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Creation of light-induced large magneto-dielectric devices using magnetic nanostructures

Research Project

Project/Area Number 19K22093
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 28:Nano/micro science and related fields
Research InstitutionKeio University

Principal Investigator

KAIJU Hideo  慶應義塾大学, 理工学部(矢上), 准教授 (70396323)

Co-Investigator(Kenkyū-buntansha) 西井 準治  北海道大学, 電子科学研究所, 教授 (60357697)
長浜 太郎  北海道大学, 工学研究院, 准教授 (20357651)
Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2020: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2019: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Keywordsスピントロニクス / ナノ構造 / 磁性 / 誘電率 / 光学
Outline of Research at the Start

電子の電荷とスピンの2つの自由度を利用する「スピントロニクス」は、今世紀に入り輝かしい発展を遂げてきた。中でも、強磁性層/絶縁層/強磁性層から構成される強磁性トンネル接合は室温にて巨大な磁気誘電効果を示すことから、近年、次世代の超高感度・低消費電力磁気メモリ素子として、国内外で大きな注目を集めている。本研究課題では、ナノ接合強磁性トンネル接合を用い、これにより光照射巨大磁気誘電デバイスの創製に挑戦する。本研究課題の推進は、光学、磁性、誘電性が互いに融合した新たな学際領域を創出させると同時に、次世代超高感度・低消費電力磁気メモリ素子の実現に向けた新しい設計指針を与えるものと期待できる。

Outline of Final Research Achievements

Magnetic granular devices, which consist of nanoparticles dispersed in an insulating matrix, show interesting phenomena related to magnetism, dielectrics, and light, such as magnetoresistance effect, magnetocapacitance effect, and Faraday effect. In this study, we investigate photo-induced magneto-dielectric effect and clarify the mechanism of the phenomena in two-dimensional magnetic granular. As a result, we successfully observe light-induced resistance (LR) effect and light-induced capacitance (LC) effect in two-dimensional magnetic granular. We can also explain the LR effect by quantum-mechanical tunneling (QMT) model and LC effect by Debye-Frohlich (DF) model, respectively.

Academic Significance and Societal Importance of the Research Achievements

本研究成果は、光学、磁性、誘電性が互いに融合した新たな学際領域を創出させると同時に、次世代超高感度・低消費電力磁気メモリ素子の実現に向けた新しい設計指針を与えるものと期待できる。

Report

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

    (28 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (9 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 9 results,  Open Access: 3 results) Presentation (15 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results) Remarks (2 results)

  • [Int'l Joint Research] ブラウン大学(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] ブラウン大学(米国)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Large magnetocapacitance beyond 420% in epitaxial magnetic tunnel junctions with an MgAl2O4 barrier2022

    • Author(s)
      K. Sato, H. Sukegawa, K. Ogata, G. Xiao and H. Kaiju
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1

    • DOI

      10.1038/s41598-022-11545-6

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Principle and Recent Advances in Tunnel Magnetocapacitance Effect2021

    • Author(s)
      H. Kaiju and T. Nagahama
    • Journal Title

      IEEJ Transactions on Fundamentals and Materials

      Volume: 141 Issue: 5 Pages: 270-278

    • DOI

      10.1541/ieejfms.141.270

    • NAID

      130008033214

    • ISSN
      0385-4205, 1347-5533
    • Year and Date
      2021-05-01
    • Related Report
      2021 Annual Research Report 2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Observation and theoretical calculations of voltage-induced large magnetocapacitance beyond 330% in MgO-based magnetic tunnel junctions2021

    • Author(s)
      K. Ogata, Y. Nakayama, G. Xiao, and H. Kaiju
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1

    • DOI

      10.1038/s41598-021-93226-4

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Sign Inversion Phenomenon of Voltage-induced Tunnel Magnetocapacitance2021

    • Author(s)
      T. Nakagawa, K. Ogata, Y. Nakayama, G. Xiao, and H. Kaiju
    • Journal Title

      Applied Physics Letters

      Volume: 118 Issue: 18

    • DOI

      10.1063/5.0050304

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Development of magnetic responsive random lasers fabricated by a laser-induced surface roughness2021

    • Author(s)
      H. Fujiwara, S. Kawaguchi, D. Yonekawa, and H. Kaiju
    • Journal Title

      Applied Physics Letters

      Volume: 119 Issue: 4 Pages: 041105-041105

    • DOI

      10.1063/5.0058284

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Voltage-induced Magnetocapacitance Effect in Magnetic Tunnel Junctions2020

    • Author(s)
      H. Kaiju
    • Journal Title

      Materia Japan

      Volume: 59 Issue: 4 Pages: 191-198

    • DOI

      10.2320/materia.59.191

    • NAID

      130007824775

    • ISSN
      1340-2625, 1884-5843
    • Year and Date
      2020-04-01
    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Tunnel magnetocapacitance in Fe/MgF2 single nanogranular layered films2020

    • Author(s)
      Msiska Robin、Honjo Shusaku、Asai Yuki、Arita Masashi、Tsurumaki-Fukuchi Atsushi、Takahashi Yasuo、Hoshino Norihisa、Akutagawa Tomoyuki、Kitakami Osamu、Fujioka Masaya、Nishii Junji、Kaiju Hideo
    • Journal Title

      Applied Physics Letters

      Volume: 116 Issue: 8 Pages: 082401-082401

    • DOI

      10.1063/1.5139702

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Enhancement of coercivity of self-assembled stacking of ferrimagnetic and antiferromagnetic nanocubes2020

    • Author(s)
      K. Sawano, K. Tsukiyama, M. Shimizu, M. Takasaki, Y. Oaki, T. Yamamoto, Y. Einaga, C. Jenewein, H. Colfen, H. Kaiju, T. Sato and H. Imai
    • Journal Title

      Nanoscale

      Volume: 12 Issue: 14 Pages: 7792-7796

    • DOI

      10.1039/c9nr10558a

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Room-temperature large magnetocapacitance effect in magnetic tunnel junctions2019

    • Author(s)
      H. Kaiju, T. Nagahama, O. Kitakami, J. Nishii and G. Xiao
    • Journal Title

      Bulletin of Topical Symposium of the Magnetics Society of Japan

      Volume: 224 Pages: 7-13

    • NAID

      40021988644

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 2次元磁気グラニュラーの光インピーダンス特性2021

    • Author(s)
      山内一弘, 本庄周作, 浅井佑基, 有田正志, 福地厚, 高橋庸夫, 海住英生
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Observation and theoretical calculation of spin transport in Ni78Fe22/molecules/Ni78Fe22 nanojunction devices2021

    • Author(s)
      K. Hayashi, Y. Sasaki, K. Senshu, T. Misawa, J. Nishii and H. Kaiju
    • Organizer
      34th International Microprocesses and Nanotechnology Conference
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 330%を超える巨大トンネル磁気キャパシタンス効果の観測とメカニズム解明2021

    • Author(s)
      緒方健太郎, 中山雄介, Gang Xiao, 海住英生
    • Organizer
      電気学会A部門マグネティックス研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 電圧誘起トンネル磁気キャパシタンスの符号反転現象2021

    • Author(s)
      中川健, 緒方健太郎, 中山雄介, Gang Xiao, 海住英生
    • Organizer
      日本物理学会2021年秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Spin transport properties in molecular nanojunction devices using magnetic thin-film edges2021

    • Author(s)
      林恭平, 佐々木悠馬, 千秋賀英子, 三澤貴浩, 西井準治, 海住英生
    • Organizer
      2021年第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] レーザー誘起表面凹凸構造形成法を利用した外部磁場応答ランダムレーザーの開発2021

    • Author(s)
      藤原英樹、海住英生
    • Organizer
      レーザー学会学術講演会第41回年次大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 局所レーザー加熱を用いたNi基板上へのグラファイト膜の選択合成2021

    • Author(s)
      藤原英樹,弥勒院達紀,大橋由梨, 海住英生,平井健二,雲林院宏
    • Organizer
      2021年第68回応用物理学会春季学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] Spin transport properties in Ni78Fe22/Mq3(M=Al, Er)/Ni78Fe22 nanoscale junction devices utilizing magnetic thin-film edges2020

    • Author(s)
      K. Senshu, Y. Sasaki, Y. Nakayama, T. Misawa, T. Komine, N. Hoshino, T. Akutagawa, M. Fujioka, J. Nishii and H. Kaiju
    • Organizer
      International Microprocesses and Nanotechnology Conference
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Ni78Fe22/Mq3(M = Al, Er)/Ni78Fe22ナノ接合素子における室温磁気抵抗効果2020

    • Author(s)
      千秋賀英子、佐々木悠馬、林恭平、中山雄介、三澤貴浩、小峰啓史、星野哲久、芥川智行、藤岡正弥、西井準治、海住英生
    • Organizer
      第44回日本磁気学会学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] 磁性薄膜エッジを利用したNi78Fe22/Mq3(M=Al, Er)/Ni78Fe22ナノ接合素子の電気磁気特性2020

    • Author(s)
      千秋賀英子、 佐々木悠馬、中山雄介、三澤 貴浩、小峰 啓史、星野 哲久、芥川 智行、藤岡 正弥、西井 準治、海住 英生
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Research-status Report
  • [Presentation] レーザー誘起表面凹凸を利用した外部磁場制御ランダムレーザーの作製2020

    • Author(s)
      藤原英樹、川口翔平、米川大樹、海住英生
    • Organizer
      2020年第67回応用物理学会春季学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Experimental and Theoretical Study on Tunnel Magnetocapacitance in Fe/MgF2 Nanogranular Films2019

    • Author(s)
      R. Msiska, S. Honjo, Y. Asai, M. Arita, A. T. Fukuchi, Y. Takahashi, N. Hoshino, T. Akutagawa, O. Kitakami, M. Fujioka, J. Nishii and H. Kaiju
    • Organizer
      The 6th Japan-Korea International Symposium on Materials Science and Technology 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Magnetocapacitance Effect in Spintronic Devices2019

    • Author(s)
      H. Kaiju, T. Nagahama, O. Kitakami, J. Nishii, and G. Xiao
    • Organizer
      The 6th Japan-Korea International Symposium on Materials Science and Technology 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 磁性粒子混合ランダムレーザーの外部磁場依存性2019

    • Author(s)
      藤原英樹、海住英生
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] 磁気キャパシタンス効果の新展開とその学理2019

    • Author(s)
      海住英生、長浜太郎、北上修、西井準治、Gang Xiao
    • Organizer
      第1回慶大スピントロニクス研究開発センター研究会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Remarks] 研究室ホームページ

    • URL

      https://www.kaiju.appi.keio.ac.jp/

    • Related Report
      2021 Annual Research Report 2020 Research-status Report
  • [Remarks] 研究室HP

    • URL

      https://www.kaiju.appi.keio.ac.jp/

    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-07-04   Modified: 2023-01-30  

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