In this paper, an analytical model has been established to calculate the driving efficiency, /spl xi/, which is defined as the ratio of the current-induced field at the center of the free layer in the GMR sensor to the currents in the conductors. Expressions for the driving efficiencies /spl xi/ of the bias conductor and the sense conductor inside the yoke GMR test structures are derived. The trends of the driving efficiency as a function of several head parameters are obtained. The simulation results indicate that the driving efficiency of the sense current is about an order of magnitude less than that of the bias conductor and that the product of the GMR sensor permeability and its thickness plays an important role in determining the driving efficiency. Output signal of a yoke GMR sensor calculated from this model is in good agreement with the experimental result.
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机译：在本文中，已经建立了一个分析模型来计算驱动效率/ spl xi /，其定义为GMR传感器自由层中心处的电流感应场与导体中电流的比值。推导了磁轭GMR测试结构内部偏置导体和感测导体的驱动效率/ spl xi /的表达式。获得了驱动效率随多个头部参数变化的趋势。仿真结果表明，感测电流的驱动效率比偏置导体的驱动效率小大约一个数量级，并且GMR传感器磁导率及其厚度的乘积在确定驱动效率中起着重要作用。由该模型计算出的磁轭GMR传感器的输出信号与实验结果吻合良好。
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