Non-local spin valve sensor for high linear density
AssigneeSeagate Technology LLC
InventorMark Thomas Kief
Life of this patent
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Abstract
A non-local spin valve (NLSV) sensor includes a bearing surface and a detector located proximate to the bearing surface. The NLSV sensor also includes a channel layer located behind the detector relative to the bearing surface, and in a substantially same plane as the detector. The channel layer has a front end that is proximate to the detector and a rear end that is distal to the detector. The NLSV sensor further includes first and second spin injectors, with the first spin injector located proximate to the rear end of the channel layer and positioned above the channel layer, and the second spin injector located proximate the rear end of the channel layer and positioned below the channel layer.
Claims9
A method comprising:
- selecting first design parameter values for a spin injector and for a first interface resistance between the spin injector and a channel layer;
- selecting second design parameter values for a detector and for a second interface resistance between the detector and the channel layer;
- selecting third design parameter values for the channel layer such that the third design parameter values comport with the first design parameter values and the second design parameter values, the selection of the third design parameter values comprising:
- measuring different detector-channel voltage values for different thickness values for the channel layer between a predetermined low thickness value and a predetermined high thickness value;
- and
- selecting a thickness value of the different thickness values that provides a highest detector-channel voltage value of the measured different detector-channel voltage values.
Dependencies are inferred from the claim text.