Based on the physics computation model in this work,we firstly calculated the signal field and magnetization distribution in free layer using transmittance line model and micro-magnetic theory,and then we discussed the effect of size and magnetic parameters on the magnetic flux and signal field;finally,we put the head on a suitable front-end electric circuit which acts as a vari.

The nano-granular magnetic films were investigated using the micromagnetics method in this paper.

The strengths of the inter grain exchange interaction were evaluated for nanocrystalline Nd 2 33 Fe 14 B 1 06 Si 0 21 magnets by comparing the i H c calculated by finite element technique of micromagnetics with the experiments With increase of the grain diameter from 0 to 12 4,37 2 and 49 6nm,the interaction in reference to that without the grain boundary phase decreases to～0 80,～0 50,and ～0 4

A micromagnetic simulation is presented for the read and write process of computer hard disks.

The micromagnetic simulation is in accordance with experiment results.

The relation between the remanence and the intrinsic coercive field of periodic and quasi-periodic configuration Sm-Co/α-Fe multilayers and thickness and layer-number of the system are investigated by using the micromagnetic theory.

This paper is based on the micromagnetic theory to study the magnetization reversal mechanism of exchange-coupled hard /soft magnetic bilayer by using three-dimension dynamic model.

To forecast the magnetism of hard/soft exchange-coupling bilayers, the relation between the intrinsic coercive field of the bilayers and the angle between orientation of magnetic field and easy axes of hard layer was investigated by using three-dimension dynamic model based on micromagnetic theory.