Co^(2+)取代对Ni铁氧体材料微波特性的影响  

Effects of Co^(2+) substitution on the microwave properties of Ni ferrites

作　　者：冯涛[1] 袁红兰[1] 

机构地区：[1]西南应用磁学研究所,四川绵阳621000

出　　处：《磁性材料及器件》2016年第1期54-56,共3页Journal of Magnetic Materials and Devices

摘　　要：采用陶瓷工艺制备了Ni_(1-z)Co_z Fe_2O_4(0≤z≤0.04)微波铁氧体材料,研究了快弛豫离子Co^(2+)取代对Ni铁氧体材料微波性能的影响。结果表明,加入微量取代离子Co^(2+),随取代量的增大铁氧体材料的自旋波线宽ΔHk呈线性增大;材料的铁磁共振线宽ΔH先降后升,在Co含量为z=0.02时,材料ΔH出现最小值;Co^(2+)取代对材料的饱和磁化强度M_s、介电损耗的影响不大。Ni（1-z）Coz Fe2O4（0≤z≤0.04）ferrite material was prepared by ceramic process. Effect of the substitution of fast relaxation ion Co^2＋ on the microwave properties of Ni-ferrite Materials was investigated. The experimental results show that with the increase of trace Co^2＋ substitution spinwave linewidth ΔHk increases and the ferromagnetic resonance linewidth ΔH decreases first and then increases, with minimal ΔH at Co^2＋ substitution of z=0.02. However, Co^2＋ substitution almost does not affect the saturation magnetization Ms and dielectric loss tanδε.

关 键 词：Ni铁氧体 Co2+取代 自旋波线宽ΔHk 铁磁共振线宽ΔH 饱和磁化强度Ms 介电损耗角正切tanδε 

分 类 号：TM277.1[一般工业技术—材料科学与工程]