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Fabrication of brain-inspired devices by control of Fe valence state in iron oxides

Research Project

Project/Area Number 18K18850
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 21:Electrical and electronic engineering and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Munetoshi Seki  東京大学, 大学院工学系研究科(工学部), 准教授 (40432439)

Project Period (FY) 2018-06-29 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Keywords酸化鉄 / スピングラス / パルスレーザー堆積法 / 酸化鉄結晶薄膜 / 酸化鉄薄膜 / 脳型素子 / クラスターグラス
Outline of Final Research Achievements

New cluster-glass materials were fabricated, and their physical properties were investigated towards the creation of room-temperature brain-mimic devices. Especially, cluster-glass thin films with high glass-transition temperature and high responsivity to light irradiation were successfully fabricated using iron oxides with a spinel-type crystal structure as host materials. It was found that the carrier type of these films can be controlled by modulating the valence state of cations in the films. Furthermore, the propagation of spin-wave was successfully observed in the cluster-glass Al-substituted γ-Fe2O3 thin films. This result can be utilized in the development of the devices with ultra-low energy consumption.

Academic Significance and Societal Importance of the Research Achievements

本研究では、高温クラスターグラスを発現する物質を作製し、その磁気特性の光制御を実現しただけでなく、グラス状態を室温においてスピン波伝搬の形で簡易かつ高感度で検出することに成功した。この成果は、莫大な消費電力のもと決定論的作動を高速で行う従来のノイマン型コンピュータに代わる、柔軟かつ超低消費電力型の革新的情報処理システムの実現への道を開くものであると考えられる。また、本研究で扱った材料・素子を構成する元素の多くが、Fe(クラーク数4位)、O(1位)、Si(2位)、Mg(8位)等の地球上に豊富に存在する資源であることは、産業応用の観点から大きな意義を持っている。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (34 results)

All 2022 2021 2020 2019 2018

All Journal Article (11 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 11 results,  Open Access: 4 results) Presentation (21 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results) Book (2 results)

  • [Journal Article] Multifrequency Spin-Wave Propagation for Parallel Data Processing Using Microstructured Yttrium Iron Garnet Thin Films2022

    • Author(s)
      Sarker Md Shamim、Nakamura Shumpei、Yamahara Hiroyasu、Seki Munetoshi、Tabata Hitoshi
    • Journal Title

      IEEE Transactions on Magnetics

      Volume: 58 Issue: 2 Pages: 1-6

    • DOI

      10.1109/tmag.2021.3087812

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Flexoelectric nanodomains in rare-earth iron garnet thin films under strain gradient2021

    • Author(s)
      Yamahara Hiroyasu、Feng Bin、Seki Munetoshi、Adachi Masaki、Sarker Md Shamim、Takeda Takahito、Kobayashi Masaki、Ishikawa Ryo、Ikuhara Yuichi、Cho Yasuo、Tabata Hitoshi
    • Journal Title

      Communications Materials

      Volume: 2 Issue: 1 Pages: 95-95

    • DOI

      10.1038/s43246-021-00199-y

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Control of Magnetic Properties of Barium Ferrite Thin Films With Unusual Valence Fe2021

    • Author(s)
      Sakuda Masahiro、Yamahara Hiroyasu、Tabata Hitoshi、Seki Munetoshi
    • Journal Title

      Frontiers in Materials

      Volume: 8

    • DOI

      10.3389/fmats.2021.732676

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Efficient spin-wave transmission in epitaxial thin films of defect spinel γ-Fe2?xAlxO32021

    • Author(s)
      Tang Siyi、Sarker Md Shamim、Ma Kaijie、Yamahara Hiroyasu、Tabata Hitoshi、Seki Munetoshi
    • Journal Title

      Applied Physics Letters

      Volume: 119 Issue: 8 Pages: 082402-082402

    • DOI

      10.1063/5.0060102

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Self-organized nanostructures in magnetic CoGa0.8Mn1.2O4 thin films fabricated by pulsed laser deposition2021

    • Author(s)
      Chen Jiaxin、Seki Munetoshi、Sarker Md Shamim、Yamahara Hiroyasu、Tabata Hitoshi
    • Journal Title

      Journal of Crystal Growth

      Volume: 563 Pages: 126103-126103

    • DOI

      10.1016/j.jcrysgro.2021.126103

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] InFeO3 photoelectrode with two-dimensional superlattice for visible- and ultraviolet-light-driven water splitting2020

    • Author(s)
      B. Zhang, M. Seki, H. Zhou, J. Chen, and H. Tabata
    • Journal Title

      APL Materials

      Volume: 8 Issue: 5 Pages: 051107-051107

    • DOI

      10.1063/5.0003251

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] High temperature spin cluster glass behavior in Co- and Si-substituted garnet ferrite thin films2020

    • Author(s)
      Hiroyasu Yamahara, Munetoshi Seki, Hitoshi Tabata
    • Journal Title

      Journal of Magnetism and Magnetic Materials

      Volume: 501 Pages: 1664371-9

    • DOI

      10.1016/j.jmmm.2020.166437

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Hybridization between the ligand p band and Fe?3d orbitals in the p-type ferromagnetic semiconductor (Ga,Fe)Sb2020

    • Author(s)
      Takeda Takahito、Suzuki Masahiro、Anh Le Duc、Tu Nguyen Thanh、Schmitt Thorsten、Yoshida Satoshi、Sakano Masato、Ishizaka Kyoko、Takeda Yukiharu、Fijimori Shin-ichi、Seki Munetoshi、Tabata Hitoshi、Fujimori Atsushi、Strocov Vladimir N.、Tanaka Masaaki、Kobayashi Masaki
    • Journal Title

      Physical Review B

      Volume: 101 Issue: 15 Pages: 155142-155142

    • DOI

      10.1103/physrevb.101.155142

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] High‐Mobility 2D Hole Gas at a SrTiO3 Interface2020

    • Author(s)
      Le Duc Anh, Shingo Kaneta, Masashi Tokunaga, Munetoshi Seki, Hitoshi Tabata, Masaaki Tanaka, Shinobu Ohya
    • Journal Title

      Advanced Materials

      Volume: - Issue: 14 Pages: 1906003-1906003

    • DOI

      10.1002/adma.201906003

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Efficient intrinsic spin-to-charge current conversion in an all-epitaxial single-crystal perovskite-oxide heterostructure of La0.67Sr0.33MnO3/LaAlO3/SrTiO32020

    • Author(s)
      Shinobu Ohya, Daisei Araki, Le Duc Anh, Shingo Kaneta, Munetoshi Seki, Hitoshi Tabata, and Masaaki Tanak
    • Journal Title

      Physical Review Research

      Volume: 2 Issue: 1

    • DOI

      10.1103/physrevresearch.2.012014

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Bandgap engineering in V-substituted α-Fe<sub>2</sub>O<sub>3</sub> photoelectrodes2019

    • Author(s)
      A. Sathe, M. Seki, H. Zhou, J. Chen, H. Tabata
    • Journal Title

      Applied Physics Express

      Volume: 12 Issue: 9 Pages: 091003-091003

    • DOI

      10.7567/1882-0786/ab37b1

    • NAID

      210000156868

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] レーザーアブレーションを用いた酸化鉄ナノワイヤの自己形成技術の開発2022

    • Author(s)
      山口 達也、李 海寧、山原 弘靖、田畑 仁、関 宗俊
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] CoFeB/Y3Fe5O12 bilayer resonator for magnonic control and magnetic sensor application2022

    • Author(s)
      Shamim Sarker、Hiroyasu Yamahara、Siyi Tang、Zhiqiang Liao、Munetoshi Seki、Hitoshi Tabata
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Improving the Success Rate of Coherent Ising Machine for Solving Optimization Problems through Gaussian Colored Noise2022

    • Author(s)
      Zhiqiang Liao、Kaijie Ma、Md Shamim Sarker、Siyi Tang、Hiroyasu Yamahara、Munetoshi Seki、Hitoshi Tabata
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Multifrequency Spin Wave Device for Parallel Data Processing Using Micro Structured Yttrium Iron Garnet Thin Films2021

    • Author(s)
      M. Sarker, S. Nakamura, H. Yamahara, M. Seki and H. Tabata
    • Organizer
      INTERMAG21
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Spin wave propagation characteristics of defect spinel epitaxial γ-Fe2-xAlxO3 thin films for magnonic computing applications2021

    • Author(s)
      S. Tang, MS. Sarker, K. Ma, H. Yamahara, H. Tabata, M. Seki
    • Organizer
      International Workshop on Oxide Electronics 27(iWOE27)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Room-temperature Ferromagnetic Behavior and Giant Seebeck Coefficient in Fe2-xTi1+xO5 Solid Solution Thin Films2021

    • Author(s)
      Haining Li, Hiroyasu Yamahara, Hitoshi Tabata and Munetoshi Seki
    • Organizer
      International Workshop on Oxide Electronics 27(iWOE27)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Electrically tunable YIG magnon FET based on the ionic polymeric gate stack2021

    • Author(s)
      Md Shamim Sarker, Hiroyasu Yamahara, Munetoshi Seki, Hitoshi Tabata
    • Organizer
      International Workshop on Oxide Electronics 27(iWOE27)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Multifrequency Magnon Propagation for Parallel Data Processing using Micro Struc-tured Yttrium Iron Garnet Thin Films2021

    • Author(s)
      M. Sarker, S. Nakamura, H. Yamahara, M. Seki and H. Tabata
    • Organizer
      The 26th Symposium on Physics and Applications of Spin-related Phenomena in Semiconductors(PASPS-26)
    • Related Report
      2021 Annual Research Report
  • [Presentation] Magnetic and Dielectric Properties of Strain-gradient Rare-earth Iron Garnet Thin Films2021

    • Author(s)
      Hiroyasu Yamahara, Munetoshi Seki, Masaki Kobayashi and Hitoshi Tabata
    • Organizer
      The 26th Symposium on Physics and Applications of Spin-related Phenomena in Semiconductors(PASPS-26)
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Electrically tunable magnon FET controlled by ionic polymer gate2021

    • Author(s)
      Shamim Sarker、Hiroyasu Yamahara、Munetoshi Seki、Hitoshi Tabata
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Spin wave propagation characteristics of defect spinel epitaxial γ-Fe2-xAlxO3 thin films for magnonics applications2021

    • Author(s)
      Siyi Tang、Md. Shamim Sarker、Kaijie Ma、Hiroyasu Yamahara、Munetoshi Seki、Hitoshi Tabata
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 異常原子価鉄イオンを含むBaFeO3薄膜の磁気特性の制御2021

    • Author(s)
      作田 政大、山原 弘靖、関 宗俊、田畑 仁
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] Multifrequency Spin Wave Device for Parallel Data Processing using Micro Structured Yttrium Iron Garnet Thin Films2021

    • Author(s)
      Shamim Sarker、Shumpei Nakamura、Hiroyasu Yamahara、Munetoshi Seki、Hitoshi Tabata
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] Room Temperature Ferromagnetic Behaviors in Fe2-xTi1+xO5 Solid Solution Thin Films Fabricated by a Pulsed Laser Deposition2021

    • Author(s)
      Haining Li、Masahiro Sakuda、Hiroyasu Yamahara、Munetoshi Seki、Hitoshi Tabata
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] Control of Magnetic properties of spinel ferrite thin film for magnonic applications2021

    • Author(s)
      Siyi Tang、Md. Shamim Sarker、Hiroyasu Yamahara、Munetoshi Seki、Hitoshi Tabata
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] 磁気円二色性分光による傾斜格子歪希土類鉄ガーネットの磁気構造解析2020

    • Author(s)
      山原 弘靖、武田 崇仁、関 宗俊、小林 正起、田畑 仁
    • Organizer
      第81回応用物理学会秋季学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] 傾斜格子歪み希土類鉄ガーネットにおけるフレクソ分極とフェリ磁性の共存2019

    • Author(s)
      山原 弘靖、Sarker Md. Shamim、関 宗俊、長 康雄、田畑 仁
    • Organizer
      第80回秋季応用物理学会学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Theoretical understanding of the efficient intrinsic spin-to-charge current conversion in La0.67Sr0.33MnO3/LaAlO3/SrTiO32019

    • Author(s)
      大矢 忍、荒木 大晴、Anh Le Duc、金田 真悟、関 宗俊、田畑 仁、田中 雅明
    • Organizer
      第80回秋季応用物理学会学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] 鉄酸化物薄膜における電気磁気特性の室温制御2019

    • Author(s)
      関 宗俊
    • Organizer
      CSRN-Tokyo Workshop 2019「スピントロニクス新機能物質と巨大物性応答」
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Co,Si置換Lu3Fe5O12スピンクラスターグラス薄膜における低温スローダイナミクスとスピン波励起寿命2019

    • Author(s)
      山原 弘靖、Sarkar Md Shamim、鈴木 雄大、関 宗俊、田畑 仁
    • Organizer
      第66回応用物理学会春季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] 希土類鉄ガーネット薄膜における成長レートと格子歪み相関2018

    • Author(s)
      加藤木章浩、山原弘靖、関宗俊、田畑仁
    • Organizer
      第78回応用物理学会秋季学術講演会
    • Related Report
      2018 Research-status Report
  • [Book] 磁性材料の最新開発事例と各種応用技術(第8章1節 室温光・磁気・電子機能素子応用に向けた酸化鉄単結晶薄膜の磁気制御)2018

    • Author(s)
      関 宗俊、足立 真輝く、山原 弘靖、田畑 仁
    • Total Pages
      4
    • Publisher
      技術情報協会
    • Related Report
      2018 Research-status Report
  • [Book] Iron Ores and Iron Oxide Materials (Chapter title: Bandgap-Engineered Iron Oxides for Solar Energy Harvesting)2018

    • Author(s)
      Munetoshi Seki
    • Total Pages
      7
    • Publisher
      IntechOpen
    • Related Report
      2018 Research-status Report

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Published: 2018-07-25   Modified: 2023-12-25  

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