2013 Fiscal Year Final Research Report
Control of cation distribution in spinel type iron oxide particles
| Project/Area Number |
23360276
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Physical properties of metals
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| Research Institution | Tohoku University |
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Principal Investigator |
WASEDA Yoshio 東北大学, 多元物質科学研究所, 名誉教授 (00006058)
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| Co-Investigator(Kenkyū-buntansha) |
SUZUKI Shigeru 東北大学, 多元物質科学研究所, 教授 (40143028)
SHINODA Kozo 東北大学, 多元物質科学研究所, 准教授 (10311549)
FUJIEDA Shun 東北大学, 多元物質科学研究所, 助教 (60551893)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 金属物性 / 解析・評価 / 放射線、X線、粒子線 |
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| Research Abstract |
The porous particles of maghemite were prepared from iron phosphate particles by a novel method using alkaline solution, and then these were immersed in a solution containing Co. The Co adsorbed porous particles of maghemite showed superparamagnetic behavior. The superparamagnetic blocking temperature of these particles was increased by the annealing. In addition, the results of X-ray absorption spectroscopy measurements showed that the local structure around Co in the Co adsorbed porous particles after annealing is very similar to that of CoFe2O4. Consequently, Co in the Co adsorbed porous particles after annealing probably locates at the cation vacancy site of maghemite.
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