Micromagnetics and Signal Analysis of Shielded Spin-Valve Multilayer

In order to linearize a spin-valve giant magnetoresistance head, the exchanges layer sputtered at fringe area or a permanent magnet layer longitudinal biasing for domain stabilization based on a physical calculated model may be considered. The correlations between the head performance characteristic and head geometric parameters have been simulated by putting the head on a suitable front-end electric circuit. The simulative results show that the optimal sensing current is from 10 to 40mA and the linear geometric parameteres for gap width are at the range of G₁ + G₂ ≤ 0.5 μm.