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Energy loss analysis in soft magnetic particles for high frequency region and development of its design method

Research Project

Project/Area Number 20H02179
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 21050:Electric and electronic materials-related
Research InstitutionTohoku University

Principal Investigator

Satoshi Okamoto  東北大学, 多元物質科学研究所, 教授 (10292278)

Co-Investigator(Kenkyū-buntansha) 島津 武仁  東北大学, 学際科学フロンティア研究所, 教授 (50206182)
吉田 栄吉  東北大学, 産学連携先端材料研究開発センター, 特任教授 (70500867)
田丸 慎吾  国立研究開発法人産業技術総合研究所, エレクトロニクス・製造領域, 主任研究員 (70773802)
菊池 伸明  東北大学, 多元物質科学研究所, 准教授 (80436170)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2022: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2021: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2020: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
Keywords軟磁性 / 高周波 / 磁気損失 / 電磁波抑制 / パワーデバイス / 磁気特性 / 磁波抑制
Outline of Research at the Start

5G通信における信号品質の確保やパワーデバイスのスイッチング周波数の高周波化に伴い,MHz帯からGHz帯における軟磁性微粒子の磁気損失制御が重要な課題となっている.現状ではデバイス実装が先行しており,この周波数帯域における磁気損失に関する学術的理解はほとんど進んでいない.本研究では,超高感度計測と大規模シミュレーションをベースとする磁気損失の起源解明ならびに所望の磁気損失特性を実現する設計手法の確立を目的とする.

Outline of Final Research Achievements

Magnetic soft materials are widely used in many devices as noise suppression sheet, passive devices in power electronics systems, and so on. Although the magnetic energy loss is a very important factor in these devices, the physical mechanism of magnetic energy loss has not been well understood for the frequency range from MHz to GHz, which is the most important frequency range for various practical applications. In this study, we performed high-sensitivity measurements of a single constituent particle of magnetic device, and its magnetic energy loss mechanism was analyzed using magnetic vortex theory. On the other hand, the magnetic energy loss in a bulk magnetic device was also studied by means of broad-band energy loss measurements. We clearly showed that the energy loss was well analyzed by the model based on magnetization reversal process.

Academic Significance and Societal Importance of the Research Achievements

軟磁性材料はモーターコアや電力変換、電磁波干渉抑制などに広く用いられており、現代社会において不可欠な材料の一つである。その重要性の反面、磁化挙動由来のエネルギー損失の理解が十分ではなく、持続可能性社会の実現に向けた超高効率電力利用のための重要課題となっている。本研究では、軟磁性材料におけるエネルギー損失メカニズムを、磁性素子の構成要素であるミクロスケールの単一粒子にまで立ち返り、高感度計測に基づく解析を実施した。またバルク磁性素子についても広帯域での損失測定を行い、それぞれの損失機構について解析し、低損失化に向けた重要な知見を得た。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (14 results)

All 2022 2021 2020

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (11 results) (of which Int'l Joint Research: 2 results,  Invited: 7 results)

  • [Journal Article] Thermal activation in microwave-assisted magnetization switching and its effect on the switching behavior of granular media2022

    • Author(s)
      Kikuchi Nobuaki、Sato Katsunari、Okamoto Satoshi、Kitakami Osamu、Shimatsu Takehito、Suto Hirofumi
    • Journal Title

      Physical Review B

      Volume: 105 Issue: 5

    • DOI

      10.1103/physrevb.105.054430

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Microwave-assisted switching in granular media with continuous magnetic overlayers for interaction control2022

    • Author(s)
      Kikuchi Nobuaki、Sato Katsunari、Shimatsu Takehito、Okamoto Satoshi
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 62 Issue: SB Pages: SB1015-SB1015

    • DOI

      10.35848/1347-4065/ac9910

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Thermal activation on microwave-assisted magnetization switching in Co/Pt nanodot arrays2022

    • Author(s)
      Mizutani Satoshi、Kikuchi Nobuaki、Hatayama Masatoshi、Shimatsu Takehito、Okamoto Satoshi
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 62 Issue: SB Pages: SB1012-SB1012

    • DOI

      10.35848/1347-4065/ac9533

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] Ultra-low loss magnetic materials for innovative power electronics2022

    • Author(s)
      Satoshi Okamoto
    • Organizer
      IPEC2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Approaches of ultra-low iron loss in magnetic materials and devices for power electronics2022

    • Author(s)
      Satoshi Okamoto
    • Organizer
      ICFPM 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ナノスケールハード磁性体の非線形磁化ダイナミクスを利用した次世代磁気記録技術2022

    • Author(s)
      岡本 聡
    • Organizer
      電気A部門大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 革新的パワーエレクトロニクスに向けた軟磁性材料およびデバイス開発2022

    • Author(s)
      岡本 聡
    • Organizer
      電気A部門大会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 次世代パワーエレクトロニクスに向けた軟磁性材料および磁気デバイス開発2022

    • Author(s)
      岡本 聡
    • Organizer
      日本金属学会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 次世代パワエレに向けた高磁束密度・低損失磁性材料およびデバイス創成への挑戦2022

    • Author(s)
      岡本 聡
    • Organizer
      INNOPELシンポジウム
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 2コイル法と共振法の併用によるセンダスト圧粉コアのブロードバンド鉄損測定2022

    • Author(s)
      小野暢久
    • Organizer
      日本磁気学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ディスク状微細加工磁性ドットアレイによる高周波電磁波吸収材特性2022

    • Author(s)
      彭牧天
    • Organizer
      日本磁気学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Fe単一扁平粒子の透磁率スペクトルの粒径依存性2021

    • Author(s)
      大沼智幸
    • Organizer
      第45回日本磁気学会学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ノイズ抑制シートにおける bimodal型複素透磁率スペクトルメカニズム2021

    • Author(s)
      五十嵐利行
    • Organizer
      第45回日本磁気学会学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 時間・空間的マルチスケール磁気機能解析とデバイス応用2020

    • Author(s)
      岡本聡
    • Organizer
      展開共同研究A研究会
    • Related Report
      2020 Annual Research Report
    • Invited

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Published: 2020-04-28   Modified: 2024-01-30  

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