摘要
We establish a theoretical bimodal model for the complex permeability of flaky soft magnetic composite materials to explain the variability of their initial permeability.The new model is motivated by finding the two natural resonance peaks to be inconsistent with the combination of the domain wall resonance and the natural resonance.In the derivation of the model,two relationships are explored:the first one is the relationship between the number of magnetic domains and the permeability,and the second one is the relationship between the natural resonance and the domain wall resonance.This reveals that the ball milling causes the number of magnetic domains to increase and the maximum initial permeability to exist after 10 h of ball milling.An experiment is conducted to demonstrate the reliability of the proposed model.The experimental results are in good agreement with the theoretical calculations.This new model is of great significance for studying the mechanism and applications of the resonance loss for soft magnetic composite materials in high frequency fields.
作者
Xi Liu
Peng Wu
Peng Wang
Tao Wang
Liang Qiao
Fa-Shen Li
刘曦;吴鹏;王鹏;王涛;乔亮;李发伸(Key Laboratory of Opto-technology and Intelligent Control of Ministry of Education,Lanzhou Jiaotong University,Lanzhou 730000,China;Institute of Applied Magnetism,Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education,Lanzhou University,Lanzhou 730000,China)
基金
Project supported by the National Natural Science Foundation of China(Grant Nos.11564024,51731001,and 11574122)
the Fundamental Research Funds for the Central Universities,China(Grant No.lzujbky-2019-kb06).
