Frequency-dependent effective permeability tensor of unsaturated polycrystalline ferrites

Pascal Thibaudeau (1) , Julien Tranchida (1)

1 CEA Le Ripault - CEA Le Ripault

Frequency-dependent permeability tensor for unsaturated polycrystalline ferrites is derived through an effective medium approximation that combines both domain-wall motion and rotation of domains in a single consistent scattering framework. Thus derived permeability tensor is averaged on a distribution function of the free energy that encodes paramagnetic states for anhysteretic loops. The initial permeability is computed, and frequency spectra are given by varying macroscopic remanent field.

Domaines: Matière Condensée [cond-mat]; Mécanique statistique [cond-mat.stat-mech]

Pascal Thibaudeau, Julien Tranchida. Frequency-dependent effective permeability tensor of unsaturated polycrystalline ferrites. Journal of Applied Physics, 2015, 118 (5), pp.053901. ⟨10.1063/1.4927724⟩. ⟨cea-01851359⟩