着磁可能Sm_2Fe_<17>N_3磁石多磁区粒子における着磁および核生成挙動の解析

概要

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Sm_2Fe_<17>N_3 powders used in permanent magnets are composed of three types of particle: (1) single-domain particles (SDPs), (2) multi-domain particles (MDPs) in which the domain walls move under a relation of H_<appl>=NM, where N is a demagnetizing factor, M is the magnetization in a particle and H_<appl> is an applied magnetic field, and (3) Particles that behave as MDPs in a demagnetized state, but can be magnetized to become SDPs under a certain magnetic field and behave as SDPs unless renucleation occurs. The authors studied the magnetization and nucleation behavior of the last type of particles, which they call saturable multi-domain particles(SMDPs). In this report, the relation between magnetization and nucleation fields in SMDPs is measured for isolated and isotropically distributed Sm_2Fe_<17>N_3 particles.
社団法人日本磁気学会の論文
1998-04-15