US 12,170,162 B2
Warped magnetic tunnel junctions and bit-patterned media
Jannier Maximo Roiz-Wilson, Santa Clara, CA (US)
Assigned to Jannier M. Roiz-Wilson
Filed by Jannier Maximo Roiz-Wilson, Santa Clara, CA (US)
Filed on Dec. 8, 2020, as Appl. No. 17/114,965.
Prior Publication US 2022/0181061 A1, Jun. 9, 2022
Int. Cl. G11B 5/39 (2006.01); H01F 10/32 (2006.01); H10N 52/80 (2023.01)
CPC H01F 10/329 (2013.01) [G11B 5/3909 (2013.01); H01F 10/3254 (2013.01); H01F 10/3286 (2013.01); H10N 52/80 (2023.02)] 10 Claims
OG exemplary drawing
 
1. A magnetic storage device herein referred to as “warped free-layer” comprising: a shape-based dynamic magnetic skyrmion which is a thin film ferromagnetic element shaped in the form of a low-rising bell or dome, either convex or concave, less than 30 nm in diameter, the warped free-layer having a shape including a curved apex and sloping sidewalls extending from the apex, the apex having a radius of curvature smaller than a radius of the diameter of the warped free-layer, the shape of the warped free-layer is configured such that supplemental exchange energy barriers achieve thermal stability through the induction of dynamic vortex magnetization configurations under expressly designed radial components of demagnetization and material-based perpendicular anisotropy fields when a magnetization switch is attempted on it.