Simple analytical expressions for the longitudinal surface fields from four types of shielded magnetoresistive (MR) heads, i.e., single element MR heads (both centered and off-center), dual-stripe heads, and "differential" MR heads are derived using superposition and Schwarz-Christoffel transformation. These expressions are utilized to study playback pulse shape and spectra. For the centered shielded MR head as well as the dual stripe shielded MR head, simple accurate formulas for PW/sub 50/ and D/sub 50/ are derived. For the dual stripe MR head, the model predicts the position of the first spectral gap null accurately, as well as the voltage spectral shape.
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机译：四种类型的屏蔽磁阻（MR）磁头，即单元素MR磁头（居中和偏心），双条纹磁头和“微分” MR磁头的纵向表面场的简单解析表达式都可以通过叠加和推导得出。 Schwarz-Christoffel转换。这些表达式用于研究回放脉冲的形状和频谱。对于居中的屏蔽MR头以及双条纹屏蔽MR头，得出了PW / sub 50 /和D / sub 50 /的简单精确公式。对于双条纹MR磁头，该模型可准确预测第一个光谱间隙为零的位置以及电压光谱形状。
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