Dilute Magnetism and Mossbauer Study of Nanoscaled SnO2 Co-Doped with Fe, Co, and Sb, Prepared by Sol-Gel Method

被引：3
|
作者：
Nomura, K. [1 ]
Shima, A. [1 ]
机构：
[1] Univ Tokyo, Sch Engn, Bunkyo Ku, Tokyo 1138656, Japan
来源：
MOSSBAUER SPECTROSCOPY IN MATERIALS SCIENCE - 2012 | 2012年 / 1489卷
关键词：
SnO2; Fe; Co and Sb doping; sol-gel method; thermal decomposition; dilute ferromagnetic oxide; Fe-57 Mossbauer spectroscopy; TEMPERATURE FERROMAGNETISM;
D O I：
10.1063/1.4759468
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
SnO2-based oxides doped with Fe-57, prepared by a sol-gel method, are reviewed, and Sb doping effect on (Fe, Co)-doped SnO2 and Fe doping effect on (Sb, Co)-doped SnO2 were investigated. The crystalline grains of SnO2 were grown and the magnetic properties were improved in the doping range of 3-5 at.% of Sb. It was found that the intensity of magnetic broad sextet in Mossbauer spectra correlates with the saturation magnetization for 3 at.% Sb-, 1 at.% Co- and several at.% Fe-doped SnO2. When the doping exceeds 3 at.% of Fe, hematite (alpha-Fe2O3) clusters were produced in addition to maghemite (gamma-Fe2O3)-like clusters or defects inducing ferromagnetism. The origins of the dilute ferromagnetism are discussed.
引用
收藏
页码：13 / 20
页数：8
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