抄録
We have investigated eight-layered and twelve-layered composite anisotropic films to obtain advanced properties for practical use and to understand the relation of the magnetic layers. A calculation of permeability based on the Landau-Lifshitz relation predicts that the dipole-dipole coupling between the magnetic layers works in favor of Ku (in-plane uniaxial anisotropy) in each magnetic layer. When a gap between magnetic layers is varied by the ceramic layer, the dipole moment of metal layers is influenced by the magnetic interaction of a ripple stray field in a direction of 45° diagonally across intervening ceramic layers. In order to clarify the mechanism governing the isotropic permeabilities of these multilayers, we extended our study from diskshaped samples to ring-shaped ones. In comparison with a uniaxial multilayered film, a ring-shaped composite anisotropy multilayered film has a closed magnetic circuit and a resultant large inductance. Composite anisotropy effects are discussed in this paper.
