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Demonstration of low power consumption memory device using electric field induced magnetization reversal

Research Project

Project/Area Number 21K18891
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 29:Applied condensed matter physics and related fields
Research InstitutionTokyo Institute of Technology

Principal Investigator

Azuma Masaki  東京工業大学, 科学技術創成研究院, 教授 (40273510)

Co-Investigator(Kenkyū-buntansha) 金子 智  地方独立行政法人神奈川県立産業技術総合研究所, 電子技術部, グループリーダー (40426359)
重松 圭  東京工業大学, 科学技術創成研究院, 助教 (40754578)
Project Period (FY) 2021-07-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2022: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2021: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Keywords強磁性強誘電体 / 電場印加磁化反転 / ナノドット / 磁気センサー / 磁気メモリ / 微細加工 / ホールセンサー
Outline of Research at the Start

傾角スピン構造による自発磁化と強誘電性が共存するBiFe1-xCoxO3薄膜に微細加工を施し、磁気メモリデバイスとしての動作を検証する。微細加工を施した薄膜試料で、電気分極・磁気ドメインの単純化・単一化を達成し、電場印加磁化反転のデバイス動作を実現する。磁気情報書き込みに用いる磁場を発生するための電流が不要なため、超低消費電力の磁気メモリデバイスを実現できる。

Outline of Final Research Achievements

BiFe0.9Co0.1O3 (BFCO) has spontaneous magnetization perpendicular to electric polarization and magnetization reversal upon polarization reversal by electric field, which is expected to be applied to ultra-low power consumption memory with electric field write magnetic readout. Single-domain nanodots were successfully fabricated by deposition using anodized porous alumina as a mask. InSb, which acts as a Hall sensor, was deposited on the BFCO thin film, and it was confirmed that the reversal of an external magnetic field of 1 Oe can be detected.

Academic Significance and Societal Importance of the Research Achievements

BiFe0.9Co0.1O3の強誘電・強磁性シングルドメイン化に必要なサイズを明らかにしたこと、さらにInSbが磁化反転検出のセンサーとして用いられる事を確認したことで、電場書き込み磁気読み出しの超低消費電力メモリ応用への道筋が明らかになった。学術的にも社会的にも意義深い成果で、研究を継続する必要がある。

Report

(3 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • Research Products

    (31 results)

All 2023 2022 2021 Other

All Int'l Joint Research (2 results) Journal Article (6 results) (of which Peer Reviewed: 6 results,  Open Access: 2 results) Presentation (19 results) (of which Int'l Joint Research: 9 results,  Invited: 4 results) Remarks (1 results) Patent(Industrial Property Rights) (3 results) (of which Overseas: 1 results)

  • [Int'l Joint Research] UC Berkeley(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] カリフォルニア大学バークレー校(米国)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Magnetic Domain Change Induced by In‐Plane Electric Polarization Switching in Bi(Fe, Co)O3 Thin Film2023

    • Author(s)
      Shigematsu Kei、Katsumata Marin、Itoh Takuma、Ozawa Keita、Shimizu Haruki、Shimizu Keisuke、Azuma Masaki
    • Journal Title

      Advanced Physics Research

      Volume: - Issue: 12 Pages: 2200099-2200099

    • DOI

      10.1002/apxr.202200099

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Out-of-plane polarization reversal and changes in in-plane ferroelectric and ferromagnetic domains of multiferroic BiFe0.9Co0.1O3 thin films by water printing2023

    • Author(s)
      Itoh Takuma、Shigematsu Kei、Nishikubo Takumi、Azuma Masaki
    • Journal Title

      Scientific Reports

      Volume: 13 Issue: 1 Pages: 7236-7236

    • DOI

      10.1038/s41598-023-34386-3

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Heteroepitaxial growth of InSb thin film on SrTiO3 (001) by pulsed laser deposition for magnetic Hall sensor application2022

    • Author(s)
      Lee Koomok、Shigematsu Kei、Azuma Masaki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 61 Issue: 8 Pages: 080902-080902

    • DOI

      10.35848/1347-4065/ac7bf3

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Exploring the correlation between the spin-state configuration and the magnetic order in Co-substituted BiFeO32022

    • Author(s)
      Lee Koomok、Shigematsu Kei、Das Hena、Azuma Masaki
    • Journal Title

      Physical Review Materials

      Volume: 6 Issue: 6 Pages: 64401-64401

    • DOI

      10.1103/physrevmaterials.6.064401

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Control of ferroelectric and ferromagnetic domains in BiFe<sub>0.9</sub>Co<sub>0.1</sub>O<sub>3</sub> thin films by utilizing trailing fields2022

    • Author(s)
      Itoh Takuma、Katsumata Marin、Shigematsu Kei、Azuma Masaki
    • Journal Title

      Applied Physics Express

      Volume: 15 Issue: 2 Pages: 023002-023002

    • DOI

      10.35848/1882-0786/ac4359

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Stabilization of correlated ferroelectric and ferromagnetic domain structures in BiFe0.9Co0.1O3 films2021

    • Author(s)
      Katsumata Marin、Shigematsu Kei、Itoh Takuma、Shimizu Haruki、Shimizu Keisuke、Azuma Masaki
    • Journal Title

      Applied Physics Letters

      Volume: 119 Issue: 13 Pages: 132901-132901

    • DOI

      10.1063/5.0061508

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] Magnetization Reversal by Electric Field at Room Temperature in Co Substituted Bismuth Ferrite Thin Film2022

    • Author(s)
      Masaki Azuma
    • Organizer
      CIMTEC 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] MAGNETIZATION REVERSAL BY ELECTRIC FIELD AT ROOM TEMPERATURE IN Co SUBSTITUTED BISMUTH FERRITE THIN FILM2022

    • Author(s)
      Masaki Azuma
    • Organizer
      International Materials Research Congress 202
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Magnetization reversal by electric field in Co-substituted BiFeO3 under a control of domains by trailing fields2022

    • Author(s)
      Kei Shigematsu
    • Organizer
      ISFD-15
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Magnetization Reversal in BiFe0.9Co0.1O3 Thin Films 1- Spin Structure and Magnetization Reversal by Electric Field at Room Temperature in Co-Substituted Bismuth Ferrite Thin Film2022

    • Author(s)
      Kei Shigematsu
    • Organizer
      2023 MRS Fall Meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Magnetization Reversal in BiFe0.9Co0.1O3 Thin Films 2 - Control of Ferroelectric and Ferromagnetic Domains by Trailing Fields2022

    • Author(s)
      Takuma Ito
    • Organizer
      2023 MRS Fall Meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Exploring the Correlation Between the Spin-State Configuration and the Magnetic Order in Co-Substituted BiFeO32022

    • Author(s)
      Koomok Lee
    • Organizer
      2023 MRS Fall Meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Co 置換BiFeO3上へのInSb磁気センサ薄膜の製作2022

    • Author(s)
      Koomok Lee
    • Organizer
      第39回強誘電体応用会議
    • Related Report
      2022 Annual Research Report
  • [Presentation] 伊藤拓真2022

    • Author(s)
      強誘電性・強磁性を併せ持つBiFe0.9Co0.1O3薄膜のWater printing による面外分極反転とドメイン制御
    • Organizer
      第39回強誘電体応用会議
    • Related Report
      2022 Annual Research Report
  • [Presentation] Co 置換BiFeO3上へのInSb 磁気センサ薄膜の製作2022

    • Author(s)
      李 邱穆
    • Organizer
      第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] (110)配向マルチフェロイックBiFe0.9Co0.1O3薄膜の面内 電場印加による強誘電性・強磁性ドメイン構造変化2022

    • Author(s)
      伊藤 拓真
    • Organizer
      第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Theoretical investigations of the canted antiferromagnetism in Co doped BiFeO32022

    • Author(s)
      Koomok Lee, Hena Das, Kei Shigematsu, Masaki Azuma
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Water printingによる マルチフェロイックBiFe0.9Co0.1O3 薄膜の面外分極反転と強誘電性・強磁性 ドメイン制御2022

    • Author(s)
      伊藤 拓真、重松 圭 、東 正樹
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Direct Observation of Magnetization Reversal by Polarization Switching in Multiferroic Cobalt-Substituted Bismuth Ferrite Thin Film2021

    • Author(s)
      Kei Shigematsu, Masaki Azuma
    • Organizer
      8th International Congress on Ceramics(ICC8)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Control of ferromagnetic and ferroelectric domains in BiFe0.9Co0.1O3 thin films by utilizing trailing fields2021

    • Author(s)
      Takuma Itoh, Marin Katsumata, Kei Shigematsu, Masaki Azuma
    • Organizer
      International Symposium on Applications of Ferroelectrics (ISAF2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Observation of ferroelectric and ferromagnetic domains of BiFe0.9Co0.1O3 nanodot array by using anodic porous alumina mask2021

    • Author(s)
      Kei Shigematsu, Keita Ozawa, Marin Katsumata, Masaki Azum
    • Organizer
      MATERIALS RESEARCH MEETING(MRM)2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Co置換BiFeO3薄膜における電場印加磁化反転2021

    • Author(s)
      東正樹
    • Organizer
      ナノ学会第19回大会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 強誘電性・強磁性が共存するBiFe0.9Co0.1O3薄膜のtrailing fieldを用いたドメイン制御2021

    • Author(s)
      伊藤拓真、勝俣 真綸、重松 圭、東 正樹
    • Organizer
      強誘電体会議FMA
    • Related Report
      2021 Research-status Report
  • [Presentation] 酸化物基板上へのInSbエピタキシャル薄膜の製作2021

    • Author(s)
      Koomok Lee、重松圭、東正樹
    • Organizer
      応用物理学会秋季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] マルチフェロイックBiFe0.9Co0.1O3薄膜におけるtrailing fieldを用いた強誘電性・強磁性ストライプドメイン形成と制御2021

    • Author(s)
      伊藤 拓真、勝俣 真綸、 重松 圭、東 正樹
    • Organizer
      粉体粉末冶金2021年度秋季大会
    • Related Report
      2021 Research-status Report
  • [Remarks] 住友化学と「住友化学次世代環境デバイス協働研究拠点」を設置

    • URL

      https://www.titech.ac.jp/news/2023/066271

    • Related Report
      2022 Annual Research Report
  • [Patent(Industrial Property Rights)] 磁気メモリ素子、並びに磁気メモリ素子の情報の 書き込みおよび読み取り方法2023

    • Inventor(s)
      東正樹、重松圭、伊藤拓真
    • Industrial Property Rights Holder
      東京工業大学、KISTEC
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2023-034780
    • Filing Date
      2023
    • Related Report
      2022 Annual Research Report
  • [Patent(Industrial Property Rights)] ホール素子の製造方法及び磁気メモリ素子2023

    • Inventor(s)
      東正樹、重松圭、LEE Koomok
    • Industrial Property Rights Holder
      東京工業大学、KISTEC
    • Industrial Property Rights Type
      特許
    • Filing Date
      2023
    • Related Report
      2022 Annual Research Report
    • Overseas
  • [Patent(Industrial Property Rights)] ホール素子の製造方法及び磁気メモリ素子2022

    • Inventor(s)
      東 正樹、重松 圭、李 邱穆
    • Industrial Property Rights Holder
      地方独立行政法人神奈川県立産業技術総合研究所
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-048131
    • Filing Date
      2022
    • Related Report
      2021 Research-status Report

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Published: 2021-07-13   Modified: 2024-01-30  

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