| Project/Area Number |
24360007
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Applied materials science/Crystal engineering
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
SASAKI Satoshi 東京工業大学, 応用セラミックス研究所, 教授 (10162364)
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| Co-Investigator(Kenkyū-buntansha) |
OKUBE Maki 東京工業大学, 応用セラミックス研究所, 助教 (10397060)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2014: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2013: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2012: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
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| Keywords | Ｘ線共鳴磁気散乱 / マグネタイト / 放物面多層膜ミラー / 磁性電子密度 / 不対電子軌道 / フェリ磁性 / 超交換相互作用 / 放射光Ｘ線 / Ｘ線ミラー / 移相子 / 円偏光Ｘ線 / ４軸回折計 / 不対電子密度 / X線共鳴磁気散乱 / X線ミラー / 円偏光X線 / 4軸回折計 / 放射光X線 |
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| Outline of Final Research Achievements |
The X-ray mirror system was installed in the BL-6C experimental hatch of the Photon Factory, KEK, where various experiments on the resonant X-ray magnetic scattering (RXMS) become possible to study magnetic electrons with the focused X rays. A parabolic multilayer mirror was placed between the phase retarder and a high-precision AFC-5u four-circle diffractometer.
The weak RXMS signal of magnetite, Fe3O4, was measured at Fe K absorption edge. It becomes clear that ferrimagnetic magnetite has the energy dependency in resonant magnetic scattering factors, suggesting the existence of specific electron orbits for A and B crystallographic sites. Super exchange interaction possibly exists between a transition-metal atom and oxygen and more distant atoms. The Fourier analyses using the RXMS data give the magnetic electron-density distribution and the information on such hybrid orbits related to the electronic transition of Fe atoms.
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