Additional Y3+ doping effect on ferromagnetism of Ce0.97Co0.03O2-delta compounds

作者：Song Yuan Qiang^*; Zhang Huai Wu; Wen Qi Ye; Zhu Hao; Xiao, John Q

来源：Chinese Physics Letters, 2008, 25(3): 1106-1109.

Y3+ doping effect on magnetic properties of Ce0.97CO0.03O2-delta are examined. Vibrating sample magnetometer (VSM) measurements indicate that Ce0.97Co0.03O2-delta is ferromagnetic at room temperature. The saturated magnetization MS is altered by additional Y3+ cloping, i.e., with the increase of the amount of Y3+ doping concentration in Ce0.97-yYyCo0.03O2-delta (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+ cloping 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.

• 出版日期2008-3
• 单位电子科技大学