Additional Y3+ Doping Effect on Ferromagnetism of Ce0.97Co0.03O2-δ Compounds
SONG Yuan-Qiang1, ZHANG Huai-Wu1, WEN Qi-Ye1, ZHU Hao2, John Q. Xiao2
1State Key Laboratory of Electronic Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 6100542Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
Additional Y3+ Doping Effect on Ferromagnetism of Ce0.97Co0.03O2-δ Compounds
SONG Yuan-Qiang1;ZHANG Huai-Wu1;WEN Qi-Ye1;ZHU Hao2;John Q. Xiao2
1State Key Laboratory of Electronic Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 6100542Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA
摘要Y3+ doping effect on magnetic roperties of Ce0.97Co0.03O2-δ are examined. Vibrating sample magnetometer (VSM) measurements indicate that e0.97Co0.03O2-δ is ferromagnetic at room temperature. The saturated magnetization MS is altered by additional Y3+ doping, i.e., with the increase of the amount of Y3+ doping concentration in Ce0.97-yYyCo0.03O2-δ (y=0.01, 0.05 and 0.10), MS increases persistently. Raman spectra measurements indicate that additional oxygen vacancies are introduced with the amount of Y3+ doping content. The results can be well elucidated by the F-centre exchange coupling (FCE) mechanism proposed recently, thus they are important for understanding the ferromagnetism origination in transitional metal-doped insulating oxides.
Abstract：Y3+ doping effect on magnetic roperties of Ce0.97Co0.03O2-δ are examined. Vibrating sample magnetometer (VSM) measurements indicate that e0.97Co0.03O2-δ is ferromagnetic at room temperature. The saturated magnetization MS is altered by additional Y3+ doping, i.e., with the increase of the amount of Y3+ doping concentration in Ce0.97-yYyCo0.03O2-δ (y=0.01, 0.05 and 0.10), MS increases persistently. Raman spectra measurements indicate that additional oxygen vacancies are introduced with the amount of Y3+ doping content. The results can be well elucidated by the F-centre exchange coupling (FCE) mechanism proposed recently, thus they are important for understanding the ferromagnetism origination in transitional metal-doped insulating oxides.
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2008, Vol. 25 
