MICROMAGNETIC MODELING OF SPIN-VALVE TAPE HEADS

A micromagnetic model was developed for the study of large aspect rati o, shielded spin-valve tape devices. Magnetizations are defined at cel l vertexes, from which constant volume and surface charges are determi ned. Interlayer couplings are defined in terms of interfacial coupling constants, and Brown's equations with extended boundary conditions ar e solved for the ensemble of magnetizations. The dependence of MR outp ut on sensor height, bias current, and position within the gap are dis cussed. Magnetization profiles across head height for uniform and medi a field excitations are presented.