Magnetization behaviors in a chain of disks

摘要

The magnetic behavior of a chain ofNdisks are investigated. The critical fieldHcrifor the discontinuous jump of the magnetization and the coercive forceHcfor the fanning mechanism, and the uniaxial magnetic anisotropy constantKuare estimated as a function ofN, the aspect ratio of the disks, and the magnetocrystalline anisotropy constantK1. By comparing theMHloops calculated and the experiments, the values ofK1andNare obtained for an assembly with random orientation of Ba ferrite particles. This value ofK1agrees well with the experimental results obtained by Fujiwara lsqb;IEEE Trans. Magn.MAGhyphen;23, 3125 (1987)rsqb;.