Development of angle-resolved resonant inelastic X-ray scattering and X-ray polarization precession spectroscopy for magnonic materials

• Project/Area Number: 18H03467
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 80040:Quantum beam science-related
• Research Institution: National Institutes for Quantum Science and Technology (2020-2021); The University of Tokyo (2018-2019)
• Principal Investigator: Miyawaki Jun 国立研究開発法人量子科学技術研究開発機構, 次世代放射光施設整備開発センター, 主任研究員 (70462736)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000); Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2019: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2018: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
• Keywords: 共鳴非弾性X線散乱 / 放射光 / 軟X線分光 / 偏光解析

Outline of Final Research Achievements

Magnons are collective excitations of electron spins and intensively investigated for magnonics application. High-energy and high-momentum magnons in the terahertz region are used for high-speed operation, and X-ray spectroscopy is a suitable technique to observe the terahertz magnons. We have developed a measurement system for angle-resolved resonant inelastic X-ray scattering and a new technique using the polarization of X-ray, X-ray polarization precession spectroscopy. We have demonstrated that X-ray polarization precession spectroscopy can observe magnons with high-energy resolution.

Academic Significance and Societal Importance of the Research Achievements

次世代の電子デバイスであるマグノニクスでは、電子のスピンが集団として示す性質であるスピン波（マグノン）を利用する。この高速な動作には従来よりも高エネルギーのマグノンの利用が考えられている。そこで、このような高エネルギーのマグノンの観測に適した手法が求められていた。本研究では、X線の偏光を利用するエネルギー分解能の高い新たな分光手法であるX線偏光歳差分光の開発を行い、高エネルギーのマグノンを観測する手法を実証したものであり、今後開発への利用が期待される。

Research Products

• [Journal Article] Fast and versatile polarization control of X-ray by segmented cross undulator at SPring-8 (2021)
  • Author(s): Jun Miyawaki, Susumu Yamamoto, Yasuyuki Hirata, Masafumi Horio, Yoshihisa Harada, Iwao Matsuda
  • Journal Title: AAPPS Bulletin Volume: 31 Issue: 1 Pages: 25-25
  • DOI: 10.1007/s43673-021-00026-z
  • Peer Reviewed / Open Access
• [Presentation] 超高分解能2D-RIXSで挑むサイエンス (2022)
  • Author(s): 宮脇 淳
  • Organizer: 第35回日本放射光学会年会・放射光科学合同シンポジウム
  • Invited
• [Presentation] Ultrahigh Energy Resolution RIXS Beamline at Next Generation 3 GeV Synchrotron Facility in Tohoku (2022)
  • Author(s): Jun Miyawaki, K. Fujii, T. Imazono, Y. Ohtsubo, T. Nakatani, A. Agui, H. Kimura, and M. Takahashi
  • Organizer: 14th International Conference on Synchrotron Radiation Instrumentation
  • Int'l Joint Research
• [Presentation] X線偏光歳差分光による高分解能スピン波検出II (2021)
  • Author(s): 宮脇淳、平田、靖透、山神、光平、松田、巌、原田慈久
  • Organizer: 日本物理学会第76回年次大会
• [Presentation] 超高分解能2D-共鳴非弾性軟X線散乱分光器の光学設計 (2021)
  • Author(s): 宮脇 淳
  • Organizer: 第34回日本放射光学会年会 放射光科学合同シンポジウム
• [Presentation] Ultrahigh Resolution hν2 RIXS Spectrometer at New 3 GeV Synchrotron Facility in Tohoku (2021)
  • Author(s): Jun Miyawaki
  • Organizer: Workshop on Resonant Inelastic and Elastic X-ray Scattering
  • Int'l Joint Research
• [Presentation] X線偏光歳差分光によるスピン波の観測 (2020)
  • Author(s): 宮脇淳、平田靖透、山神光平、松田巌、原田慈久
  • Organizer: 第33回日本放射光学会年会
• [Presentation] X線偏光歳差分光による高分解能スピン波検出 (2020)
  • Author(s): 宮脇淳、平田靖透、山神光平、松田巌、原田慈久
  • Organizer: 日本物理学会第75回年次大会
• [Presentation] Current Challenges and Future Perspectives of Resonant Inelastic Soft X-ray Scattering at SPring-8 and Next Generation Synchrotron Radiation (2019)
  • Author(s): Jun Miyawaki
  • Organizer: International Young Researchers Workshop on Synchrotron Radiation Science 2019
  • Int'l Joint Research / Invited
• [Presentation] High Performance Soft X-Ray RIXS and applications to Magnetic Materials (2019)
  • Author(s): Jun Miyawaki
  • Organizer: 11th International Conference on Inelastic X-ray Scattering
  • Int'l Joint Research / Invited
• [Presentation] 共鳴非弾性軟X線散乱による磁性研究と次世代放射光施設での展開 (2019)
  • Author(s): 宮脇 淳
  • Organizer: 日本放射光学会第11回若手研究会
  • Invited
• [Presentation] 超高分解能共鳴非弾性軟X線散乱で切り拓く磁性研究 (2019)
  • Author(s): 宮脇 淳
  • Organizer: 日本物理学会2019年秋季大会
  • Invited
• [Presentation] Design Concept of Single-meV Resolution Soft X-ray RIXS Spectrometer (2019)
  • Author(s): J. Miyawaki, K. Amemiya, and Y. Harada
  • Organizer: The 40th International Conference on Vacuum Ultraviolet and X-ray Physics
  • Int'l Joint Research
• [Presentation] 共鳴非弾性軟X線散乱装置による回折実験 (2019)
  • Author(s): 宮脇淳、小瀬川友香、山添康介、崔藝涛、Ralph Ugalino、原田慈久
  • Organizer: 日本放射光学会年会
• [Presentation] 回折実験のための共鳴非弾性軟X線散乱装置の開発 (2018)
  • Author(s): 宮脇淳、小瀬川友香、山添康介、崔藝涛、Ralph Ugalino、趙源衡、原田慈久
  • Organizer: 日本物理学会2018年秋季学会
• [Presentation] Dzyaloshinskii-Moriya Interaction in α‐Fe2O3 Measured by RIXS‐MCD and Upgrade of SPring‐8 BL07LSU (2018)
  • Author(s): Jun Miyawaki, Shigemasa Suga, Hidenori Fujiwara, Masto Urasaki, Hidekazu Ikeno, Hideharu Niwa, Hisao Kiuhi, Yuka Kosegawa, Kousuke Yamazoe, Yitao Cui, Yoshihisa Harada
  • Organizer: Workshop on Resonant Inelastic and Elastic X-ray Scattering 2018
  • Int'l Joint Research
• [Presentation] Magnetic Circular Dichroism in Resonant Inelastic Soft X-ray Scattering of α-Fe2O3 and Status of SPring-8 BL07LSU (2018)
  • Author(s): Jun Miyawaki, Shigemasa Suga, Hidenori Fujiwara, Masto Urasaki, Hidekazu Ikeno, Hideharu Niwa, Hisao Kiuhi, Yuka Kosegawa, Kousuke Yamazoe, Yitao Cui, Yoshihisa Harada
  • Organizer: International Conference on Electronic Spectroscopy and Structure
  • Int'l Joint Research