What is real and imaginary permeability in electromagnetics?
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Real and imaginary permeability are crucial parameters in electromagnetics. The real part of permeability represents the material's ability to store magnetic energy, while the imaginary part signifies the energy dissipation as heat. In the context of high-frequency magnetic materials, the real and imaginary permeability play a significant role in determining core loss characteristics and component sizing. Contrary to some conclusions, it is established that for linear, passive dielectric-magnetic materials, both the real and imaginary parts of permeability are always positive. Studies on ferrites have shown that the real part of permeability is frequency and field-dependent, while substitutions in crystal structures can modify the permeability spectrum predictably. Additionally, the frequency dependence of complex permeability in ferrites can be approximated by a first-order linear differential equation, providing insights into the behavior of these materials at different frequencies.
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6 Citations | Real permeability remains constant with frequency, while imaginary permeability is proportional to frequency in ferrites. They are key factors in understanding frequency-dependent magnetic properties in electromagnetics. |
| In electromagnetics, the real permeability represents the material's magnetic properties, while the imaginary permeability indicates energy dissipation, always being positive according to Poynting theorem constraints. | |
5 Citations | Real permeability represents the material's ability to store magnetic energy, while imaginary permeability indicates energy dissipation. Both are crucial in understanding electromagnetic behavior in materials like ferrites. |
3 Citations | Real permeability represents the material's magnetic properties affecting inductance, while imaginary permeability relates to energy losses due to magnetic field variations in electromagnetic components. |
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