Western Digital Technologies, Inc.

Headway Technologies, Incorporated

Western Digital (fremont), Inc.

Hgst Netherlands, B.v.

Sandisk Technologies Inc.

Suping Song

Lijie Guan

Zhanjie Li

Terence T Lam

Michael Kuok San Ho

Kuok San Ho

Yaguang Wei

Changqing Shi

Zhigang Bai

Venkatesh Chembrolu

Quang Le

Supradeep Narayana

Yuhui Tang

Jian-Gang Zhu

Anna Zheng

Tai Min

Kroum Stanimirov Stoev

Petrus Antonius Van Der Heijden

Alexander Michael Zeltser

Alexander Goncharov

Daniele Mauri

Brian Rodrick York

Yunfei Ding

Ning Shi

Youfeng Zheng

Goran Mihajlovic

Gonçalo Marcos Baião De Albuquerque

Hardayal Singh Gill

Moris Musa Dovek

Xiaoyong Liu

Tao Pan

Muhammad Asif Bashir

Alexander M Taratorin

Susumu Okamura

Michael Ho

Goncalo Baiao De Albuquerque

Cherngye Hwang

Lei Wang

Yue Liu

Xuhui Jin

Sining Mao

Joe Smyth

Matthew R Gibbons

Randall George Simmons

Tobias Maletzky

Biao Sun

Terence Tin-Lok Lam

Guangli Liu

Hai Jiang

Xinjiang Shen

Dayu Zhou

Kyusik Shin

Goncalo Marcos Baião De Albuquerque

Shiwen Huang

Charles W Miller

Masayoshi Endo

April D Hixson-Goldsmith

Wenqin Hao

He Li

Michael Kouk San Ho

Aspects of the present disclosure generally relate to magnetic recording heads (such as write heads of data storage devices) that include multilayer structures to facilitate targeted switching and relatively low coercivity. In one or more embodiments, a magnetic recording head includes an iron-cobalt (FeCo) layer having a crystalline structure that is a cubic lattice structure, a first crystalline layer formed of a first material, and a second crystalline layer between the first crystalline layer and the FeCo layer. The second crystalline layer is formed of a second material different from the first material, and the second crystalline layer interfaces both the FeCo layer and the first crystalline layer. The crystalline structure of the FeCo layer has a texture of <100>.

Multilayer structures for magnetic recording devices to facilitate targeted magnetic switching and low coercivity

The present disclosure generally relates to a magnetic recording system comprising a magnetic recording head. The magnetic recording head comprises a main pole disposed at a media facing surface (MFS). The main pole is disposed between a trailing shield and a leading shield, the trailing shield and the leading shield each extending to the MFS. A first lead is disposed between the main pole and the trailing shield, and the first lead is recessed from the MFS. A first portion of the first lead is disposed in contact with the main pole. A first insulating layer is disposed between and in contact with a second portion of the first lead and the main pole, and the first insulating layer being recessed from the MFS. The first lead and the first insulating layer direct a current through the main pole at a location recessed from the MFS.

Current distal to media facing surface

The present disclosure relates to a magnetic recording head having an exchange biased leading shield or leading edge shield (LES). The LES is a bilayer structure. One or more layers are coupled below the LES such that the LES is disposed between the main pole and the one or more layers. The one or more layers exchange bias the LES such that the upper layer of the LES has a magnetization parallel to the magnetization of the trailing shield. The lower layer of the LES has a magnetization that is antiparallel to the magnetization of the upper layer of the LES. The one or more layers set the preferred direction for the lower layer of the LES and sets the LES as a two-domain state without relying upon the anisotropy field (Hk) of either the upper or lower layers of the LES.

Leading shield for magnetic recording heads

Embodiments of the present disclosure generally relate to a magnetic media drive employing a magnetic recording device. The magnetic recording device comprises a trailing gap disposed adjacent to a first surface of a main pole, a first side gap disposed adjacent to a second surface of the main pole, a second side gap disposed adjacent to a third surface of the main pole, and a leading gap disposed adjacent to a fourth surface of the main pole. A side shield surrounds the main pole and comprises a heavy metal first layer and a magnetic second layer. The first layer surrounds the first, second, and third surfaces of the main pole, or the second, third, and fourth surfaces of the main pole. The second layer surrounds the second and third surfaces of the main pole, and may further surround the fourth surface of the main pole.

Magnetic recording devices using virtual side shields for improved areal density capability

The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a main pole at a media facing surface (MFS), a trailing shield at the MFS, and a heavy metal layer disposed between the main pole and the trailing shield at the MFS. Spin-orbit torque (SOT) is generated from the heavy metal layer and transferred to a surface of the main pole as a current passes through the heavy metal layer in a cross-track direction. The SOT executes a torque on the surface magnetization of the main pole, which reduces the magnetic flux shunting from the main pole to the trailing shield. With the reduced magnetic flux shunting from the main pole to the trailing shield, write-ability is improved.

Areal density capability improvement with a main pole skin

A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and an electrically conductive portion located in a trailing gap between the main pole and the trailing magnetic shield. The electrically conductive portion is not part of a spin torque oscillator stack, and the electrically conductive portion includes at least one electrically conductive, non-magnetic material layer. The main pole and the trailing magnetic shield are electrically shorted by the electrically conductive portion across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the electrically conductive portion.

Magnetic head with assisted magnetic recording comprising an electrically conductive, non-magnetic material

A magnetic head includes a main pole configured to serve as a first electrode, an upper pole containing a trailing magnetic shield configured to a serve as a second electrode, and an electrically conductive portion located in a trailing gap between the main pole and the trailing magnetic shield. The electrically conductive portion is not part of a spin torque oscillator stack, and the electrically conductive portion includes first and second electrically conductive, non-magnetic material layers. The spin torque oscillator stack is coupled to the first electrically conductive, non-magnetic material layer. The main pole and the trailing magnetic shield are electrically shorted by the electrically conductive portion across the trailing gap between the main pole and the trailing magnetic shield such that an electrically conductive path is present between the main pole and the trailing magnetic shield through the electrically conductive portion.

Magnetic head with assisted magnetic recording

The present disclosure generally relates to a magnetic media drive employing a magnetic recording head. The magnetic recording head comprises a main pole, an EAMR stack disposed on the main pole, and a trailing shield disposed on the EAMR stack. The EAMR stack comprises a seed layer disposed on the main pole, a spin torque layer disposed on the seed layer, and a spacer layer disposed on the spin torque layer. At least one surface of the spacer layer in contact with the spin torque layer has a smaller or reduced area than the spin torque layer. The at least one surface of the spacer layer in contact with the spin torque layer is recessed from a media facing surface and has a smaller cross-track width than the spin torque layer and a smaller width in the stripe height direction than the spin torque layer.

Energy assisted magnetic recording head having improved areal density capability

Embodiments of the present disclosure generally relate to magnetic recording systems, and more particularly to a magnetic recording system with a current-assisted write head. The write head comprises a main pole, a trailing shield disposed above the main pole, a trailing gap disposed between the main pole and the trailing shield, a side shield surrounding three sides of the main pole, the side shield being in contact with and disposed below the trailing shield and the trailing gap, and a side gap disposed between the side shield and each of the three sides of the main pole. The side gap comprises a non-magnetic electrically-conducting material to dissipate heat away from the main pole, lowering the resistance and temperature rise due to heating. The trailing gap may further comprise a non-magnetic electrically-conducting material. The write head may have a two terminal or three terminal connection configuration.

Write heads having conducting side gap for directing current

The present disclosure generally relates to data storage devices, and more specifically, to a magnetic media drive employing a magnetic recording head. The head includes a trailing shield, a main pole, an STO disposed between the trailing shield and the main pole, and a non-magnetic conductive structure (or non-magnetic conductive layers) adjacent to the main pole and in contact with the STO. The non-magnetic conductive structure provides additional paths for electrical currents to flow to the STO. The non-magnetic conductive structure enables higher current density to the STO without creating hot spots at the MFS. Maximum current efficiency and uniformity can be achieved with the non-magnetic conductive structure.

Magnetic recording head with non-magnetic conductive structure

Embodiments of the present disclosure generally relate to a magnetic recording device comprising a magnetic recording head having a negative anisotropic magnetic (&#x2212;Ku) material notch. The magnetic recording device comprises a main pole disposed at a media facing surface (MFS), a trailing shield disposed adjacent to the main pole, and a trailing gap disposed between the main pole and the trailing shield. The trailing shield comprises a hot seed layer disposed adjacent to the trailing gap, and a notch comprising a &#x2212;Ku material in contact with the hot seed layer and the trailing gap. The notch is disposed adjacent to a first surface of the main pole at the MFS. The notch comprising the &#x2212;Ku material results in an increased effective write magnetic field, an increased down-track field gradient due to reduced shunting from the main pole to the trailing shield, leading to an increased areal density capacity.

Area density capacity improvement with negative anisotropic magnetic material trailing shield notch

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Fremont, CA, United States of America

Suping Song