Resolve magnetic permeability modes of RF absorbers made from NiCoZn spinel ferrite assisted by FORC measurements

IF 4.6 2区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Chinese Journal of Physics Pub Date : 2025-02-01 DOI:10.1016/j.cjph.2024.12.008

Man-Gui Han, Kai-Xiang Kuang

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Abstract

The features of inhomogeneous microstructures were revealed by the particle size distributions analysis and first order reversal curves (FORC) measurements, the permeability dispersion spectra of (Ni_0.4Zn_0.59Co_0.01)Fe₂O₄ spinel ferrites had been well resolved with four modes of magnetic losses. The fitting results showed that two relaxation modes made major contributions to the permeability dispersion. The permittivity dispersion behaviors were well fitted based on the Cole - Cole law, which assumed the existence of the distribution of relaxation time. The circular arc diagram of ε′- ε″ also justified the application of Cole-Cole permittivity law in NiCoZn ferrite. The relaxation time of polarization with the highest probability was about 4.314 × 10^-7 seconds. The results also showed that NiCoZn ferrites had a good radio frequency (RF) absorbing capability within 45 MHz – 400 MHz, which was well explained based on the contour map of impedance match coefficients.

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来源期刊

Chinese Journal of Physics 物理-物理：综合

CiteScore

8.50

自引率

10.00%

发文量

361

审稿时长

44 days

期刊介绍： The Chinese Journal of Physics publishes important advances in various branches in physics, including statistical and biophysical physics, condensed matter physics, atomic/molecular physics, optics, particle physics and nuclear physics. The editors welcome manuscripts on: -General Physics: Statistical and Quantum Mechanics, etc.- Gravitation and Astrophysics- Elementary Particles and Fields- Nuclear Physics- Atomic, Molecular, and Optical Physics- Quantum Information and Quantum Computation- Fluid Dynamics, Nonlinear Dynamics, Chaos, and Complex Networks- Plasma and Beam Physics- Condensed Matter: Structure, etc.- Condensed Matter: Electronic Properties, etc.- Polymer, Soft Matter, Biological, and Interdisciplinary Physics. CJP publishes regular research papers, feature articles and review papers.