2021 Fiscal Year Final Research Report
Analysis of spin and atomic arrangement of surfaces by electron spin-polarized ion scattering
Project/Area Number |
19K12633
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 80040:Quantum beam science-related
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Research Institution | National Institute for Materials Science |
Principal Investigator |
SUZUKI Taku 国立研究開発法人物質・材料研究機構, 機能性材料研究拠点, 主席研究員 (60354354)
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Project Period (FY) |
2019-04-01 – 2022-03-31
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Keywords | スピン / イオン散乱分光 / 最表面 |
Outline of Final Research Achievements |
Low-energy He+ ion scattering spectroscopy is useful for structural analysis of the topmost surface. The shadow cones play an essential role in structural analysis, and their precise determination is indispensable for accurate structural analysis. Recently, using the spin-polarized ion scattering spectroscopy (SP-ISS) developed by the present researcher, it has been clarified that the low-energy He+ ion scattering is affected not only by the central force based on the shielded Coulomb force but also by the non-central force based on the spin-orbit coupling (SOC). In this study, we clarified the relationship between this SOC and the shape of the shadow cone. We expanded the study to a combined spin and structure analysis using SP-ISS based on this knowledge.
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Free Research Field |
イオンビーム表面分析
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Academic Significance and Societal Importance of the Research Achievements |
表面の原子レベルでの構造解析は、基礎研究のみならず、薄膜や表面を利用する様々なデバイス開発でも重要である。低速イオン散乱分光法は、そのような表面構造解析のための手法の一つとして確立している。本研究では、その構造解析で用いるシャドーコーンとスピンとの関係について初めて解明した。そしてこの解明に用いたスピン偏極イオン散乱分光法を、Ge/Fe界面や、欠陥由来のZnO表面強磁性等の、スピンと構造の表面複合分析に適用した。
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