Magnetization Enhancement in Room-Temperature Ferromagnetic Fe--Mn Co-Doped SnO2
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概要
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Dilutely Fe--Mn co-doped SnO2 was synthesized by a sol--gel method. The co-doping effect enhances the magnetization in comparison with the case of single-ion doping. We found that saturation magnetization values are correlated with the crystalline sizes. Mössbauer spectrometry revealed the magnetic sextet and relaxation peaks, which suggest that Fe ions contribute to the magnetic ordering and superparamagnetic properties. X-ray absorption spectroscopy revealed that Mn3+ states mixed with Mn2+ states are dominant in Fe--Mn co-doped SnO2.
- 2012-02-25
著者
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Yamada Yasuhiro
Department Of Agricultural Chemistry Faculty Of Agriculture University Of Tokyo
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Nomura Kiyoshi
Department of Applied Chemistry, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
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Okabayashi Jun
Research Center for Spectrochemistry, The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
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Kono Shin
Department of Chemistry, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
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