Calculation of High Frequency Complex Permeability of Carbonyl Iron Flakes in a Nomagnetic Matrix

• 来源期刊: 中国物理快报(英文版)
• 年，卷（期）: 2008,（2）
• 页码范围: 751-754
• 页数: 4页
• 语种: 英文

摘要

The carbonyl iron flakes are fabricated by high-energy ball milling.The effective permeability is measured and calculated for the composite consisting of flakes embedded in a nonmagnetic matrix.The magnetic flakes with a shape anisotropy and random spatial distribution of normal direction are considered to calculate the complex permeability of magnetic flake materials.Its analytical model is derived from the Landau-Lifshitz- Gilbert equation and Bruggeman's effective medium theory.The calculated results agree well with the experiment.