公开(公告)号：US11676751B2

公开(公告)日：2023-06-13

申请号：US17188511

申请日：2021-03-01

Applicant: TDK CORPORATION

Inventor： Zhenyao Tang ,  Yohei Shiokawa ,  Tomoyuki Sasaki

IPC: H01F10/32 ,  G11C11/15 ,  G01R33/09

CPC classification number: H01F10/329 ,  G01R33/091 ,  G11C11/15 ,  H01F10/3254

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：US11114609B2

公开(公告)日：2021-09-07

申请号：US16082913

申请日：2017-11-08

Applicant: TDK CORPORATION

Inventor： Zhenyao Tang ,  Tomoyuki Sasaki

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

Abstract: A TMR element includes a magnetic tunnel junction, a side wall portion that is disposed on a side surface of the magnetic tunnel junction, a cap layer that covers a top surface of the magnetic tunnel junction and a surface of the side wall portion, and an upper electrode layer that is disposed on the cap layer. The cap layer includes an upper surface and a lower surface. The upper surface has a protruding shape that protrudes in a direction away from the magnetic tunnel junction in a first region which is positioned immediately above the top surface of the magnetic tunnel junction. The upper surface has a recess that is recessed in a direction toward the side wall portion in a second region which is positioned immediately above the surface of the side wall portion.

公开(公告)号：US10454023B2

公开(公告)日：2019-10-22

申请号：US15976997

申请日：2018-05-11

Applicant: TDK CORPORATION

Inventor： Zhenyao Tang ,  Yohei Shiokawa ,  Tomoyuki Sasaki

IPC: H01L43/02 ,  H01F10/32 ,  G11C11/16 ,  H01L43/08 ,  H01L27/22

Abstract: A spin current magnetization rotational element includes: a ferromagnetic metal layer; a spin-orbit torque wiring configured to extend in a first direction perpendicular to a lamination direction of the ferromagnetic metal layer and formed on one surface of the ferromagnetic metal layer; and a ferromagnetic electrode layer formed outside the ferromagnetic metal layer on any of surfaces of the spin-orbit torque wiring in a top view from the lamination direction. A direction of magnetization of the ferromagnetic metal layer is changeable by spin-orbit torque generated by a spin-orbit interaction in the spin-orbit torque wiring and an influence of spin diffused from the ferromagnetic electrode layer.

公开(公告)号：US09824701B2

公开(公告)日：2017-11-21

申请号：US15138486

申请日：2016-04-26

Applicant: TDK Corporation

Inventor： Zhenyao Tang ,  Tetsuya Roppongi ,  Yoshikazu Soeno ,  Hironobu Matsuzawa ,  Hirokazu Takahashi

IPC: G11B5/31 ,  G11B5/235 ,  G11B5/127 ,  G11B5/00

CPC classification number: G11B5/1278 ,  G11B5/235 ,  G11B5/3116 ,  G11B5/314 ,  G11B5/3146 ,  G11B2005/0024

Abstract: A microwave assisted magnetic head includes a main magnetic pole; a trailing shield; and a spin torque oscillator provided between the main magnetic pole and the trailing shield. The spin torque oscillator has a first end surface configuring a part of an air bearing surface, a second end surface facing the main magnetic pole, and a third end surface facing the first end surface, the first angle θ1 made by the first end surface and the second end surface is smaller than the second angle θ2 formed by the second end surface and the third end surface, and the second angle θ2 is 80 to 100 degrees.