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Creation and nanoscale observation of magnetic skyrmions at large spin-orbit coupling oxide heterostructures

Research Project

Project/Area Number 18K18935
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 26:Materials engineering and related fields
Research InstitutionTohoku University

Principal Investigator

Fukumura Tomoteru  東北大学, 材料科学高等研究所, 教授 (90333880)

Co-Investigator(Kenkyū-buntansha) 岡 博文  東北大学, 材料科学高等研究所, 助教 (70374600)
Project Period (FY) 2018-06-29 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2018: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Keywordsスピントロニクス / 走査型プローブ顕微鏡 / 酸化物エレクトロニクス / エピタキシャル成長 / スキルミオン
Outline of Final Research Achievements

We explored electronic and magnetic properties of rare-earth monoxides as new candidate materials that generate magnetic skyrmions. New ferromagnetic NdO and PrO and high pressure phase fcc type Pr epitaxial thin films were synthesized for the first time by pulse laser deposition (PLD). LaO / EuO heteroepitaxial structure showed clear spin Hall magnetoresistance in spite of no trace of magnetic skyrmions. Using low-temperature scanning tunneling microscopy with PLD, we performed in-situ experiments of SrVO3 ultrathin films and Pr thin films. In SrVO3 film, two surface reconstructions were observed to influence electronic states, which probably are connected with the metal-insulator transition. In Pr thin film, electronic standing waves were observed in their differential conductance maps.

Academic Significance and Societal Importance of the Research Achievements

次世代の高密度・低消費電力磁気メモリーの情報の担い手として磁気スキルミオンは注目を集めており、その発現原理の追求と共に、デバイス応用へ適した新たな材料系の開拓が望まれている。多彩な物性を示す希土類単酸化物とヘテロ構造は、その候補材料として有望であることを示す結果が得られ、それらの新物質を超高真空中でその場観察できる手法を構築できた。今後、磁気スキルミオン発現の原理追求や新奇スピントロニクスデバイスの開拓にも応用していく。また、高圧相のfcc構造をもつPr薄膜の合成成功は、常圧における高圧相物性の探索、例えば4f電子の遍歴化など、を可能にし、新たな機能性材料を生み出す可能性がある。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (36 results)

All 2020 2019 2018

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results) Presentation (33 results) (of which Int'l Joint Research: 17 results,  Invited: 6 results)

  • [Journal Article] Heteroepitaxy of Rock-salt Superconductor/Ferromagnet Thin Film: LaO/EuO2019

    • Author(s)
      Kaminaga Kenichi、Oka Daichi、Oka Hirofumi、Fukumura Tomoteru
    • Journal Title

      Chemistry Letters

      Volume: 48 Issue: 10 Pages: 1244-1247

    • DOI

      10.1246/cl.190460

    • NAID

      130007724104

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Itinerant ferromagnetism in rocksalt NdO epitaxial thin films2019

    • Author(s)
      Saito Daichi、Kaminaga Kenichi、Oka Daichi、Fukumura Tomoteru
    • Journal Title

      Physical Review Materials

      Volume: 3 Issue: 6

    • DOI

      10.1103/physrevmaterials.3.064407

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Two distinct surface terminations of SrVO3 (001) ultrathin films as an influential factor on metallicity2018

    • Author(s)
      Oka Hirofumi、Okada Yoshinori、Hitosugi Taro、Fukumura Tomoteru
    • Journal Title

      Applied Physics Letters

      Volume: 113 Issue: 17 Pages: 171601-171601

    • DOI

      10.1063/1.5051434

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Rock-salt type superconductor/ferromagnet heteroepitaxial junction: LaO/EuO2020

    • Author(s)
      K. Kaminaga, D. Oka, H. Oka, T. Fukumura
    • Organizer
      APS March Meeting 2020
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Thickness Dependent Magnetotransport Properties of Rocksalt NdO Epitaxial Thin Films2020

    • Author(s)
      Daichi Saito, Kenichi Kaminaga, Daichi Oka, Tomoteru Fukumura
    • Organizer
      GP-Spin Student Seminar
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Spatially resolved magnetic anisotropy of Co nanostructures2020

    • Author(s)
      Hirofumi Oka
    • Organizer
      GP-Spin Student Seminar
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Magnetotransport Properties in Rocksalt NdO/EuO Heterojunction2020

    • Author(s)
      Daichi Saito, Kenichi Kaminaga, Daichi Oka, Tomoteru Fukumura
    • Organizer
      GP-Spin Student Seminar
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Low-temperature scanning tunneling microscopy and spectroscopy studies of nano-scale electronic materials2020

    • Author(s)
      Hirofumi Oka, Tomoteru Fukumura
    • Organizer
      The 3rd Symposium for The Core Research Clusters for Materials Science and Spintronics
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Novel rare earth monoxides: fundamental properties and electronic states2020

    • Author(s)
      K. Kaminaga, H. Shimizu, N. Abe, T. Yamamoto, D. Saito, D. Oka, D. Shiga, M. Kitamura, H. Horiba, H. Kumigashira, T. Fukumura
    • Organizer
      The 3rd Symposium for The Core Research Clusters for Materials Science and Spintronics
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] スピンホール磁気抵抗を用いたLaOのスピンパラメータの導出2020

    • Author(s)
      神永 健一, 岡 大地, 岡 博文, 福村 知昭
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 岩塩型NdOエピタキシャル薄膜における磁気輸送特性の膜厚依存性2020

    • Author(s)
      齋藤 大地, 神永 健一, 岡 大地, 福村 知昭
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] PrOエピタキシャル薄膜におけるゼロに近い磁化をもつ遍歴強磁性の可能性2020

    • Author(s)
      清水 宙一, 阿部 展人, 山本 卓, 齋藤 大地, 神永 健一, 岡 大地, 福村 知昭
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] New ferromagnetic semiconductor: rare-earth monoxide GdO2019

    • Author(s)
      Taku Yamamoto, Kenichi Kaminaga, Daichi Saito, Daichi Oka, Tomoteru Fukumura
    • Organizer
      17th RIEC International Workshop on Spintronics and 10th JSPS Core-to-Core Workshop on "New-Concept Spintronic Devices"
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Local structures and electronic properties of single molecule magnets TbPc2 on SrVO3(001)2019

    • Author(s)
      Hirofumi Oka, Keiichi Katoh, Masahiro Yamashita, Tomoteru Fukumura
    • Organizer
      12th International Symposium on Atomic Level Characterizations for New Materials and Devices '19
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Heteroepitaxy of rock-salt superconductor/ferromagnet thin film: LaO/EuO2019

    • Author(s)
      K. Kaminaga, D. Oka, H. Oka, T. Fukumura
    • Organizer
      26th International Workshop on Oxide Electronics (iWOE 26)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Magnetization and Magnetotransport Studies of Rocksalt NdO Epitaxial Thin Films with Itinerant Ferromagnetism2019

    • Author(s)
      Daichi Saito, Kenichi Kaminaga, Daichi Oka, Tomoteru Fukumura
    • Organizer
      26th International Workshop on Oxide Electronics (iWOE 26)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] STM/STS study of single molecule magnets TbPc2 on SrVO3(001)2019

    • Author(s)
      Hirofumi Oka, Keiichi Katoh, Masahiro Yamashita, Tomoteru Fukumura
    • Organizer
      IBS Conference on Quantum Nanoscience
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Rich electric and magnetic functionalities in rare earth binary oxides2019

    • Author(s)
      T. Fukumura
    • Organizer
      The 11th International Conference on the Science and Technology for Advanced Ceramics (STAC-11)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Spin Hall magnetoresistance in LaO/EuO heteroepitaxial junction2019

    • Author(s)
      Kenichi Kaminaga, Daichi Oka, Hirofumi Oka, Tomoteru Fukumura
    • Organizer
      第24回半導体スピン工学の基礎と応用(PASPS-24)
    • Related Report
      2019 Annual Research Report
  • [Presentation] Magnetotransport of Epitaxial Thin Films and Heterojunction of Rocksalt NdO with Itinerant Ferromagnetism2019

    • Author(s)
      Daichi Saito, Kenichi Kaminaga, Daichi Oka, Tomoteru Fukumura
    • Organizer
      第24回半導体スピン工学の基礎と応用(PASPS-24)
    • Related Report
      2019 Annual Research Report
  • [Presentation] 希土類単酸化物CeOエピタキシャル薄膜のp型電気輸送特性2019

    • Author(s)
      阿部展人, 山本卓, 齋藤大地, 神永健一, 岡大地, 福村知昭
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] LaO/EuOヘテロエピタキシャル薄膜のスピンホール磁気抵抗2019

    • Author(s)
      神永 健一, 岡 大地, 岡 博文, 福村 知昭
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 新高温強磁性半導体:希土類単酸化物GdO2019

    • Author(s)
      山本 卓, 神永 健一, 斎藤 大地, 岡 大地, 福村 知昭
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] コア-シェル型Co-Niナノ構造における電子定在波の形成2019

    • Author(s)
      岡 博文, 米田忠弘
    • Organizer
      2019年日本物理学会秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] スピン偏極STMによるナノスケール磁気特性の開拓2019

    • Author(s)
      岡 博文
    • Organizer
      日本磁気学会「走査型トンネル顕微鏡/分光法を活用した物性研究の新展開」
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Magnetization and Magnetotransport Studies of an Itinerant Ferromagnet Rocksalt NdO Epitaxial Thin Films2019

    • Author(s)
      D. Saito, K. Kaminaga, D. Oka, T. Fukumura
    • Organizer
      Tohoku University GP-Spin seminar 2019
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Carrier and epitaxial strain control of superconductivity in LaO thin film2019

    • Author(s)
      K. Kaminaga, D. Oka, T. Hasegawa, T. Fukumura
    • Organizer
      APS 2019
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] New functional rare earth binary oxides2019

    • Author(s)
      T. Fukumura
    • Organizer
      Second Workshop of SG-SPIN
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Oxide electronics: converting insulators into electronic materials2019

    • Author(s)
      T. Fukumura
    • Organizer
      JSPS San Fransisco's 15-Year Anniversary Event: World Premier Research in Japan
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 岩塩型超伝導/強磁性ヘテロエピタキシャル薄膜:LaO/EuO2019

    • Author(s)
      神永 健一, 岡 大地, 岡 博文, 福村 知昭
    • Organizer
      第66回応用物理学会春季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] Coナノ磁石の磁気特性:スピン偏極STMによる研究2019

    • Author(s)
      岡 博文
    • Organizer
      顕微鏡学会研究会「超高空間分解能SPMの最前線」
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Spatially resolved magnetic anisotropy of Co islands on Au(111)2018

    • Author(s)
      H. Oka, P. Mishra, Z.-K. Qi, T. Komeda
    • Organizer
      2018 International Conference on Nanoscience + Technology (ICN+T)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Spatially resolved magnetic anisotropy of Co islands on Au(111)2018

    • Author(s)
      H. Oka, P. Mishra, Z.-K. Qi, T. Komeda
    • Organizer
      SPSTM-7 & LTSPM-1 International Conference 2018
    • Related Report
      2018 Research-status Report
  • [Presentation] 電気伝導性希土類単酸化物とBi 正方格子超伝導体の開拓2018

    • Author(s)
      山本 卓, 松本倖太, 齋藤大地, 寺門恭兵, 神永健一, 河底秀幸, 岡 大地, 福村知昭
    • Organizer
      第12回 物性科学領域横断研究会(領域合同研究会)
    • Related Report
      2018 Research-status Report
  • [Presentation] 異常原子価NdOエピタキシャル薄膜の強磁性と異常ホール効果2018

    • Author(s)
      齋藤 大地、神永 健一、岡 大地、福村 知昭
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] Co アイランドの磁気異方性エネルギーの膜厚依存性2018

    • Author(s)
      岡 博文、Mishra Puneet、Qi Zhi-Kun、米田忠弘
    • Organizer
      2018年日本表面真空学会学術講演会
    • Related Report
      2018 Research-status Report

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Published: 2018-07-25   Modified: 2021-02-19  

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