Study of non local optical process in soft x-ray region
| Project/Area Number |
23540382
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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 |
Condensed matter physics I
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| Research Institution | Japan Atomic Energy Agency |
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Principal Investigator |
AGUI Akane 独立行政法人日本原子力研究開発機構, 原子力科学研究部門・量子ビーム応用研究センター, 研究主幹 (20360406)
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| Co-Investigator(Renkei-kenkyūsha) |
IKEDA Naoshi 岡山大学, 理学部, 教授 (00222894)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2013: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
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| Keywords | 光物性 / 非局所発光 / 光学過程 / モデル計算 / 軟エックス線発光 / 遷移金属酸化物 / マルチフェロイック / 放射光 / マルチフェロィック |
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| Research Abstract |
The crystal structure of LuFe2O4 has the alternate staking of triangular lattices of rare-earth elements, iron, and oxygen. The charge ordering of Fe2+ and Fe3+ ions in LuFe2O4 induces ferroelectricity below 330 K (Tco: charge order temperature). Above Tco, the three dimensional charge order changes into the two dimensional. In this study, the temperature dependence and polarization dependence of the X-ray emission spectra (XES) at Fe 2p-edge was investigated in order to study electric states in charge order state and charge disorder state. It was found that, in charge order state, Fe 2p edge -XES showed not only local optical process on each Fe2+ and Fe3+ site but also a non-local optical process between the Fe2+ and Fe3+ sites. It was found that the process was clear in plane direction. And more the non-local aspect was not clear in the charge disordered state.
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Report
(4 results)
Research Products
(37 results)
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[Presentation] Pb-Cr charge transfer in Pb1-xSrxCrO32013
Author(s)
Runze Yu, Kengo Oka, Hajime Hojo, Masaichiro Mizumaki, Akane Agui, Daisuke Mori, Yoshiyuki Inaguma, Masaki Azuma
Organizer
2013 MRS (Materials Research Society) fall meeting and exhibit
Place of Presentation
Boston, Massachusetts. USA
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