抄録
The magnetization distribution for GMR heads with non-coupled NiFe/Cu/Co/Cu GMR elements was simulated by magnetic calculation. The output waveform for yoke type heads is more symmetric than that for shield type heads, because, in the yoke type head case, the flux from the medium flows out of the GMR element edge, where the static magnetic coupling between the NiFe and the Co layers exists. The sense current directions in yoke type heads have much influence on the output level, as well as the output waveform asymmetry. The current direction specification raises the output level about 30%. Consequently, it is proved that the yoke type GMR heads have an output level over 950 μ V/ μ m and a symmetric output waveform, according to the parameters optimization.
