2013 Fiscal Year Final Research Report
Subnanoscale analysis of the ordering of strongly correlated electrons by very-low-temperature aberration-corrected STEM
| Project/Area Number |
23710115
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Nanostructural science
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
NAGAI Takuro 独立行政法人物質・材料研究機構, 電子顕微鏡ステーション, 主任エンジニア (90531567)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 強相関電子 / 磁気バブル / 軌道秩序 / ビスマス系高温超伝導体 / 透過型電顕 / 収差補正 |
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| Research Abstract |
We performed subnanoscale analysis of crystal structures of strongly correlated electron materials and the ordering of the electrons by transmission electron microscopy (TEM). We found formation of nanoscale magnetic bubbles in the orbital-ordered ferromagnetic insulating phase of perovskite-type manganite La1-xSrxMnO3 (x = 1/8) by Lorentz microscopy. In addition, the structures of grain boundaries and defects were revealed for Bi-based high-Tc superconductor (Bi,Pb)2Sr2Ca2Cu3O10+d (Bi-2223) by analysis of the atomic columns using low-voltage aberration-corrected scanning TEM.
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