Observation of spin dynamics by time-resolved coherent soft x-ray diffraction imaging

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K23590
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0402:Nano/micro science, applied condensed matter physics, applied physics and engineering, and related fields
• Research Institution: Tohoku University (2020); High Energy Accelerator Research Organization (2019)
• Principal Investigator: Ishii Yuta 東北大学, 理学研究科, 助教 (40847232)
• Project Period (FY): 2019-08-30 – 2021-03-31
• Keywords: 時分解磁気イメージング

Outline of Final Research Achievements

We aimed to establish the way for time-resolved imaging measurement for magnetic texture. We assembled time-resolved imaging measurement system, where we utilize pulse x-ray and soft x-ray microscope to achieve pico-second time-scale imaging for spin current, in Synchrotron radiation facility Photon Factory. In the present study, we achieved 2-dim. static imaging for ferromagnetic maze domain pattern and time-resolved measurements for ferromagnetic resonant induced by microwave, although it remain as issue of time-resolved 2-dim. magnetic imaging.

Free Research Field

軟X線イメージング

Academic Significance and Societal Importance of the Research Achievements

本研究では、近年スピントロニクスデバイスへの応用が期待されているスピン流(スピン角運動量の伝播)の時分解磁気イメージング手法の確立を目指したものであり、その前段階である二次元イメージング手法の確立とピコ秒スケールの時分解測定に成功した。これらを組み合わせることで、高空間時間分解能を有する時分解磁気イメージングが可能となり、これまで明らかにされてこなかったスピン流等の磁気ダイナミクスの微視的機構の解明に繋がることが期待できる。