US 12,412,597 B2 · Non-localized spin valve multi-free-layer reader hybridized with spin orbit torque layers

Abstract

The present disclosure generally relates to a magnetic recording head comprising a read head. The read head comprises a first sensor disposed at a media facing surface (MFS) comprising at least one free layer, a second sensor disposed at the MFS comprising at least one free layer, a first spin generator spaced from the first sensor and recessed from the MFS, and a second spin generator spaced from the second sensor and recessed from the MFS. The first and second spin generators each individually comprises at least one spin orbit torque (SOT) layer. The SOT layer may comprise BiSb. The first and second sensors are configured to detect a read signal using a first voltage lead and a second voltage lead. The first and second spin generators are configured to inject spin current through non-magnetic layers to the first and second sensors using a plurality of current leads.

Claims19

Dependent claims

A read head, comprising:

a first shield;
a second shield;
a first non-magnetic layer disposed between the first shield and the second shield;
a first sensor disposed between the first non-magnetic layer and the second shield at a media facing surface (MFS), the first sensor comprising a first free layer;
a first spin generator recessed from the MFS, the first spin generator being spaced from the first sensor wherein the first spin generator comprises a first seed layer, a first non-magnetic spin orbit torque (SOT) layer, and a first cap layer;
a third shield disposed over the second shield;
a second non-magnetic layer disposed between the second shield and the third shield;
a second sensor disposed between the second non-magnetic layer and the third shield at the MFS, the second sensor comprising a second free layer;
and
a second spin generator recessed from the MFS, the second spin generator being spaced from the second sensor, wherein the second spin generator comprises a second seed layer, a second non-magnetic SOT layer, and a second cap layer.

7 more elements

A magnetic recording head, comprising:

a read head, the read head comprising:
a first shield, the first shield comprising a first shield notch;
a second shield disposed over the first shield;
a first non-magnetic layer disposed between the first shield notch and the second shield;
a first sensor disposed between the first non-magnetic layer and the second shield at a media facing surface (MFS), the first sensor comprising a first free layer;
a first spin generator disposed between the first shield and the second shield recessed from the MFS, the first spin generator being spaced from the first sensor, wherein the first spin generator comprises:
a first seed layer;
a first non-magnetic spin orbit torque (SOT) layer disposed between the first shield and the first non-magnetic layer;
a second non-magnetic SOT layer disposed between the first non-magnetic layer and the second shield;
and
a first cap layer;
a third shield disposed over the second shield, the third shield comprising a second shield notch;
a fourth shield disposed over the third shield;
a second non-magnetic layer disposed between the second shield notch and the fourth shield;
a second sensor disposed between the second non-magnetic layer and the fourth shield at the MFS, the second sensor comprising a second free layer;
and
a second spin generator disposed between the third shield and the fourth shield recessed from the MFS, the second spin generator being spaced from the second sensor, wherein the second spin generator comprises:
a second seed layer;
a third non-magnetic SOT layer disposed between the third shield and the second non-magnetic layer;
a fourth non-magnetic SOT layer disposed between the second non-magnetic layer and the fourth shield;
and
a second cap layer.

19 more elements

Dependencies are inferred from the claim text.

Non-localized spin valve multi-free-layer reader hybridized with spin orbit torque layers

Life of this patent

Non-localized spin valve multi-free-layer reader hybridized with spin orbit torque layers

Life of this patent

Abstract

Claims19