 立山 昂輝, 太宰 卓朗, 安井 伸太郎, Jianding Yu, Yang Zhang, Hui Wang, Zhaoyang Xia, Jinghong Fang, 符 徳勝, 谷山 智康, 伊藤 満
  • Organizer: 日本物理学会2019年秋季大会 （岐阜大学）
• [Presentation] k-Al2O3型 (Ga1-x/2Fe1-x/2)ScxO3単結晶の磁性と誘電性：（２）磁性 (2019)
  • Author(s): 立山 昂輝, 太宰 卓朗, 安井 伸太郎, Jianding Yu, Yang Zhang, Hui Wang, Zhaoyang Xia, Jinghong Fang, 符 徳勝, 谷山 智康, 伊藤 満
  • Organizer: 日本物理学会2019年秋季大会 （岐阜大学）
• [Presentation] イオン性化合物における第三元素の役割 (2019)
  • Author(s): 伊藤 満
  • Organizer: 強的秩序とその操作に関する研究グループ第9回研究会
  • Invited
• [Presentation] ε-Fe2O3ナノ粒子へのLi+挿入とその磁気物性 (2019)
  • Author(s): 安原 颯, 濵嵜 容丞, 阿尾 貴博, 北條 元, 安井 伸太郎, 伊藤 満
  • Organizer: 強的秩序とその操作に関する研究グループ第9回研究会
• [Presentation] Sc置換GaFeO3単結晶の磁気特性 (2019)
  • Author(s): 立山 昂輝, 太宰 卓朗, 安井 伸太郎, Jianding Yu, Yang Zhang, Hui Wang, Zhaoyang Xia, Jinghong Fang, 谷山 智康, 伊藤 満
  • Organizer: 強的秩序とその操作に関する研究グループ第9回研究会
• [Presentation] 電気化学的手法によりLi挿入したε-Fe2O3ナノ粒子の磁性 (2019)
  • Author(s): 安原 颯, 濵嵜 容丞, 阿尾 貴博, 稲熊 宜之, 北條 元, 安井 伸太郎, 伊藤 満
  • Organizer: 2019年第80回応用物理学会秋季学術講演会 （北大・札幌キャンパス）
• [Presentation] Sc置換GaFeO3単結晶の磁気特性 (2019)
  • Author(s): 立山 昂輝, 太宰 卓朗, 安井 伸太郎, Yu Jianding, Zhang Yang, Wang Hui, Xia Zhaoyang, Fang Jinghong, 谷山 智康, 伊藤 満
  • Organizer: 2019年第80回応用物理学会秋季学術講演会 （北大・札幌キャンパス）
• [Presentation] 非ペロブスカイト型強誘電体 (2019)
  • Author(s): 伊藤 満, 安井 伸太郎, 濵嵜 容丞, 片山 司
  • Organizer: 東北大学金属材料研究所ワークショップ「強誘電体関連物質の機能発現に関する構造科学の新展開」
  • Invited
• [Presentation] Unconventional Ferroelectricity in k-alumina-type Multiferroic AFeO3 Thin Films (2019)
  • Author(s): Mitsuru Itoh
  • Organizer: 2019 International Symposium on New Piezoelectric Materials and Devices (Shanghai, China)
  • Int'l Joint Research / Invited
• [Presentation] Unconventional Ferroelectricity in k-alumina-type Multiferroic AFeO3 Thin Films (2019)
  • Author(s): Mitsuru Itch
  • Organizer: The Eleventh International Conference on High-Performance Ceramics (CICC-11) (Kunming, China)
  • Int'l Joint Research / Invited
• [Presentation] Multiferroic Properties of Orthorhombic AlxFe2-xO3 Thin Films (2019)
  • Author(s): Badari Narayana A. Rao, Shintaro Yasui, Tsukasa Katayama, and Mitsuru Itoh
  • Organizer: The 11th International Conference on the Science and Technology for Advanced Ceramics (STAC-11) (Tsukuba, Japan)
  • Int'l Joint Research
• [Presentation] AlxFe2-xO3 Epitaxial Thin Films with Large Electrocaloric Effect (2019)
  • Author(s): Badari Narayana Aroor Rao, Shintaro Yasui, and Mitsuru Itoh
  • Organizer: Joint ISAF-ICE-EMF- IWPM-PFM meeting 2019 (F2cπ2 2019) (Lausanne, Switzerland)
  • Int'l Joint Research
• [Presentation] Ferroelectric and Ferrimagnetic Properties of AlxFe2-xO3 Epitaxial Thin Films (2019)
  • Author(s): Badari Narayana Aroor Rao, Shintaro Yasui, Tsukasa Katayama, and Mitsuru Itoh
  • Organizer: 10th India - Japan Science & Technology Conclave (IC EAST 2019) (New Delhi, India)
  • Int'l Joint Research
• [Presentation] Iron-based Ferroelectric Thin Films (2019)
  • Author(s): Shintaro Yasui, Tsukasa Katayama, Yosuke Hamasaki, Takuya Osakabe, Takahisa Shiraishi, Akihiro Akama, Takenori Kiguchi, Ayako Konishi, Hiroki Moriwake, and Mitsuru Itoh
  • Organizer: The 4th International Symposium on Creation of Life Innovation Materials for Interdisciplinary and International Researcher Development (ILIM-4) (Sendai, Japan)
  • Int'l Joint Research
• [Presentation] Resistive Switching in AlFeO3 and GaFeO3 based Thin Film Heterostructures (2019)
  • Author(s): Badari Narayana Aroor Rao, Yefei Han, Shintaro Yasui, Tsukasa Katayama, and Mitsuru Itoh
  • Organizer: The 13th Pacific Rim Conference of Ceramic Societies (PACRIM 13) (Okinawa, Japan)
  • Int'l Joint Research
• [Presentation] Metastable Phase Engineering for Emergence of New Functions in Oxides (2019)
  • Author(s): Mitsuru Itch
  • Organizer: The 11th International Conference on Advanced Materials and Devices (ICAMD 2019) (Jeju, Korea)
  • Int'l Joint Research / Invited
• [Presentation] AI置換したε-Fe2O3薄膜の構造と物性 (2018)
  • Author(s): 濵嵜 容丞, 清水 荘雄, 安井 伸太郎, 白石 貴久, 赤間 章裕, 木口 賢紀, 谷山 智康, 伊藤 満
  • Organizer: 日本セラミックス協会第31回秋季シンポジウム （名古屋工業大学）
• [Presentation] k-Al2O3型構造GaFeO3薄膜の強誘電性とフェリ磁性 (2018)
  • Author(s): 安井 伸太郎, 片山 司, 越阪部 拓也, 濵嵜 容丞, 小西 綾子, 森分 博紀, 白石 貴久, 赤間 章裕, 木口 賢紀, 伊藤 満
  • Organizer: 日本セラミックス協会第31回秋季シンポジウム （名古屋工業大学）
• [Presentation] Ferroelectric and Magnetic Properties in Room-Temperature Multiferroic GaFeO3-type Thin Films (2018)
  • Author(s): T. Katayama, S. Yasui, Y. Hamasaki, and M. Itoh
  • Organizer: 第42回日本磁気学会学術講演会 （日大・駿河台キャンパス）
  • Invited
• [Presentation] Ferroelectric and Magnetic Properties of AlxFe2-xO3 Thin Films (2018)
  • Author(s): Badari Narayana Aroor Rao, Shintaro Yasui, Tsukasa Katayama, Tomoyasu Taniyama and Mitsuru Ito
  • Organizer: 第79回応用物理学会秋季学術講演会 （名古屋国際会議場）
• [Presentation] k-Al2O3型構造材料におけるユニークな強誘電特性 (2018)
  • Author(s): 安井 伸太郎, 片山 司, 濵嵜 容丞, 田口 綾子, 森分 博紀, 白石 貴久, 赤間 章裕, 木口 賢紀, 伊藤 満
  • Organizer: 第38回エレクトロセラミックス研究討論会
• [Presentation] Ferroelectricity Evolution Mechanism in k-alumina-type Oxides (2018)
  • Author(s): Mitsuru Itoh
  • Organizer: 14th RUSSIA/CIS /BALTIC/JAPAN Symposium on Ferroelectricity (RCBJSF 2018) (St.Petersburug, Russia)
• [Presentation] Preparation of GaFeO3 Single Crystal and Epitaxial Thin Films on Single Crystal (2018)
  • Author(s): K. Tachiyama, T. Katayama, T. Osakabe, T. Dazai, J. Yu, H. He, H. Wang, Y. Hamasaki, S. Yasui, T. Taniyama, and M. Itoh
  • Organizer: 2018 ISAF-FMA-AMF- AMEC- PFM Joint Conference (IFAAP 2018) (Hiroshima, Japan)
• [Presentation] Crystal Domain Structure and Properties in k-alumina-type AFeO3 Oxides (2018)
  • Author(s): Mitsuru Itoh
  • Organizer: The 6th International Workshop on Relaxor Ferroelectrics (IWRF-2018) (Vancouver, Canada)
  • Invited
• [Presentation] Characterization of Multiferroic Al2Fe2-xO3 Epitaxial Thin Films (2018)
  • Author(s): Badari Narayana Aroor Rao, Tsukasa Katayama, Shintaro Yasui, and Mitsuru Itoh
  • Organizer: 12th Japan-Korea Conference on Ferroelectrics (JKC-FE12) (Nara, Japan)
• [Presentation] Room Temperature Ferroelectricity in Multiferroic AlxFe2-xO3 Epitaxial Thin Films (2018)
  • Author(s): Badari Narayana Rao, Tsukasa Katayama, Shintaro Yasui, and Mitsuru Itoh
  • Organizer: 2018 MRS Fall Meeting (Boston, USA)
• [Presentation] Cation Substitution Effect in Ferroelectric k-Al2O3-type Oxides (2018)
  • Author(s): Mitsuru Itoh
  • Organizer: Fundamental Physics of Ferroelectrics and Related Materials 2018 (Ferro2018)
• [Presentation] Ferroelectricity and Magnetic Properties in k-Al2O3-type Oxides (2017)
  • Author(s): Mitsuru Itoh, Yosuke Hamasaki, Shintaro Yasui, Tsukasa Katayama, Takuya Osakabe, Tomoyasu Taniyama, Ayako Konishi, and Hiroki Moriwake
  • Organizer: 8th International Conference on Electroceramics
  • Int'l Joint Research / Invited
• [Presentation] Phase Control of Metastable ABO3 Oxides by PLD (2017)
  • Author(s): Mitsuru Itoh, Yosuke Hamasaki, Shintaro Yasui, Tsukasa Katayama, Tomoyasu Taniyama, Ayako Konishi, and Hiroki Moriwake
  • Organizer: Collaborative Conference on Materials Research (CCMR) 2017
  • Int'l Joint Research / Invited
• [Presentation] Coordination Engineering for New Ferroelectric Oxides: Unconventional Recombination of Cation-Oxygen Bonds During Polarization Switching (2017)
  • Author(s): Mitsuru Itoh
  • Organizer: 18th US-Japan Seminar on Dielectric and Piezoelectric Ceramics
  • Int'l Joint Research / Invited
• [Presentation] k-Al2O3型(A,Fe)2O3(A=Al,Ga,Fe,Sc,Rh,In)酸化物の強誘電性と磁性 (2017)
  • Author(s): 伊藤 満, 濵嵜 容丞, 片山 司, 越阪部 拓也, 安井 伸太郎, 谷山 智康
  • Organizer: 日本物理学会第72回年次大会
• [Presentation] 六方晶YMnO3型ScFeO3薄膜の構造と強誘電性 (2017)
  • Author(s): 濵嵜 容丞, 安井 伸太郎, 谷山 智康, 伊藤 満
  • Organizer: 日本セラミックス協会第30回秋季シンポジウム
• [Book] Handbook of Solid State Chemistry (2017)
  • Author(s): Mitsuru Itoh
  • Total Pages: 21
  • Publisher: Wiley
• [Remarks]
  • URL: https://www.msl.titech.ac.jp/~itohlab/
• [Remarks] 新しいメカニズムで発現する強誘電体を開発 ―磁性も備え、室温動作マルチフェロイックス新展開へ―
  • URL: https://www.titech.ac.jp/news/2017/040091.html