公开(公告)号：US10006884B1

公开(公告)日：2018-06-26

申请号：US14822103

申请日：2015-08-10

Applicant: Seagate Technology LLC

Inventor： Ganping Ju ,  Jason L Presseky ,  Roy W. Chantrell ,  Xiaowei Wu ,  Xi Chen ,  Xiaobin Zhu ,  Yingguo Peng

IPC: G01R33/00 ,  G01N27/80

CPC classification number: G01N27/80 ,  G01K7/00 ,  G03G5/16 ,  G06F17/18 ,  G11B11/10591 ,  G11B2005/0021 ,  H01F41/304 ,  H01L37/00 ,  H01L37/04

Abstract: Determining a Curie temperature (Tc) distribution of a sample comprising magnetic material involves subjecting the sample to an electromagnetic field, heating the sample over a range of temperatures, generating a signal representative of a parameter of the sample that changes as a function of changing sample temperature while the sample is subjected to the electromagnetic field, and determining the Tc distribution of the sample using the generated signal and a multiplicity of predetermined parameters of the sample.

公开(公告)号：US09799363B2

公开(公告)日：2017-10-24

申请号：US13802354

申请日：2013-03-13

Applicant: Seagate Technology LLC

Inventor： Xi Chen ,  Yingguo Peng ,  Jan-Ulrich Thiele ,  Ganping Ju ,  Thomas Roscamp

IPC: G11B5/65 ,  G11B5/716 ,  G11B5/68 ,  G11B5/66

CPC classification number: G11B5/716 ,  G11B5/65 ,  G11B5/66 ,  G11B5/68

Abstract: A magnetic stack includes a substrate and a magnetic recording layer disposed over the substrate. The magnetic recording layer comprises magnetic crystalline grains and a segregant disposed between grain boundaries of the crystalline grains. One or both of the magnetic crystalline grains and the segregant are doped with a rare earth or transition metal dopant in an amount that provides the magnetic recording layer with a magnetic damping value, α, between about 0.1 to about 1.

公开(公告)号：US09689065B2

公开(公告)日：2017-06-27

申请号：US14577641

申请日：2014-12-19

Applicant: Seagate Technology LLC

Inventor： Jingsheng Chen ,  Kaifeng Dong ,  Ganping Ju ,  Yingguo Peng

IPC: G11B5/66 ,  C23C14/06 ,  G11B5/65 ,  G11B5/73 ,  C23C14/08 ,  C23C14/16 ,  C23C14/35

CPC classification number: C23C14/06 ,  C23C14/0641 ,  C23C14/083 ,  C23C14/165 ,  C23C14/352 ,  G11B5/65 ,  G11B5/7325

Abstract: A stack includes a substrate, a magnetic recording layer having a columnar structure, and an interlayer disposed between the substrate and the magnetic recording layer. The columnar structure includes magnetic grains separated by a crystalline segregant or a combination of crystalline and amorphous segregants.

公开(公告)号：US09685183B2

公开(公告)日：2017-06-20

申请号：US14451779

申请日：2014-08-05

Applicant: Seagate Technology LLC

Inventor： Yingguo Peng ,  Xiaowei Wu ,  Ganping Ju ,  Bin Lu

IPC: G11B5/66 ,  G11B5/65 ,  G11B5/64 ,  G11B5/84

CPC classification number: G11B5/653 ,  G11B5/64 ,  G11B5/65 ,  G11B5/84

Abstract: An apparatus includes a substrate and a magnetic layer coupled to the substrate. The magnetic layer includes an alloy that has magnetic hardness that is a function of the degree of chemical ordering of the alloy. The degree of chemical ordering of the alloy in a first portion of the magnetic layer is greater than the degree of chemical ordering of the alloy in a second portion of the magnetic layer, and the first portion of the magnetic layer is closer to the substrate than the second portion of the magnetic layer.

公开(公告)号：US20140272473A1

公开(公告)日：2014-09-18

申请号：US13802354

申请日：2013-03-13

Applicant: Seagate Technology LLC

Inventor： Xi Chen ,  Yingguo Peng ,  Jan-Ulrich Thiele ,  Ganping Ju ,  Thomas Roscamp

IPC: G11B5/716 ,  G11B5/68

CPC classification number: G11B5/716 ,  G11B5/65 ,  G11B5/66 ,  G11B5/68

Abstract: A magnetic stack includes a substrate and a magnetic recording layer disposed over the substrate. The magnetic recording layer comprises magnetic crystalline grains and a segregant disposed between grain boundaries of the crystalline grains. One or both of the magnetic crystalline grains and the segregant are doped with a rare earth or transition metal dopant in an amount that provides the magnetic recording layer with a magnetic damping value, α, between about 0.1 to about 1.

Abstract translation: 磁性堆叠包括衬底和设置在衬底上的磁记录层。 磁记录层包括磁晶粒和设置在晶粒的晶界之间的分离器。 磁性晶粒和分离器中的一个或两个掺杂有稀土或过渡金属掺杂剂，其量使磁记录层具有约0.1至约1之间的磁阻尼值α。

公开(公告)号：US10310182B2

公开(公告)日：2019-06-04

申请号：US14055773

申请日：2013-10-16

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Ganping Ju ,  Chubing Peng ,  Xiaobin Zhu ,  Yingguo Peng ,  Yukiko Kubota ,  Timothy J Klemmer ,  Jan-Ulrich Thiele ,  Michael A. Seigler ,  Werner Scholz ,  Kim Y. Lee ,  David S. Kuo ,  Koichi Wago

IPC: G02B6/122

Abstract: The embodiments disclose a stack feature of a stack configured to confine optical fields within and to a patterned plasmonic underlayer in the stack configured to guide light from a light source to regulate optical coupling.

公开(公告)号：US09916868B1

公开(公告)日：2018-03-13

申请号：US15229967

申请日：2016-08-05

Applicant: Seagate Technology LLC

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

IPC: G11B27/36 ,  G11B7/1263 ,  G11B5/024 ,  G11B5/09 ,  G11B7/1267 ,  G11B5/00

CPC classification number: G11B27/36 ,  G01R33/0325 ,  G11B5/024 ,  G11B5/09 ,  G11B5/4555 ,  G11B7/1263 ,  G11B7/1267 ,  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 determine an anisotropy parameter using the read signal. The apparatus can further comprise a Kerr sensor that generates a Kerr signal using the magnetic pattern.

公开(公告)号：US09672854B2

公开(公告)日：2017-06-06

申请号：US14068871

申请日：2013-10-31

Applicant: Seagate Technology LLC

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

IPC: G11B5/66 ,  G11B5/65 ,  G11B5/64 ,  G11B5/851 ,  G11B5/73

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.

公开(公告)号：US09443544B1

公开(公告)日：2016-09-13

申请号：US13965976

申请日：2013-08-13

Applicant: Seagate Technology LLC

Inventor： Yingguo Peng ,  Jan-Ulrich Thiele ,  Ganping Ju ,  Thomas Patrick Nolan ,  Yinfeng Ding ,  Alexander Qihong Wu

IPC: G11B5/66 ,  G11B5/73

CPC classification number: G11B5/73 ,  G11B5/66

Abstract: A magnetic stack includes multiple granular layers, at least one of the multiple granular layers is a magnetic layer that includes exchange coupled magnetic grains separated by a segregant having Ms greater than 100 emu/cc. Each of the multiple granular layers have anisotropic thermal conductivity.

公开(公告)号：US20150093598A1

公开(公告)日：2015-04-02

申请号：US14068871

申请日：2013-10-31

Applicant: Seagate Technology LLC

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

IPC: G11B5/66 ,  G11B5/851 ,  G11B5/64

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.

Abstract translation: 堆叠包括基板和磁记录层。 设置在基板和磁记录层之间的是MgO-Ti（ON）层。