2013 Fiscal Year Final Research Report
Development of x-ray standing waves for visualizing an atomic-scale interface of electronic materials and devices
| Project/Area Number |
23600018
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Quantum beam science
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
SAKATA Osami 独立行政法人物質・材料研究機構, 高輝度放射光ステーション, ステーション長 (40215629)
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| Co-Investigator(Renkei-kenkyūsha) |
NAKAMURA Masashi 千葉大学, 大学院工学研究科, 助教 (70348811)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 硬X線定在波 / 界面原子配列構造 / シンクロトロンX線回折 / 動力学的X線回折 / 高平行Ｘ線 / マイクロメータX線ビーム / 非破壊構アトミックスケール造解析 |
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| Research Abstract |
We developed an x-ray optics including one or two Si (004) channel-cut crystals, a feedback-control system for stabilizing an arc-sec angular divergence, refractive micrometer lenses, and limiting slits. A vertical angular divergence of 1.3 arc sec and a horizontal beam size of about 2 um were evaluated for 12.4 keV incident x-ray photons.
We investigated a gold single crystal surface in H2SO4 solution and a thin film and nanowires epitaxially grown on a sapphire single crystal. Rocking curves of diffraction intensities and emission profiles were observed. The curves look like dynamical x-ray diffraction ones for an almost perfect crystal. Dynamical x-ray diffraction phenomena took place in the gold and sapphire substrate, which was quite surprising and unexpected.
Our research outcomes indicate that one will apply the standing wave technique to a structural analysis for a surface system and buried interface of thin film on a non perfect crystal like a metal and oxide material.
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