Sensor structure having layer with high magnetic moment

摘要

A reader sensor having a composite shield and a sensor stack. The composite shield includes a high magnetic moment layer having a magnetic moment greater than 1.0 T, a low magnetic moment layer, and a spacer therebetween. The high magnetic moment layer is closer to the stack than the low magnetic moment layer. The high magnetic moment layer may be a single layer or have a plurality of layers.

主权项

1. A reader sensor comprising:
a sensor stack; and a composite shield including:
a reference layer having a magnetic moment greater than 1.0 T, the reference layer comprising a first magnetic material having a magnetic moment greater than 1.0 T and a second magnetic material having a magnetic moment of 1.0 T or less,a pinned layer having a magnetic moment no greater 1.0 T, anda spacer between the reference layer and the pinned layer, wherein the reference layer is in contact with and adjacent to the sensor stack.