Magnetic losses in remanent state ferrites |
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| Authors: | JL Allen |
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| Institution: | Electrical Engineering Department Colorado State University, Fort Collins, Colorado USA |
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| Abstract: | Magnetic loss in remanent state ferrites1 has generally been described through the artifice of a magnetic loss tangent (tanδm = μ″?μ′). This characterization is not directly relatable to intrinsic material parameters. The results presented in this paper indicate that magnetic loss in the remanent state can be related to intrinsic material parameters by describing the ferrite mathematically by a complex “average” permeability tensor. The “average” permeability includes the effects of magnetocrystalline anistropy, remanent magnetization, linewidth and an average demagnetizing field appropriate to the distribution of magnetic domains. Experimental examples are given showing that excellent agreement is obtained between theoretically predicted and measured losses. |
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