複合微粒子集合体の初透磁率(Selected Papers from the Fourth International Workshop on High Frequency Micromagnetic Devices and Materials(MMDM4))

概要

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The initial permeability of a composite assembly consisting of Fe and Fe_3O_4 particles whose average diameters were 1μm and 10nm, respectively, was investigated. It was found that the initial permeability is sensitively dependent on the volume ratio of Fe and Fe_3O_4. The effect is due to a specific structure of the composite assembly whereby Fe_3O_4 particles congregate in air gaps created by Fe particles, reducing the demagnetizing field of Fe particles. This result suggests that ferromagnetic particle assembly consisting of particles with large size difference may be a good high-frequency core material.
社団法人日本磁気学会の論文
2006-11-01