| Additional Y3+ Doping Effect on Ferromagnetism of Ce0.97Co0.03O2-δ Compounds |
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| 作者姓名： | 宋远强 张怀武 文岐业 朱豪 肖强 |
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| 作者单位： | [1]State Key Laboratory of Electronic Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054 [2]Department of Physics and Astronomy, University of Delaware, Newark, DE 19716, USA |
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| 基金项目： | Supported by the National Basic Research Programme of China under Grant No 2007CB31407, and the International S＆T Cooperation Programme of China under Grant No 2006DFA53410. |
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| 摘 要： | Y^3＋ doping effect on magnetic properties of Ce0.97Co0.03O2-δ are examined. Vibrating sample magnetometer （VSM） measurements indicate that Ce0.97Co0.03O2-δ is ferromagnetic at room temperature. The saturated magnetization Ms is altered by additional Y^3＋ doping, i.e., with the increase of the amount of Y^3＋ 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 Y^3＋ 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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| 关 键 词： | 铁磁性 Ce0.97Co0.03O2-δ 复合物 杂质 |
| 收稿时间： | 2007-12-27 |
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