公开(公告)号：US20250087236A1

公开(公告)日：2025-03-13

申请号：US18960779

申请日：2024-11-26

Applicant: Western Digital Technologies, Inc.

Inventor： Muhammad Asif BASHIR ,  Alexander GONCHAROV ,  Zhigang BAI ,  Masato SHIIMOTO ,  Yunfei DING

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

Abstract: The present disclosure is generally related to a magnetic recording device comprising a magnetic recording head. The magnetic recording head comprises a main pole, a shield, and a spintronic device disposed between the main pole and the shield. The spintronic device comprises two field generation layers (FGLs), two spin polarization layers (SPLs), and two spin kill layers. The spintronic device further comprises one or more optional thin negative beta material layers, such as layers comprising FeCr, disposed in contact with at least one of the spin kill layers. When electric current is applied, the spin kill layers and optional negative beta material layers eliminate or reduce any spin torque between the FGLs and the SPLs.

公开(公告)号：US20190295572A1

公开(公告)日：2019-09-26

申请号：US16440922

申请日：2019-06-13

Applicant: Western Digital Technologies, Inc.

Inventor： James Terrence OLSON ,  Hiroyuki HOSHIYA ,  Alexander GONCHAROV ,  Masato SHIIMOTO ,  Mikito SUGIYAMA

IPC: G11B5/39

Abstract: Disclosed herein are magnetic write heads and hard disk drives comprising such magnetic write heads. A magnetic head comprises a magnetic pole, a first shield separated from the magnetic pole at an air-bearing surface (ABS) of the magnetic head, a magnetic layer disposed between the magnetic pole and the first shield, wherein the magnetic layer comprises at least of iron, cobalt, or nickel, a first non-magnetic layer disposed between the magnetic pole and the magnetic layer, and a second non-magnetic layer disposed between the magnetic layer and the first shield, wherein the magnetic layer is the only magnetic layer at the ABS that is between the main pole and the first shield that is not adjacent to the main pole or the first shield.

公开(公告)号：US20250087235A1

公开(公告)日：2025-03-13

申请号：US18959957

申请日：2024-11-26

Applicant: Western Digital Technologies, Inc.

Inventor： Muhammad ASIF BASHIR ,  Alexander GONCHAROV ,  Zhigang BAI ,  Masato SHIIMOTO ,  Yunfei DING

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

Abstract: The present disclosure is generally related to a magnetic recording device comprising a magnetic recording head. The magnetic recording head comprises a main pole, a hot seed layer, and a spintronic device disposed between the main pole and the hot seed layer. The spintronic device comprises two field generation layers (FGLs), two spin polarization layers (SPLs), and two spin kill layers. The second SPL of the spintronic device drives the second FGL. The spintronic device further comprises one or more optional thin negative beta material layers, such as layers comprising FeCr, disposed in contact with at least one of the spin kill layers. When electric current is applied, the spin kill layers and optional negative beta material layers eliminate or reduce any spin torque between the FGLs and the SPLs.

公开(公告)号：US20240144963A1

公开(公告)日：2024-05-02

申请号：US18226111

申请日：2023-07-25

Applicant: Western Digital Technologies, Inc.

Inventor： Muhammad ASIF BASHIR ,  Alexander GONCHAROV ,  Zhigang BAI ,  Masato SHIIMOTO ,  Yunfei DING

IPC: G11B5/31

CPC classification number: G11B5/3116 ,  G11B5/314

Abstract: The present disclosure is generally related to a magnetic recording device comprising a magnetic recording head. The magnetic recording head comprises a main pole, a hot seed layer, and a spintronic device disposed between the main pole and the hot seed layer. The spintronic device comprises two field generation layers (FGLs), two spin polarization layers (SPLs), and two spin kill layers. The second SPL of the spintronic device drives the second FGL. The spintronic device further comprises one or more optional thin negative beta material layers, such as layers comprising FeCr, disposed in contact with at least one of the spin kill layers. When electric current is applied, the spin kill layers and optional negative beta material layers eliminate or reduce any spin torque between the FGLs and the SPLs.

公开(公告)号：US20240144962A1

公开(公告)日：2024-05-02

申请号：US18226109

申请日：2023-07-25

Applicant: Western Digital Technologies, Inc.

Inventor： Muhammad ASIF BASHIR ,  Alexander GONCHAROV ,  Zhigang BAI ,  Masato SHIIMOTO ,  Yunfei DING

IPC: G11B5/31

CPC classification number: G11B5/3116 ,  G11B5/314

Abstract: The present disclosure is generally related to a magnetic recording device comprising a magnetic recording head. The magnetic recording head comprises a main pole, a shield, and a spintronic device disposed between the main pole and the shield. The spintronic device comprises two field generation layers (FGLs), two spin polarization layers (SPLs), and two spin kill layers. The spintronic device further comprises one or more optional thin negative beta material layers, such as layers comprising FeCr, disposed in contact with at least one of the spin kill layers. When electric current is applied, the spin kill layers and optional negative beta material layers eliminate or reduce any spin torque between the FGLs and the SPLs.

公开(公告)号：US20200342899A1

公开(公告)日：2020-10-29

申请号：US16857423

申请日：2020-04-24

Applicant: Western Digital Technologies, Inc.

Inventor： James Terrence OLSON ,  Hiroyuki HOSHIYA ,  Alexander GONCHAROV ,  Masato SHIIMOTO ,  Mikito SUGIYAMA

IPC: G11B5/127 ,  G11B5/31 ,  G11B5/23 ,  G11B5/02 ,  G11B5/39 ,  G11B5/66 ,  G11B5/455 ,  G11B5/714

Abstract: A write head for a data storage device comprises a main pole, a trailing shield, and a write-field enhancement structure disposed in a write gap between the main pole and the trailing shield. The write-field enhancement structure comprises a non-magnetic spacer, a non-magnetic layer, and a magnetic DC-field-generation (DFG) layer. The DFG layer is sandwiched between the non-magnetic layer and the non-magnetic spacer. The write head also includes at least one magnetic notch adjacent to at least one of the main pole or the trailing shield. The non-magnetic spacer is adjacent to a magnetic notch. Some embodiments include multiple magnetic notches. Also disclosed are data storage devices comprising such write heads.

公开(公告)号：US20200234729A1

公开(公告)日：2020-07-23

申请号：US16748881

申请日：2020-01-22

Applicant: Western Digital Technologies, Inc.

Inventor： James Terrence OLSON ,  Hiroyuki HOSHIYA ,  Alexander GONCHAROV ,  Masato SHIIMOTO ,  Mikito SUGIYAMA

IPC: G11B5/39 ,  G11B5/31

Abstract: Disclosed herein are magnetic write heads for providing spin-torque-assisted write field enhancement, and hard disk drives comprising such magnetic write heads. Within the write gap, each magnetic write head comprises a main pole, a trailing shield, a spacer disposed between the main pole and the trailing shield, a non-magnetic layer disposed between the main pole and the trailing shield, and a magnetic DC-field-generation (DFG) layer adjacent to the spacer and disposed between the spacer and the non-magnetic layer. In some embodiments, the DFG layer is the only magnetic layer within the write gap that is not adjacent to the main pole or the trailing shield.