Hybrid transmission line-micromagnetic model for MR heads

A hybrid transmission line-micromagnetic model for a shielded MR read head is described. In this model, the magnetostatic potentials and magnetization orientation angles in the magnetic films of a sensor stack satisfy the tra nsmission line and micromagnetic equations. This coupled system of partial differential equations is solved by a finite difference method with nonunif orm mesh. The magnetic flux entering the sensor from the media or permanent magnets are calculated by reciprocity. The hybrid model is found to agree closely with a conventional micromagnetic model for magnetization distribut ions in the sensor. (C) 2000 American Institute of Physics. [S0021- 8979(00 )58808-2].