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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 |
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| Cite this article: |
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SONG Yuan-Qiang, ZHANG Huai-Wu, WEN Qi-Ye et al 2008 Chin. Phys. Lett. 25 1106-1109 |
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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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| Keywords:
75.50.Pp
75.50.Dd
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Received: 27 December 2007
Published: 27 February 2008
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| PACS: |
75.50.Pp
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(Magnetic semiconductors)
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75.50.Dd
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(Nonmetallic ferromagnetic materials)
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