公开(公告)号：US20210167278A1

公开(公告)日：2021-06-03

申请号：US17104931

申请日：2020-11-25

Applicant: TDK CORPORATION

Inventor： Yugo ISHITANI ,  Tomoyuki SASAKI ,  Yohei SHIOKAWA

IPC: H01L43/08 ,  H01L43/02 ,  H01L43/10 ,  H01L43/12 ,  G11C11/16 ,  H01L27/22

Abstract: A magnetization rotational element includes a spin-orbit torque wiring, and a first ferromagnetic layer which is located in a first direction with respect to the spin-orbit torque wiring and in which spins are injected from the spin-orbit torque wiring. The spin-orbit torque wiring has a plurality of spin generation layers and insertion layers located between the plurality of spin generation layers in the first direction. The insertion layers have a lower electrical resistivity than the spin generation layers.

公开(公告)号：US20210098040A1

公开(公告)日：2021-04-01

申请号：US16953851

申请日：2020-11-20

Applicant: TDK CORPORATION

Inventor： Yohei SHIOKAWA ,  Tomoyuki SASAKI

IPC: G11C11/16 ,  H01L43/04 ,  H01L43/10 ,  H01L27/22 ,  H01L29/82 ,  H01L43/08 ,  H01L27/105 ,  H01L21/8239

Abstract: Provided is a spin current magnetization rotational element, including: a first ferromagnetic metal layer for a magnetization direction to be changed; and a spin-orbit torque wiring which extends in a second direction intersecting a first direction that is a plane-orthogonal direction of the first ferromagnetic metal layer, the first ferromagnetic metal layer being located on one surface of the spin-orbit torque wiring, wherein the spin-orbit torque wiring has a structure in which a spin conduction layer and an interfacial spin generation layer are alternately laminated in the first direction, a number of a plurality of the interfacial spin generation layers is two or more, and at least one of the plurality of the interfacial spin generation layer is made of a compound.

公开(公告)号：US20210020216A1

公开(公告)日：2021-01-21

申请号：US16912832

申请日：2020-06-26

Applicant: TDK CORPORATION

Inventor： Yohei SHIOKAWA

IPC: G11C11/16 ,  H01L43/08 ,  H01L43/10 ,  H01L43/04 ,  H01L27/22 ,  G01R33/09

Abstract: A magnetoresistance effect element where asymmetry of an inversion current due to a leakage magnetic field from a magnetization fixed layer is decreased. A magnetoresistance effect element includes a first ferromagnetic layer whose magnetization direction is variable, a second ferromagnetic layer whose magnetization direction is fixed, and a nonmagnetic layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer which are laminated in a first direction which is a lamination direction, where both the first ferromagnetic layer and the second ferromagnetic layer are curved so that central portions of the first and second ferromagnetic layers protrude with respect to outer circumferential portions in the first direction, and protruding directions of the central portions are opposite to each other so that a distance between the outer circumferential portions is larger than a distance between the central portions in the first direction.

公开(公告)号：US20200335691A1

公开(公告)日：2020-10-22

申请号：US16807704

申请日：2020-03-03

Applicant: TDK CORPORATION

Inventor： Tomoyuki SASAKI ,  Yohei SHIOKAWA ,  Minoru SANUKI

IPC: H01L43/02 ,  H01F10/32

Abstract: A spin-orbit-torque magnetization rotational element and a spin-orbit-torque magnetoresistance effect element capable of easily rotating or reversing magnetization of a ferromagnetic layer. The spin-orbit-torque magnetization rotational element includes spin-orbit-torque wiring and a first ferromagnetic layer laminated on the spin-orbit-torque wiring in a first direction, wherein the spin-orbit-torque wiring includes a first region extending in a second direction, a second region extending in a third direction different from the second direction, and an intersection region where the first region and the second region intersect, and wherein the first ferromagnetic layer and the intersection region at least partially overlap in a plan view from the first direction.

公开(公告)号：US20200235290A1

公开(公告)日：2020-07-23

申请号：US16844249

申请日：2020-04-09

Applicant: TDK CORPORATION

Inventor： Tomoyuki SASAKI ,  Yohei SHIOKAWA ,  Eiji KOMURA ,  Keita SUDA

IPC: H01L43/10 ,  G11C11/18 ,  G11C11/16 ,  H01L43/08 ,  H01L43/06

Abstract: Provided is a spin-orbit-torque magnetization rotational element that suppresses re-adhesion of impurities during preparation and allows a write current to easily flow. The spin-orbit-torque magnetization rotational element includes a spin-orbit torque wiring that extends in a first direction, and a first ferromagnetic layer that is located on a side of one surface of the spin-orbit torque wiring. A side surface of the spin-orbit torque wiring and a side surface of the first ferromagnetic layer form a continuous inclined surface in any side surface.

公开(公告)号：US20200176043A1

公开(公告)日：2020-06-04

申请号：US16785987

申请日：2020-02-10

Applicant: TDK CORPORATION

Inventor： Yohei SHIOKAWA ,  Tomoyuki SASAKI

IPC: G11C11/16 ,  H01L43/04 ,  H01L43/10 ,  H01L27/22 ,  H01L29/82 ,  H01L43/08 ,  H01L27/105 ,  H01L21/8239

Abstract: Provided is a spin current magnetization rotational element including: a first ferromagnetic metal layer for a magnetization direction to be changed; and a spin-orbit torque wiring. The spin-orbit torque wiring has a structure in which a spin conduction layer and an interfacial spin generation layer are alternately laminated in the first direction, the number of a plurality of the interfacial spin generation layers is two or greater, and in the spin-orbit torque wiring, one of the plurality of interfacial spin generation layers is closest to the first ferromagnetic metal layer.

公开(公告)号：US20190386207A1

公开(公告)日：2019-12-19

申请号：US16547670

申请日：2019-08-22

Applicant: TDK CORPORATION

Inventor： Tomoyuki SASAKI ,  Yohei SHIOKAWA

IPC: H01L43/06 ,  H01L43/12 ,  H01L43/10 ,  H01L43/04 ,  G11C11/16

Abstract: A spin-orbit torque type magnetoresistance effect element including a magnetoresistance effect element having a first ferromagnetic metal layer with a fixed magnetization direction, a second ferromagnetic metal layer with a varying magnetization direction, and a non-magnetic layer sandwiched between the first ferromagnetic metal layer and the second ferromagnetic metal layer; and spin-orbit torque wiring that extends in a first direction intersecting with a stacking direction of the magnetoresistance effect element and that is joined to the second ferromagnetic metal layer; wherein the magnetization of the second ferromagnetic metal layer is oriented in the stacking direction of the magnetoresistance effect element; and the second ferromagnetic metal layer has shape anisotropy, such that a length along the first direction is greater than a length along a second direction orthogonal to the first direction and to the stacking direction.

公开(公告)号：US20190355401A1

公开(公告)日：2019-11-21

申请号：US16412541

申请日：2019-05-15

Applicant: TDK CORPORATION

Inventor： Yohei SHIOKAWA

IPC: G11C11/16 ,  H01L43/10 ,  H01L43/08 ,  H01L43/06 ,  H01L27/22

Abstract: A spin-orbit torque magnetization rotating element includes a spin-orbit torque wiring and a laminated body laminated on the spin-orbit torque wiring. The laminated body includes a first ferromagnetic layer independently having an axis of easy magnetization in a first direction, a nonmagnetic antiferromagnetic coupling layer, and a second ferromagnetic layer independently having an axis of easy magnetization in a second direction, in order from the side of the spin-orbit torque wiring, and the first direction crosses the second direction.

公开(公告)号：US20190333560A1

公开(公告)日：2019-10-31

申请号：US16068792

申请日：2018-02-01

Applicant: TDK CORPORATION

Inventor： Tomoyuki SASAKI ,  Yohei SHIOKAWA

IPC: G11C11/16 ,  H01F10/32 ,  H01L21/66 ,  H01L43/12 ,  H01L43/02

Abstract: A data writing method is configured such that a spin device includes a conducting portion extending in a first direction and a device portion stacked on one surface of the conducting portion and including a non-magnetic layer and a ferromagnetic layer, wherein an energy equal to or smaller than an energy represented by a predetermined relational expression (1) is applied in the first direction of the conducting portion when the pulse width of an applied pulse is t.

公开(公告)号：US20190305763A1

公开(公告)日：2019-10-03

申请号：US16414838

申请日：2019-05-17

Applicant: TDK CORPORATION

Inventor： Jiro YOSHINARI ,  Tomoyuki SASAKI ,  Yohei SHIOKAWA

IPC: H03K3/84 ,  H01L43/08 ,  H01L43/04 ,  H01F10/32 ,  H04L9/08 ,  G06F7/58

Abstract: A random number generator capable of generating a natural random number using a spin-orbit torque (SOT) is provided. The random number generator includes a ferromagnetic metal layer and a spin-orbit torque wiring extending in a first direction crossing a lamination direction of the ferromagnetic metal layer and being joined to the ferromagnetic metal layer, wherein the direction of spins injected from the spin-orbit torque wiring into the ferromagnetic metal layer and an easy magnetization direction of the ferromagnetic metal layer intersect each other.