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2023 年度 実施状況報告書

A new material landscape of rare-earth intermetallics for exploration non-trivial topological spin textures

研究課題

研究課題/領域番号 23K13069
研究機関東京大学

研究代表者

ヌイェン カーン  東京大学, 大学院工学系研究科(工学部), 特任助教 (50775608)

研究期間 (年度) 2023-04-01 – 2025-03-31
キーワードMagnetism / Skyrmion / Topology / Intermetallics / centrosymmetric
研究実績の概要

This project aims to focus on material exploration and formation mechanism of magnetic skyrmions and other topological spin textures in intermetallics RT2SX2 "122" (R: rare-earth, T: transition metal elements). In the initial phase, we successfully synthesized several materials exhibiting intriguing features in magnetic and transport properties. An example of this is NdRu2Si2, which shows intriguing magnetic orders such as stripe single-Q state and checkerboard double-Q state under the presence of a magnetic field. Depending on the magnetic structure, non-trivial behaviors in transport properties and neutron diffraction can be observed, suggesting this material as a promising platform for investigating the interplay between topological characteristics, magnetism and transport properties.

現在までの達成度 (区分)
現在までの達成度 (区分)

2: おおむね順調に進展している

理由

Aligned with the goals of this project, we have successfully synthesized single crystals of various intermetallic materials with the "122" structure, which is crucial for investigating intriguing magnetic and transport properties. This effort is particularly significant as we collaborate with researchers from diverse disciplines, such as theoretical studies and neutron diffraction research. These factors contribute to the smooth progress of the current project.

今後の研究の推進方策

For the second phase of this project, we aim to expand the project's scope in terms of material development. Additionally, we plan to summarize the ongoing results into a comprehensive research article. Collaborating with theorists and quantum beam research scientists, we aim to delve deeper into the stabilization mechanism of these magnetic structures. Our overarching goal is to derive guiding principles for material design based on the insights gained from these investigations. This strategic approach not only broadens the project's horizons but also sets the stage for impactful contributions to the field of materials science and technology.

次年度使用額が生じた理由

The remaining funding will be allocated towards covering expenses related to conducting experiments at a quantum beam facility. Additionally, a portion of this budget will be utilized to reimburse fees associated with participating in joint domestic and international conferences. This strategic allocation ensures that we can leverage valuable experimental facilities and engage in scholarly exchanges to further advance our research objectives and disseminate our findings to a wider scientific community.

  • 研究成果

    (7件)

すべて 2024 2023 その他

すべて 国際共同研究 (1件) 雑誌論文 (1件) (うち国際共著 1件、 査読あり 1件) 学会発表 (5件) (うち国際学会 2件)

  • [国際共同研究] Oak Ridge National Laboratory(米国)

    • 国名
      米国
    • 外国機関名
      Oak Ridge National Laboratory
  • [雑誌論文] Multistep topological transitions among meron and skyrmion crystals in a centrosymmetric magnet2024

    • 著者名/発表者名
      Yoshimochi H.、Takagi R.、Ju J.、Khanh N. D.、Saito H.、Sagayama H.、Nakao H.、Itoh S.、Tokura Y.、Arima T.、Hayami S.、Nakajima T.、Seki S.
    • 雑誌名

      Nature Physics

      巻: Advance online publications ページ: 1-10

    • DOI

      10.1038/s41567-024-02445-9

    • 査読あり / 国際共著
  • [学会発表] Multi-step topological transitions among meron and skyrmion crystals in a centrosymmetric magnet2024

    • 著者名/発表者名
      H. Yoshimochi, R. Takagi, J. Ju, N. D. Khanh, H. Saito, H. Sagayama, H. Nakao, S. Itoh, Y. Tokura, T. Arima, S. Hayami, T. Nakajima, S. Seki
    • 学会等名
      CEMS symposium on emergent quantum materials 2024
    • 国際学会
  • [学会発表] Topological Nernst response in a chiral van der Waals antiferromagnet2024

    • 著者名/発表者名
      Nguyen Duy Khanh, Susumu Minami, Moritz M. Hirschmann, Ming-Chun Jiang, Rinsuke Yamada, Takuya Nomoto, Daiki Yamaguchi, Yoshihiro Okamura, Youtarou Takahashi, Shinichiro Seki, Yoshinori Tokura, Yasujiro Taguchi, Ryotaro Arita, Max Hirschberger
    • 学会等名
      CEMS symposium on emergent quantum materials 2024
    • 国際学会
  • [学会発表] 空間反転対称な正方晶スキルミオン物質GdRu2Ge2における磁気相図の磁場角度依存性2023

    • 著者名/発表者名
      吉持遥人, 高木里奈, Nguyen Duy Khanh, 速水賢, 関真一郎
    • 学会等名
      本物理学会2023年年次大会
  • [学会発表] 空間反転対称性な正方晶スキルミオンホストGdRu2(Si,Ge)2における新規相の発見と磁性の考察2023

    • 著者名/発表者名
      松山直史, 野村肇宏, 速水賢, 加藤康之, 吉持遥人, Nguyen Duy Khanh, 高木里奈, 十倉好紀, 関真一郎, 小濱芳允
    • 学会等名
      本物理学会2023年年次大会
  • [学会発表] Topological Nernst effect in a chiral van der Waals magnet2023

    • 著者名/発表者名
      Nguyen Duy Khanh, Susumu Minami, Rinsuke Yamada, Takuya Nomoto, Daiki Yamaguchi, Shinichiro Seki, Yoshinori Tokura, Yasujiro Taguchi, Ryotaro Arita, Max Hirschberger
    • 学会等名
      本物理学会2023年年次大会

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公開日: 2024-12-25  

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