Microscopic studies of a SnO₂/α

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• 作者：Naoaki Hayashi ; Shigetoshi Muranaka ; Shinpei Yamamoto ; Mikio Takano ; Dong-Feng Zhang ; Ling-Dong Sun ; Chun-Hua Yan
• 关键词：Mö ; ssbauer spectroscopy ; SnO₂/α ; -Fe₂O₃ nanocomposite
• 刊名：Journal of Solid State Chemistry
• 出版年：2008
• 出版时间：December 2008
• 年：2008
• 卷：181
• 期：12
• 页码：3283-3286
• 全文大小：423 K

文摘

A SnO₂/α-Fe₂O₃ architectural nanocomposite, which was evidenced as SnO₂ nanorod arrays assembled on the surface of α-Fe₂O₃ nanotubes in our previous study, was investigated microscopically by means of Mössbauer spectroscopic and magnetic measurements. It was found for the SnO₂ nanorods that Fe³⁺ ions substituted slightly to Sn_0.998Fe_0.002O₂. Concerning the α-Fe₂O₃ tubes, the Morin transition, which was completely suppressed in the mother, SnO₂-free α-Fe₂O₃ nanotubes, was found to be recovered locally. We speculate that it takes place in the interface area as a result of structural modification needed for the connection with the SnO₂ nanorods.