公开(公告)号：US10026432B1

公开(公告)日：2018-07-17

申请号：US13789312

申请日：2013-03-07

Applicant: Seagate Technology LLC

Inventor： Thomas P. Nolan ,  Kai Chieh Chang ,  Yukiko Kubota ,  Yingguo Peng ,  Jan-Ulrich Thiele

IPC: G11B5/66 ,  G11B5/738

Abstract: A magnetic stack includes a interlayer structure and a magnetic recording layer disposed over the interlayer in the magnetic stack. The magnetic recording layer includes substantially ordered L10, oriented crystalline magnetic grains laterally separated by a nonmagnetic, segregant material. The interlayer structure comprises a first layer having cubic crystal structure including oriented crystalline grains and a second layer having crystalline grains laterally separated by a segregant material. The crystalline grains of the second layer are arranged in substantially vertically contiguous alignment with the crystalline grains of the first layer and the segregant material of the magnetic recording layer is arranged in substantially vertically contiguous alignment with the segregant material of the second layer.

公开(公告)号：US09779771B1

公开(公告)日：2017-10-03

申请号：US15083735

申请日：2016-03-29

Applicant: Seagate Technology LLC

Inventor： Kangkang Wang ,  Yingguo Peng ,  Ganping Ju ,  Xiaobin Zhu ,  Li Gao ,  Yinfeng Ding ,  Kai Chieh Chang ,  Timothy J. Klemmer ,  Yukiko Kubota ,  Jan-Ulrich Thiele ,  Thomas P. Nolan

IPC: G11B5/65 ,  G11B5/72 ,  G11B5/00 ,  G11B5/66

CPC classification number: G11B5/653 ,  G11B5/66 ,  G11B5/72 ,  G11B5/82 ,  G11B2005/0021

Abstract: A stack includes a substrate, a magnetic recording layer comprising FePtX disposed over the substrate, and a capping layer disposed on the magnetic recording layer. The capping layer comprises Co; at least one rare earth element; one or more elements selected from a group consisting of Fe and Pt; and an amorphizing agent comprising one to three elements selected from a group consisting of B, Zr, Ta, Cr, Nb, W, V, and Mo.

公开(公告)号：US09589588B2

公开(公告)日：2017-03-07

申请号：US15149361

申请日：2016-05-09

Applicant: Seagate Technology LLC

Inventor： Kangkang Wang ,  Xiaobin Zhu ,  Ganping Ju ,  Kai Chieh Chang ,  Yingguo Peng ,  Timothy J. Klemmer ,  Jan-Ulrich Thiele

IPC: G11B7/12 ,  G11B7/1267 ,  G11B5/024 ,  G11B5/00 ,  G11B27/36

CPC classification number: G11B7/1267 ,  G01R33/0325 ,  G11B5/024 ,  G11B5/4555 ,  G11B27/36 ,  G11B2005/0021

Abstract: An apparatus comprises a spindle to rotate a magnetic recording medium and a magnetic field generator to expose a track of the medium to a DC magnetic field. The magnetic field generator is configured to saturate the track during an erase mode and reverse the DC magnetic field impinging the track during a writing mode. A laser arrangement heats the track during the erase mode and, during the writing mode, heats the track while the track is exposed to the reversed DC magnetic field so as to write a magnetic pattern thereon. A reader reads the magnetic pattern and generates a read signal. A processor is coupled to the reader and configured to measure one or more magnetic properties of the track using the read signal. The apparatus can further comprise a Kerr sensor that generates a Kerr signal using the magnetic pattern.

Abstract translation: 一种装置包括用于旋转磁记录介质的主轴和磁场发生器，以将介质的轨道暴露于DC磁场。 磁场发生器被配置为在擦除模式期间使轨道饱和，并在写入模式期间逆转撞击轨道的直流磁场。 激光装置在擦除模式期间加热轨道，并且在写入模式期间，加热轨道，同时轨道暴露于反向的DC磁场，以便在其上写入磁性图案。 读取器读取磁性图案并产生读取信号。 处理器耦合到读取器并且被配置为使用读取信号来测量轨道的一个或多个磁性。 该装置还可以包括使用磁图案产生克尔信号的克尔传感器。

公开(公告)号：US09336832B1

公开(公告)日：2016-05-10

申请号：US14720250

申请日：2015-05-22

Applicant: Seagate Technology LLC

Inventor： Kangkang Wang ,  Xiaobin Zhu ,  Ganping Ju ,  Kai Chieh Chang ,  Yingguo Peng ,  Timothy J. Klemmer ,  Jan-Ulrich Thiele

IPC: G11B11/00 ,  G11B27/36 ,  G11B5/024 ,  G11B5/09 ,  G11B5/00

CPC classification number: G11B7/1267 ,  G01R33/0325 ,  G11B5/024 ,  G11B5/4555 ,  G11B27/36 ,  G11B2005/0021

Abstract: An apparatus comprises a spindle to rotate a magnetic recording medium and a magnetic field generator to expose a track of the medium to a DC magnetic field. The magnetic field generator is configured to saturate the track during an erase mode and reverse the DC magnetic field impinging the track during a writing mode. A laser arrangement heats the track during the erase mode and, during the writing mode, heats the track while the track is exposed to the reversed DC magnetic field so as to write a magnetic pattern thereon. A reader reads the magnetic pattern and generates a read signal. A processor is coupled to the reader and configured to measure one or more magnetic properties of the track using the read signal. The apparatus can further comprise a Kerr sensor that generates a Kerr signal using the magnetic pattern.

Abstract translation: 一种装置包括用于旋转磁记录介质的主轴和磁场发生器，以将介质的轨道暴露于DC磁场。 磁场发生器被配置为在擦除模式期间使轨道饱和，并在写入模式期间逆转撞击轨道的直流磁场。 激光装置在擦除模式期间加热轨道，并且在写入模式期间，加热轨道，同时轨道暴露于反向的DC磁场，以便在其上写入磁性图案。 读取器读取磁性图案并产生读取信号。 处理器耦合到读取器并且被配置为使用读取信号来测量轨道的一个或多个磁性。 该装置还可以包括使用磁图案产生克尔信号的克尔传感器。

公开(公告)号：US20160099016A1

公开(公告)日：2016-04-07

申请号：US14965579

申请日：2015-12-10

Applicant: Seagate Technology LLC

Inventor： Yukiko Kubota ,  Timothy John Klemmer ,  Kai Chieh Chang ,  Li Gao ,  Yinfeng Ding ,  Yingguo Peng ,  Jan-Ulrich Thiele

IPC: G11B5/65 ,  G11B5/851

CPC classification number: G11B5/65 ,  G11B5/647 ,  G11B5/66 ,  G11B5/7325 ,  G11B5/851

Abstract: A stack includes a substrate and a magnetic recording layer. Disposed between the substrate and magnetic recording layer is an MgO—Ti(ON) layer.