公开(公告)号：US20190267541A1

公开(公告)日：2019-08-29

申请号：US16082483

申请日：2018-02-28

Applicant: TDK CORPORATION

Inventor： Yohei SHIOKAWA ,  Tomoyuki SASAKI

IPC: H01L43/14 ,  H01L27/22 ,  H01L43/04 ,  H01L43/06 ,  H01L43/10

Abstract: In the method for stabilizing a spin element according to an aspect of the disclosure, the spin element includes a current-carrying part extending in a first direction, and an element part laminated on one surface of the current-carrying part and including a ferromagnetic material, in the case where the environmental temperature is a predetermined temperature, a pulse current having a current density of 1.0×107 A/cm2 or more and 1.0×109 A/cm2 or less and a pulse width within a predetermined range is applied at least a predetermined number of times in the first direction of the current-carrying part at intervals of a predetermined waiting time.

公开(公告)号：US20190267064A1

公开(公告)日：2019-08-29

申请号：US16082456

申请日：2018-02-28

Applicant: TDK CORPORATION

Inventor： Yohei SHIOKAWA ,  Tomoyuki SASAKI

IPC: G11C11/16 ,  H01F10/32 ,  H01L43/02 ,  H01L43/12 ,  H01F41/32

Abstract: In the method for stabilizing a spin element according to an aspect of the disclosure, the spin element includes a current-carrying part extending in a first direction, and an element part laminated on one surface of the current-carrying part and including a ferromagnetic material, a current pulse having a predetermined current value or higher is applied at a predetermined temperature in the first direction of the current-carrying part such that a total pulse application time is equal to or longer than a predetermined time.

公开(公告)号：US20190237119A1

公开(公告)日：2019-08-01

申请号：US16068523

申请日：2018-02-01

Applicant: TDK CORPORATION

Inventor： Tomoyuki SASAKI ,  Yohei SHIOKAWA

IPC: G11C11/16 ,  G11C11/18 ,  G01R33/09 ,  H01L27/22 ,  G11C7/04

CPC classification number: G11C11/1675 ,  G01R33/098 ,  G11C7/04 ,  G11C11/161 ,  G11C11/1659 ,  G11C11/1673 ,  G11C11/18 ,  H01L27/228

Abstract: A data writing method according to an aspect is configured such that a spin-orbit torque-type magnetoresistance effect element includes: a spin-orbit torque wire extending in a first direction; and a functional portion having a first ferromagnetic layer, a non-magnetic layer, and a second ferromagnetic layer stacked on one surface of the spin-orbit torque wire in that order from the spin-orbit torque wire, wherein a voltage applied in the first direction of the spin-orbit torque wire is equal to or higher than a critical writing voltage at an environmental temperature and is equal to or lower than a predetermined value.

公开(公告)号：US20190221733A1

公开(公告)日：2019-07-18

申请号：US16359040

申请日：2019-03-20

Applicant: TDK CORPORATION

Inventor： Tomoyuki SASAKI ,  Yohei SHIOKAWA

IPC: H01L43/04 ,  G11C11/18 ,  H01L43/14 ,  G11C11/16 ,  H01L43/08 ,  H01L43/10

CPC classification number: H01L43/04 ,  G11C11/161 ,  G11C11/18 ,  H01L43/02 ,  H01L43/08 ,  H01L43/10 ,  H01L43/14

Abstract: A spin-orbit torque type magnetization reversal element including a ferromagnetic metal layer with a varying magnetization direction; and spin-orbit torque wiring that extends in a first direction intersecting with a stacking direction of the ferromagnetic metal layer and that is joined to the ferromagnetic metal layer; wherein when viewed from the first direction, the spin-orbit torque wiring is asymmetrical in a second direction that is orthogonal to the first direction and the stacking direction, with respect to an axis that passes through a center, in the second direction, of the ferromagnetic metal layer.

公开(公告)号：US20190103552A1

公开(公告)日：2019-04-04

申请号：US16083202

申请日：2017-10-27

Applicant: TDK CORPORATION

Inventor： Yohei SHIOKAWA ,  Minoru OTA ,  Tomoyuki SASAKI ,  Yoshitomo TANAKA

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

Abstract: A magnetoresistive effect element includes a magnetization fixed layer, a magnetization free layer, and a non-magnetic spacer layer that is stacked between the magnetization fixed layer and the magnetization free layer. The magnetization fixed layer includes a first fixed layer and a second fixed layer that are formed of a ferromagnetic material, and a magnetic coupling layer that is stacked between the first fixed layer and the second fixed layer. The first fixed layer and the second fixed layer are magnetically coupled to each other by exchange coupling via the magnetic coupling layer such that magnetization directions of the first fixed layer and the second fixed layer are antiparallel to each other. The magnetic coupling layer is a non-magnetic layer that includes Ir and at least one of the following elements: Cr, Mn, Fe, Co and Ni.

公开(公告)号：US20190074430A1

公开(公告)日：2019-03-07

申请号：US16113592

申请日：2018-08-27

Applicant: TDK CORPORATION

Inventor： Yohei SHIOKAWA ,  Tomoyuki SASAKI

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

Abstract: A spin flow magnetization reversal element includes a first ferromagnetic metal layer capable of changing a direction of magnetization; and a spin orbit torque wiring layer joined to the first ferromagnetic metal layer and extending in a direction intersecting a direction perpendicular to a plane of the first ferromagnetic metal layer. The spin orbit torque wiring layer includes at least one light element L among B, C, Si and P and at least one noble gas element among Ar, Kr and Xe.

公开(公告)号：US20230077612A1

公开(公告)日：2023-03-16

申请号：US17801865

申请日：2020-05-29

Applicant: TDK CORPORATION

Inventor： Yohei SHIOKAWA ,  Tomoyuki SASAKI ,  Takeshi SEKI ,  Koki TAKANASHI

IPC: H01L43/04 ,  H01L27/22 ,  H01L43/06 ,  H01L43/10 ,  H01L43/14

Abstract: A magnetic film includes a ferromagnetic layer. The ferromagnetic layer has a thickness or a width in a first direction which is longer than a thickness or a width in another direction, a crystalline structure is a tetragonal structure, and a main vector direction of a c axis of the tetragonal structure is the first direction.

公开(公告)号：US20220406995A1

公开(公告)日：2022-12-22

申请号：US17777452

申请日：2020-02-07

Applicant: TDK CORPORATION

Inventor： Yohei SHIOKAWA

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

Abstract: A magnetic recording array includes a plurality of spin elements arranged in a matrix, each spin element including a wiring and a stacked body that includes a first ferromagnetic layer stacked on the wiring, a plurality of write wirings connected to first ends of the respective wirings in the plurality of spin elements, a plurality of read wirings connected to the respective stacked bodies in the plurality of spin elements, and a plurality of common wirings connected to second ends of the wirings in the respective spin elements belonging to the same row, wherein the common wiring has an electrical resistance lower than the electrical resistance of the write wiring or the read wiring.

公开(公告)号：US20220277877A1

公开(公告)日：2022-09-01

申请号：US17188511

申请日：2021-03-01

Applicant: TDK CORPORATION

Inventor： Zhenyao TANG ,  Yohei SHIOKAWA ,  Tomoyuki SASAKI

IPC: H01F10/32

Abstract: A magnetic device is equipped with a stacked body including a first ferromagnetic layer, a second ferromagnetic layer, and a non-magnetic layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer; and an insulator which covers at least a part of side surfaces of the stacked body, in which the insulator has a space outside the side surface of the stacked body.

公开(公告)号：US20220254992A1

公开(公告)日：2022-08-11

申请号：US17171623

申请日：2021-02-09

Applicant: TDK CORPORATION

Inventor： Zhenyao TANG ,  Yohei SHIOKAWA ,  Tomoyuki SASAKI

IPC: H01L43/04 ,  H01L27/22 ,  H01L43/06 ,  H01L43/10 ,  H01L43/14

Abstract: A magnetic device includes a stacked body including a first ferromagnetic layer, a second ferromagnetic layer, and a non-magnetic layer sandwiched between the first ferromagnetic layer and the second ferromagnetic layer; a first insulating layer which covers side surfaces of the stacked body; and a radiator located outside the first insulating layer with respect to the stacked body, in which a distance between the stacked body and the radiator differs depending on a position of the stacked body in a stacking direction.