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优化材料性能参数和自旋阀巨磁电阻磁头的结构参数是微磁器件实用化的关键。基于建立的物理计算模型，首先将自旋阀巨磁电阻磁头传感单元作为有源磁电阻放入前端放大电路，对输出电压、二次谐波及线性区间进行态模拟发现在缝宽ｇ１ ＋ ｇ２ ≤０．７μｍ ，线性偏电流１０～５０ｍ Ａ 范围内，自旋阀磁头相对记录介质有线性信号输出
The optimization of the material performance parameters and the structural parameters of the giant magnetoresistance heads of the spin valve are the key to the practical application of micromagnetic devices. Based on the established physical calculation model, the sensor unit of the giant magnetoresistive head of the spin valve is put into the front-end amplifier circuit as the active magnetoresistive and the output voltage, the second harmonic and the linear interval are modeled. It is found that in the slot width g1 + g2 ≤ 0.7μm, linear bias current 10 ~ 50m A range, the spin valve head relative to the recording medium has a linear signal output