Data reader with spin filter
US-2017092302-A1 · Mar 30, 2017 · US
Magnetic sensor, magnetic head, and biomagnetic sensor
US2016154071A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016154071-A1 |
| Application number | US-201514941062-A |
| Country | US |
| Kind code | A1 |
| Filing date | Nov 13, 2015 |
| Priority date | Dec 1, 2014 |
| Publication date | Jun 2, 2016 |
| Grant date | — |
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- Title
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Abstract
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A magnetic sensor includes a channel layer, a magnetization free layer placed on a first section of the channel layer, and a magnetization-fixed layer placed on a second section of the channel layer. The areal resistance of the interface between the channel layer and the magnetization free layer is lower than the areal resistance of the interface between the channel layer and the magnetization-fixed layer.
First claim
Opening claim text (preview).
What is claimed is: 1 . A magnetic sensor comprising: a channel layer; a magnetization free layer placed on a first section of the channel layer; and a magnetization-fixed layer placed on a second section of the channel layer, wherein the areal resistance of the interface between the channel layer and the magnetization free layer is lower than the areal resistance of the interface between the channel layer and the magnetization-fixed layer. 2 . The magnetic sensor according to claim 1 , wherein the magnetization free layer includes a first ferromagnetic sub-layer and a first tunnel barrier sub-layer placed between the first ferromagnetic sub-layer and the channel layer, the magnetization-fixed layer includes a second ferromagnetic sub-layer and a second tunnel barrier sub-layer placed between the second ferromagnetic sub-layer and the channel layer, and the thickness of the first tunnel barrier sub-layer is less than the thickness of the second tunnel barrier sub-layer. 3 . The magnetic sensor according to claim 1 , wherein the thickness of the first section of the channel layer is less than the thickness of the second section of the channel layer. 4 . The magnetic sensor according to claim 1 , wherein the thickness of the second section of the channel layer is less than the thickness of the first section of the channel layer. 5 . A magnetic head comprising: a reading head section including the magnetic sensor according to claim 1 ; and a recording head section for writing. 6 . A biomagnetic sensor comprising a plurality of magnetic sensors having the same configuration as that of the magnetic sensor according to claim 1 .
Assignees
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Classifications
Magnetic field sensors · CPC title
Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves (measuring movement of the entire body or parts thereof A61B5/11; detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof A61B5/24) · CPC title
- G01R33/093Primary
using multilayer structures, e.g. giant magnetoresistance sensors (thin magnetic films H01F10/00) · CPC title
using magneto-resistive devices {or effects} · CPC title
Details related to the use of magnetic thin film layers or to their effects · CPC title
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- What does patent US2016154071A1 cover?
- A magnetic sensor includes a channel layer, a magnetization free layer placed on a first section of the channel layer, and a magnetization-fixed layer placed on a second section of the channel layer. The areal resistance of the interface between the channel layer and the magnetization free layer is lower than the areal resistance of the interface between the channel layer and the magnetization-…
- Who is the assignee on this patent?
- Tdk Corp
- What technology area does this patent fall under?
- Primary CPC classification G01R33/093. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Jun 02 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).