Open AccessPhotoluminescence and magnetic properties of cobalt doped SnO2 nano-powder
Author(s) -
Chunming Liu,
Fang Li-Mei,
Xihong Zu
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.936
Subject(s) - photoluminescence , dopant , materials science , ferromagnetism , cobalt , doping , condensed matter physics , optoelectronics , metallurgy , physics
The influence of cobalt dopant on the photoluminescence and magnetic properties of SnO2 nano-powder is studied in detail. The cobalt dopant has little influence on the photoluminescence peaks' positions. Howeverthe intensity ratio of ultra-violet to blue emission band is reduced with the increase of cobalt doping. The ferromagnetism is absolutely absent when the cobalt dopant level reaches 0.02. The magnetic interaction mechanism is discussed. Due to the non-uniform distribution of dopingand the coupling between the polarized spin on defects and the dopantsthe anti-ferromagnetic interaction destroys the ferromagnetism.