Effects of Ce3+ doping on the structure and magnetic properties of Mn-Zn ferrite fibers
来源期刊：Rare Metals2009年第2期
论文作者：XIANG Juna,SHEN Xiangqiana,and ZHU Yongweib a School of Materials Science and Engineering,Jiangsu University,Zhenjiang ,China b School of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing ,China
文章页码：151 - 155
摘 要：Ce3+-doped Mn-Zn ferrite fibers were successfully prepared by the organic gel-thermal decomposition method from metal salts and citric acid. The composition,structure,and magnetic properties of these ferrite fibers were characterized by X-ray diffraction （XRD）,scanning electron microscopy （SEM）,and vibrating sample magnetometer （VSM）. The results show that Mn0.2Zn0.8Fe2-xCexO4 （x = 0-0.04） fibers are featured with an average grain size of 11.6-12.7 nm,with diameters ranging between 1.0 to 3.5 μm and a high aspect ratio （length/diameter）. The Ce3+ ion doping has not resulted in crystal structural changes of the Mn-Zn ferrite phase and all the as-prepared ferrite fibers have a simple spinel phase structure,although this influences the morphologies of Mn0.2Zn0.8Fe2-xCexO4 ferrite fibers possibly owing to the lattice dis-tortion and internal-stress. Both the lattice constant and grain size increase slightly with the increase of the Ce3+ ion doping content. The soft magnetic properties of Mn-Zn ferrite fibers can be improved by a small amount of Ce3+ ion doping with an increase of the saturated magnetization and a decrease of the coercivity.
摘要：Ce3+-doped Mn-Zn ferrite fibers were successfully prepared by the organic gel-thermal decomposition method from metal salts and citric acid. The composition,structure,and magnetic properties of these ferrite fibers were characterized by X-ray diffraction （XRD）,scanning electron microscopy （SEM）,and vibrating sample magnetometer （VSM）. The results show that Mn0.2Zn0.8Fe2-xCexO4 （x = 0-0.04） fibers are featured with an average grain size of 11.6-12.7 nm,with diameters ranging between 1.0 to 3.5 μm and a high aspect ratio （length/diameter）. The Ce3+ ion doping has not resulted in crystal structural changes of the Mn-Zn ferrite phase and all the as-prepared ferrite fibers have a simple spinel phase structure,although this influences the morphologies of Mn0.2Zn0.8Fe2-xCexO4 ferrite fibers possibly owing to the lattice dis-tortion and internal-stress. Both the lattice constant and grain size increase slightly with the increase of the Ce3+ ion doping content. The soft magnetic properties of Mn-Zn ferrite fibers can be improved by a small amount of Ce3+ ion doping with an increase of the saturated magnetization and a decrease of the coercivity.
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