All-metallic giant magnetoresistive (GMR) sensors in a current-perpendicular-to-plane (CPP) geometry are attractive candidates for future high-density recording sensors due to their low intrinsic resistance. With increasing recording density the cross-sectional area of CPP sensors (such as TMR or GMR sensors) must also decrease, resulting in a rapid increase in sensor impedance unless the RA product of the sensor stack also decreases. Thus, as recording densities increase above 300Gb/in{sup}2, and sensor sizes decrease below 50nm, low-resistance CPP-GMR sensors become of greater interest to minimize impedance, reduce noise and improve the bandwidth characteristics of the read head. Here we present results on the magnetotransport properties, fabrication, and performance of all-metal CPP-GMR shielded read heads with ultra-narrow physical widths between 40 and 60nm.
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机译：电流垂直到平面（CPP）几何中的全金属巨大磁阻（GMR）传感器是由于它们的内在电阻低，为未来的高密度记录传感器是有吸引力的候选者。随着记录密度的增加，CPP传感器的横截面积（例如TMR或GMR传感器）也必须降低，导致传感器阻抗的快速增加，除非传感器堆栈的RA产品也降低。因此，由于记录密度增加300GB / In {Sup} 2，并且传感器尺寸降低50nm，低电阻CPP-GMR传感器变得更加兴趣，以最小化阻抗，降低噪声并改善读头的带宽特性。在这里，我们对所有金属CPP-GMR屏蔽读头的磁传输性能，制造和性能的结果具有40至60nm之间的超窄物理宽度。
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