Complex Permeability Spectra of Co-Substituted Lithium Zinc Perminvar Ferrite
The effect of Co-substitution on the complex permeability of LiZn ferrite was studied.The polycrystalline ferrite samples with a composition of ((Li0.5Fe0.5)0.8Zn0.2)1-xCoxFe2.05O4,where x varies from 0 to 0.08,were prepared by solid-reaction method.The sintered samples were annealed at 490℃ for 96 h to produce perminvar effect.The complex permeability was measured in the frequency range from 1 MHz to 2 GHz.The Co-substitution can enhance the real part of complex permeability (μ).The maximum μ appears when x=0.02.The Co-substituted LiZn samples,especially for x=0.02 and 0.04,present resonance-type magnetic spectra obviously.The μ of the sample for x=0.02 increases because the damping of domain wall movement decreases after the annealing treatment.The resonance character of the annealed sample becomes even more remarkable due to its domain wall stabilization.
Complex permeability Ferrite Perminvar
Hongjie Zhao Ji Zhou Longtu Li
Department of Materials Science and Engineering,State Key Laboratory of New Ceramics and Fine Processing,Tsinghua University,Beijing 100084,Peoples Republic of China
国际会议
The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))
长沙
英文
591-593
2007-05-10（万方平台首次上网日期，不代表论文的发表时间）