SENSOR STABILIZATION IN A MULTIPLE SENSOR MAGNETIC REPRODUCING DEVICE

摘要

A multi-sensor reader that includes a first sensor that has a sensing layer with a magnetization that changes according to an external magnetic field. The first sensor also includes first and second side biasing magnets having a magnetization substantially along a first direction. The first and second side biasing magnets align the magnetization of the sensing layer substantially along the first direction when the sensing layer is not substantially influenced by the external magnetic field. The multi-sensor reader further includes a second sensor that is stacked over the first sensor. The second sensor includes a reference layer that has a magnetization that is set substantially along a second direction. The first sensor further includes at least one sensor-stabilization feature that counteracts an influence of a magnetic field utilized to set the magnetization of the reference layer of the second sensor in the second direction on the magnetization of at least one of the first and second side biasing magnets in the first direction.

主权项

1. A multi-sensor reader comprising:
a first sensor comprising:
a sensing layer having a magnetization that changes according to an external magnetic field; andfirst and second side biasing magnets having a magnetization substantially along a first direction, wherein the first and second side biasing magnets are configured to align the magnetization of the sensing layer substantially along the first direction when the sensing layer is not substantially influenced by the external magnetic field; and a second sensor stacked over the first sensor, the second sensor comprising a reference layer having a magnetization set substantially along a second direction, wherein the first sensor comprises at least one sensor-stabilization feature configured to counteract an influence of a magnetic field utilized to set the magnetization of the reference layer of the second sensor in the second direction on the magnetization of at least one of the first or second side biasing magnets in the first direction.