Spin logic with magnetic insulators switched by spin orbit coupling
US-2018240964-A1 · Aug 23, 2018 · US
Electronic synapse having spin-orbit torque induced spike-timing dependent plasticity
US10592802B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10592802-B2 |
| Application number | US-201715445945-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 28, 2017 |
| Priority date | Feb 28, 2016 |
| Publication date | Mar 17, 2020 |
| Grant date | Mar 17, 2020 |
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Abstract
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An electronic synapse is disclosed, comprising a heavy metal layer having a high spin orbit coupling, a domain wall magnet layer having a bottom surface adjacent to a top surface of the heavy metal layer, the domain wall magnet layer having a perpendicular magnetic anisotropy, the domain wall magnet layer having a domain wall, the domain wall running parallel to a longitudinal axis of the domain wall magnet layer, a pinned layer having perpendicular magnetic anisotropy, and an oxide tunnel barrier connected between the domain wall magnet layer and the pinned layer, wherein the pinned layer, the oxide tunnel barrier, and the free layer form a magnetic tunnel junction.
First claim
Opening claim text (preview).
The invention claimed is: 1. An electronic synapse, comprising: a) a heavy metal layer; b) a domain wall magnet layer having a bottom surface adjacent to a top surface of the heavy metal layer, the domain wall magnet layer having a perpendicular magnetic anisotropy, the domain wall magnet layer having a domain wall, the domain wall running parallel to a longitudinal axis of the domain wall magnet layer; c) a pinned layer having perpendicular magnetic anisotropy; d) an oxide tunnel barrier connected between a top surface of the domain wall magnet layer and a bottom surface of the pinned layer, wherein the pinned layer, the oxide tunnel barrier, and the domain wall magnet layer form a magnetic tunnel junction; and e) a non-magnetic electrical contact having a bottom surface in contact with the top surface of the domain wall magnet layer, the non-magnetic electrical contact electrically isolated from the magnetic tunnel junction. 2. The electronic synapse of claim 1 , wherein a bottom surface of the oxide tunnel barrier of the magnetic tunnel junction is attached to a first end of the top surface of the domain wall magnet layer and the non-magnetic electrical contact is attached to a second end of upper surface of the domain wall magnet layer. 3. The electronic synapse of claim 2 , further comprising a current source, the current source configured to: a) supply a spike current from the pinned layer, through the magnetic tunnel junction, through the heavy metal layer to the non-magnetic electrical contact; and b) supply a learning current through the heavy metal layer from the first end of the heavy metal layer to the second end of the heavy metal layer to generate a spin orbit torque on the domain wall magnet layer, wherein the spike current and the learning current are decoupled.
Assignees
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Classifications
- G06N3/049Primary
Temporal neural networks, e.g. delay elements, oscillating neurons or pulsed inputs · CPC title
Non-supervised learning, e.g. competitive learning · CPC title
Electricity · mapped topic
Physics · mapped topic
Analogue means · CPC title
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- What does patent US10592802B2 cover?
- An electronic synapse is disclosed, comprising a heavy metal layer having a high spin orbit coupling, a domain wall magnet layer having a bottom surface adjacent to a top surface of the heavy metal layer, the domain wall magnet layer having a perpendicular magnetic anisotropy, the domain wall magnet layer having a domain wall, the domain wall running parallel to a longitudinal axis of the domai…
- Who is the assignee on this patent?
- Purdue Research Foundation
- What technology area does this patent fall under?
- Primary CPC classification G06N3/049. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 17 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).