Magnetic device including multiferroic regions and methods of forming the same
AssigneeWestern Digital Technologies, Inc.
InventorsBhagwati PRASAD, Alan KALITSOV
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Abstract
A magnetic device includes a first electrode, a second electrode, a plurality of magnetic junctions each containing a ferromagnetic reference layer and a ferromagnetic free layer located between the first electrode and the second electrode, and a plurality of magnetoelectric multiferroic portions having different structural defect densities located between the first electrode and the second electrode. Each of the plurality of magnetoelectric multiferroic portions is magnetically coupled to the ferromagnetic free layer of a respective one of the plurality of magnetic junctions.
Claims20
A magnetic device, comprising:
- a first electrode;
- a second electrode;
- a plurality of magnetic junctions each comprising a ferromagnetic reference layer and a ferromagnetic free layer located between the first electrode and the second electrode;
- and
- a plurality of magnetoelectric multiferroic portions having different structural defect densities located between the first electrode and the second electrode, wherein each of the plurality of magnetoelectric multiferroic portions is magnetically coupled to the ferromagnetic free layer of a respective one of the plurality of magnetic junctions.
A method of forming a magnetic device, comprising:
- forming a bottom electrode;
- forming a continuous magnetoelectric multiferroic layer over the bottom electrode;
- forming a plurality of magnetoelectric multiferroic portions in the continuous magnetoelectric multiferroic layer by structurally damaging different portions of the continuous magnetoelectric multiferroic layer with different structural defect densities;
- forming a plurality of magnetic junctions located over or under the plurality of magnetoelectric multiferroic portions, wherein each of the magnetic junctions comprises a respective reference layer and a respective free layer contacting a respective one of the magnetoelectric multiferroic portions;
- and
- forming a top electrode over the bottom electrode, the plurality of magnetoelectric multiferroic portions and the plurality of magnetic junctions.
Dependencies are inferred from the claim text.