Lateral spin valve reader with vertically-integrated two-dimensional semiconducting channel

Patent metadata

Field	Value
Publication number	US-9934798-B1
Application number	US-201615278996-A
Country	US
Kind code	B1
Filing date	Sep 28, 2016
Priority date	Sep 28, 2016
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

A lateral spin valve reader includes a detector located proximate to a bearing surface of the reader, and a spin injector located away from the bearing surface. The lateral spin valve reader also includes a channel that extends from the detector to the spin injector. The channel includes a two-dimensional semiconducting layer that extends from the detector to the spin injector.

First claim

What is claimed is:

1. A lateral spin valve reader comprising:
a detector that forms a portion of a bearing surface;
a spin injector spaced apart from the bearing surface and the detector;
a channel extending from the bearing surface and the detector to the spin injector, wherein the channel comprises:
a metal seed layer that extends from the bearing surface and the detector located adjacent to the bearing surface to the spin injector;
a two-dimensional semiconducting layer deposited on the metal seed layer and extends from the detector to the spin injector; and
a dielectric tunnel barrier layer deposited over the two-dimensional semiconducting layer and located at least between the two dimensional semiconducting layer and the detector and extends from the bearing surface and the detector to the spin injector.

2. The lateral spin valve reader of claim 1 and wherein the two-dimensional semiconducting layer comprises a graphene monolayer or a transition metal dichalcogenide (TMDC) monolayer.

3. The lateral spin valve reader of claim 1 and wherein the metal seed layer comprises silver or copper.

4. The lateral spin valve reader of claim 1 and wherein the two-dimensional semiconducting layer is divided into a plurality of ribbons.

5. The lateral spin valve reader of claim 1 and further comprising a two-terminal configuration, a three-terminal configuration or a four-terminal configuration.

6. The lateral spin valve reader of claim 1 and wherein the detector, the spin injector, the channel and the dielectric tunnel barrier layer are positioned between a top shield and a bottom shield, wherein at least one of the top shield or the bottom shield comprises an external voltage bias electrode configured to control electrical properties of the two-dimensional semiconducting channel layer.

7. A recording head comprising:
a top shield;
a bottom shield; and
at least one lateral spin valve reader interposed between the top shield and the bottom shield, wherein the at least one lateral spin valve reader comprises:
a detector that forms a portion of a bearing surface;
a spin injector spaced apart from the bearing surface and the detector;
a channel extending from the bearing surface and the detector to the spin injector, wherein the channel comprises:
a metal seed layer that extends from the bearing surface and the detector located adjacent to the bearing surface to the spin injector:
a two-dimensional semiconducting layer deposited on the metal seed layer and extends from the detector to the spin injector; and
a dielectric tunnel barrier layer deposited over the two-dimensional semiconducting layer and located at least between the two dimensional semiconducting layer and the detector and extends from the bearing surface and the detector to the spin injector.

8. The recording head of claim 7 and wherein the two-dimensional semiconducting layer comprise a graphene monolayer or a transition metal dichalcogenide (TMDC) monolayer.

9. The recording head of claim 7 and wherein the metal seed layer comprises silver or copper.

10. The recording head of claim 7 and wherein the two-dimensional semiconducting layer is divided into a plurality of ribbons.

11. The recording head of claim 7 and wherein the at least one lateral spin valve reader comprises a plurality of lateral spin valve readers are interposed between the top shield and the bottom shield.

12. A lateral spin valve reader comprising:
a detector located adjacent to a bearing surface;
a spin injector spaced apart from the bearing surface and the detector;
a channel extending from the bearing surface and the detector to the spin injector, wherein the channel comprises a two-dimensional semiconducting layer that extends from the detector to the spin injector;
a dielectric tunnel barrier layer deposited over the two-dimensional semiconducting layer and located between the two dimensional semiconducting layer and the detector; and
an insulation layer that is substantially coplanar with the spin injector, wherein a surface of the insulation layer comprises perforations, and wherein at least a portion of the two-dimensional semiconducting layer is disposed on the surface of the insulation layer with the perforations.

13. The lateral spin valve reader of claim 12 and wherein the two-dimensional semiconducting layer comprises a graphene monolayer or a transition metal dichalcogenide (TMDC) monolayer.

14. The lateral spin valve reader of claim 12 and wherein a surface of the spin injector comprises perforations, and wherein at least a portion of the two-dimensional semiconducting layer is disposed on the surface of the spin injector with the perforations.

15. The lateral spin valve reader of claim 12 , wherein the dielectric tunnel barrier layer extends from the bearing surface and the detector to the spin injector.

Assignees

• Seagate Technology Llc

Inventors

• Deen David A
• Boonstra Thomas Roy

Classifications

• G11B5/3909

  Arrangements using a magnetic tunnel junction · CPC title

• G11B5/3958

  the active elements being arranged in a single plane, e.g. "matrix" disposition · CPC title

• G11B5/3912 Primary

  Arrangements in which the active read-out elements are transducing in association with active magnetic shields, e.g. magnetically coupled shields (G11B5/3916 takes precedence) · CPC title

• G11B5/3929

  Disposition of magnetic thin films not used for directly coupling magnetic flux from the track to the MR film or for shielding · CPC title

• G11B5/3163

  Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers · CPC title