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US 2025/0164585 A1Published application
Tmr sensor having tuned vortex response
AssigneeAllegro MicroSystems, LLC
InventorsPaolo Campiglio, Samridh Jaiswal, Maxime Rioult, Noémie Belin
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Abstract
Methods and apparatus for a device having a TMR element that includes a free layer, a spacer layer, and a reference layer. In embodiments, the free layer comprises a vortex layer configured to provide a magnetic vortex, and a coupling layer magnetically coupled to the vortex layer to modulate the vortex in the vortex layer.
Claims30
A device, comprising:
- a TMR element comprising a free layer, a spacer layer, and a reference layer, wherein the free layer comprises:
- a vortex layer configured to provide a magnetic vortex;
- and
- a perpendicular layer having a magnetic field orientation that is perpendicular to a plane of the vortex layer.
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A method, comprising:
- forming a TMR element comprising a free layer, a spacer layer, and a reference layer, wherein forming the free layer comprises:
- configuring a vortex layer to provide a magnetic vortex;
- and
- forming a perpendicular layer having a magnetic field orientation that is perpendicular to a plane of the vortex layer.
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Dependencies are inferred from the claim text.