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Development research on high performance magnetic ceramics

Research Project

Project/Area Number 18K13989
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 26020:Inorganic materials and properties-related
Research InstitutionThe University of Tokyo

Principal Investigator

Namai Asuka  東京大学, 大学院理学系研究科(理学部), 准教授 (40632435)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords磁性セラミクス / ハード磁性 / 金属置換 / 磁気特性 / 電磁波吸収特性 / 磁性フェライト / ハードフェライト / ナノ粒子 / 分光 / 機能性金属酸化物 / 磁性材料
Outline of Final Research Achievements

In this project, magnetic ceramics, which are in high demand for high coercivity and high frequency, were studied with the aim of realizing high performance and new functions by metal substitution using epsilon iron oxide, which has large magnetic anisotropy, as a base material. An increase in coercivity by metal substitution, broadband absorption of high-frequency electromagnetic waves by natural resonance phenomenon, and high performance in absorption characteristics by compositing were achieved.

Academic Significance and Societal Importance of the Research Achievements

磁性セラミクスは、最も多く身の回りで用いられている磁性材料であるが、一般に磁気異方性が金属磁性材料と比べると小さく、その向上は材料分野において重要な命題の一つである。本研究課題で開発した磁性セラミクスは、磁気異方性の増大によりハード磁性体としての性能向上につながるものである。また、利用が拡大している高い周波数での電磁波吸収特性の実現、吸収特性の広帯域化および外場制御は、電磁環境保全技術につながることが期待される。

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

    (21 results)

All 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (3 results) Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results) Book (3 results) Remarks (4 results)

  • [Int'l Joint Research] ライプニッツ・ハノーバー大学(ドイツ)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] アヴェイロ大学(ポルトガル)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] ライプリッツ・ハノファー大学(ドイツ)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Resonance Frequency Tuning of a 200 GHz Band Absorber by an External Magnetic Field2022

    • Author(s)
      Tsukamoto Seiya、Oki Yurie、Imoto Kenta、Namai Asuka、Yoshikiyo Marie、Ohkoshi Shin-ichi
    • Journal Title

      Advanced Photonics Research

      Volume: 3 Issue: 5 Pages: 2100319-2100319

    • DOI

      10.1002/adpr.202100319

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Highly Efficient Broadband Millimeter‐Wave?Absorbing Ultrathin Films2021

    • Author(s)
      Kinugawa Rina、Imoto Kenta、Futakawa Yuhei、Shimizu Shoma、Fujiwara Rei、Yoshikiyo Marie、Namai Asuka、Ohkoshi Shin-ichi
    • Journal Title

      Advanced Engineering Materials

      Volume: 23 Issue: 4 Pages: 2001473-2001473

    • DOI

      10.1002/adem.202001473

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Broadband-Millimeter-Wave Absorber Based on ε-(TiIVCoII)xFeIII2-2xO3 for Advanced Driver Assistance Systems2020

    • Author(s)
      Asuka Namai, Koreyoshi Ogata, Marie Yoshikiyo, and Shin-ichi Ohkoshi
    • Journal Title

      The Bulletin of the Chemical Society of Japan

      Volume: 93 Issue: 1 Pages: 20-25

    • DOI

      10.1246/bcsj.20190254

    • NAID

      130007784859

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Crystal structure and magnetic properties of ε-RuxFe2-xO3 nanosize hard ferrite2018

    • Author(s)
      Namai Asuka、Ohkoshi Shin‐ichi
    • Journal Title

      Chemistry - A European Journal

      Volume: 24 Issue: 46 Pages: 11880-11884

    • DOI

      10.1002/chem.201802771

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] 高性能フェライト磁石の開発と次世代電磁波吸収材への展開2022

    • Author(s)
      生井飛鳥
    • Organizer
      日本化学会第102春季年会(2022)
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] The Formation of a Nanoscale Hard Magnetic Ferrite from Prussian Blue Nanocrystals2022

    • Author(s)
      J. MacDougall, A. Namai, S. Ohkoshi, M. Yoshikiyo
    • Organizer
      2022 Joint MMM-INTERMAG
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Broadband-millimeter-wave absorber based on Ti-Co substituted ε-iron oxide2020

    • Author(s)
      A. Namai, M. Yoshikiyo, S. Ohkoshi
    • Organizer
      65th Annual Conference on Magnetism and Magnetic Material (MMM2020)(国際学会)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] イプシロン酸化鉄の磁気特性と高周波ミリ波吸収特性2019

    • Author(s)
      生井飛鳥, 大越慎一
    • Organizer
      高周波磁性材料の実用化のための技術動向調査専門委員会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Coercive field enhancement effect by ruthenium substitution in ε-iron oxide nanomagnet2019

    • Author(s)
      Asuka Namai, Marie Yoshikiyo, Shin-ichi Ohkoshi
    • Organizer
      Phase Transition and Dynamical Properties of Spin Transition Materialsni (PDSTM2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Large coercive field of ruthenium substituted ε-iron oxide nanomagnet2019

    • Author(s)
      Asuka Namai, Shin-ichi Ohkoshi
    • Organizer
      2019 Joint MMM-Intermag Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] イプシロン酸化鉄ハード磁性フェライトの金属置換サイト位置効果2019

    • Author(s)
      生井飛鳥, 吉清まりえ, 大越慎一
    • Organizer
      日本化学会第99春季年会
    • Related Report
      2018 Research-status Report
  • [Book] 最新ミリ波吸収,遮蔽,透過材の設計・実用化技術2020

    • Author(s)
      大越慎一, 生井飛鳥
    • Total Pages
      252
    • Publisher
      シーエムシー出版
    • Related Report
      2020 Research-status Report
  • [Book] 電波吸収体・電磁波シールド材の開発最前線-5Gに向けた設計と高性能化-2020

    • Author(s)
      二川優平, 生井飛鳥, 大越慎一
    • Total Pages
      318
    • Publisher
      シーエムシー出版
    • Related Report
      2020 Research-status Report
  • [Book] 高周波対応部材の開発動向と5G、ミリ波レーダーへの応用2019

    • Author(s)
      大越慎一, 生井飛鳥
    • Total Pages
      9
    • Publisher
      技術情報協会
    • ISBN
      9784861047336
    • Related Report
      2018 Research-status Report
  • [Remarks] Researcher Map

    • URL

      https://researchmap.jp/Asuka_NAMAI

    • Related Report
      2021 Annual Research Report
  • [Remarks] Researcher Gate

    • URL

      https://www.researchgate.net/profile/Asuka-Namai-2

    • Related Report
      2021 Annual Research Report
  • [Remarks] 研究室HP

    • URL

      http://www.chem.s.u-tokyo.ac.jp/users/ssphys/

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
  • [Remarks] http://www.chem.s.u-tokyo.ac.jp/users/ssphys/

    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2023-01-30  

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