Structure and magnetic properties of Ni Cu Zn ferrite materials with La doping

• Published in: 稀有金属：英文版 no. 3; pp. 202 - 204
• Main Author: Yuan-Xun Li Jie Li Qiang Li Guo-Liang Yu Huai-Wu Zhang
• Format: Journal Article
• Language: English
• Published: 2017
• ISSN: 1001-0521; 1867-7185

Ni0.3Cu0.07Zn0.63Fe2-xLaxO4 ferrites were prepared by solid phase method and sintered at 1,150 ℃ for6 h.The phase formation,micro structure,and magnetic properties of samples were investigated.With doping of La3+,the samples contain two phases:LaFeO3 and NiCuZn ferrites.Scanning electron microscope（SEM） image shows that La doping constrains the growth of NiCuZn ferrite,which is more uniform.La doping improves magnetic properties of NiCuZn ferrite when x=0.03.The saturation magnetization（Ms） increases first;when x=0.03,the highest value is 75.35 A·m2·kg-1.The permeability increases to the maximum value with frequency and then decreases with the concentration of La3+ increasing.When x=0.03,the maximum value of real permeability at 1 MHz is 333.5,and the loss angle tangent（tanδ） is not more than 0.02.La doping improves the properties of NiCuZn ferrite,which can be applied to low-frequency filters.