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3. Choice of core material and format to suit the application
When trying to use a metallic magnetic material (Fe, FeSi, FeNi alloys, amorphous or nanocrystalline) at high frequency, we are confronted with problems inherent in the low resistivities of these materials:
penetration depthδ: the useful electromagnetic wave is carried by only part of the material. This depth is proportional to the square root of the electrical resistivity ρ (Ω · m), and inversely proportional to the absolute permeability μ 0 μ' and the frequency (§ 8
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Choice of core material and format to suit the application
Manganese-zinc ferrites and their applications
Bibliography
Bibliography
Websites
Ferrites and Accessories|Products|TDK Product Center https://product.tdk.com/en/products/ferrite/index.html
Ferrites and Accessories (EPCOS)|TDK Electronics – TDK Europe https://www.tdk-electronics.tdk.com/en/ferrites
...Standards and norms
- Termes et nomenclature pour noyaux en matériaux ferrites magnétiquement doux - IEC 60401-1 - 2020
- Ferrite cores – Guidelines for the dimensions and limits of surface irregularities - IEC 63093-3 - 2020
- Ferrite cores – Standardized specific inductance for cores with air gap and associated tolerances - IEC 62358 - 2012
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