Generalized Permeability Tensor Model: Application to Barium Hexaferrite in a Remanent State for Self-Biased Circulators

  title={Generalized Permeability Tensor Model: Application to Barium Hexaferrite in a Remanent State for Self-Biased Circulators},
  author={Ph. Gelin and Patrick Qu{\'e}ff{\'e}lec},
  journal={IEEE Transactions on Magnetics},
We describe a theoretical approach for determining the permeability tensor of polycrystalline ferrites regardless of their magnetization state. To take into account both the demagnetizing dynamic fields related to the magnetic domain and grain shapes and the magnetic interactions between adjoining domains and between adjoining grains, we transform the classical Landau-Lifschitz-Gilbert equation into a coupled two-equation system. We introduce statistical distribution laws for both the domain… CONTINUE READING
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