A Comparative Study of the Magnetoresistive Heads

黃暉理(Huei-Li Huang)；洪靜雅(Chin-Ya Hung)

Chinese Journal of Physics

22卷2期（1984 / 07 / 01）

55 - 69

英文

We carry out the readout signal calculation for shielded single-stripe magnetoresistive element (MRE) and unshielded dual-stripe and three-stripe MREs under various biasing conditions. Our studies point out that the voltage signal from the shielded MRE increases linearly with the gap width, becomes slower at g - 1 μm then saturated as g gets larger. A three-stripe MRE under substractive biasing condition will result in a sharped signal distribution which materially improves the signal resolution while at the same time maintaining at a high signal level as compared to that from a shieldedMRE. For example, at the stripe-medium separation of d=0.35pm, the signal from the three-stripe MRE is at least an order of magnitude greater than that from the shielded MRE.