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公开(公告)号：US20230178106A1
公开(公告)日：2023-06-08
申请号：US17554341
申请日：2021-12-17
摘要： A magnetic stack includes a substrate and a soft magnetic underlayer deposited on a top surface of the substrate. A heat sink layer is disposed on top of the soft magnetic underlayer, and an interlayer is deposited on top of the heat sink layer. A non-magnetic seed layer is deposited on top of the interlayer. A magnetic recording structure which includes more than one magnetic recording layer is deposited on the top surface of the non-magnetic seed layer.
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公开(公告)号：US10438614B1
公开(公告)日：2019-10-08
申请号：US15484383
申请日：2017-04-11
发明人： Kangkang Wang , Ganping Ju , Edward Charles Gage
IPC分类号： G11B5/245 , G11B5/024 , H01F13/00 , H01F6/06 , B23K26/00 , B23K26/082 , B23K26/08 , G11B5/00
摘要： An apparatus comprises a magnet housing dimensioned to receive a heat-assisted magnetic recording (HAMR) medium or a hard disk drive comprising at least one HAMR medium. A degausser is disposed in the magnet housing and is configured to generate at least one field sufficient to erase the HAMR medium, where the HAMR medium has a coercivity of between about 20 and 100 kOe at room temperature.
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3.发明授权公开(公告)号：US10006884B1
公开(公告)日：2018-06-26
申请号：US14822103
申请日：2015-08-10
发明人： Ganping Ju , Jason L Presseky , Roy W. Chantrell , Xiaowei Wu , Xi Chen , Xiaobin Zhu , Yingguo Peng
CPC分类号： G01N27/80 , G01K7/00 , G03G5/16 , G06F17/18 , G11B11/10591 , G11B2005/0021 , H01F41/304 , H01L37/00 , H01L37/04
摘要： 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.
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公开(公告)号：US09799363B2
公开(公告)日：2017-10-24
申请号：US13802354
申请日：2013-03-13
发明人： Xi Chen , Yingguo Peng , Jan-Ulrich Thiele , Ganping Ju , Thomas Roscamp
摘要： 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.
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5.发明授权公开(公告)号：US09689065B2
公开(公告)日：2017-06-27
申请号：US14577641
申请日：2014-12-19
发明人： Jingsheng Chen , Kaifeng Dong , Ganping Ju , Yingguo Peng
CPC分类号： C23C14/06 , C23C14/0641 , C23C14/083 , C23C14/165 , C23C14/352 , G11B5/65 , G11B5/7325
摘要： 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.
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公开(公告)号：US09685183B2
公开(公告)日：2017-06-20
申请号：US14451779
申请日：2014-08-05
发明人： Yingguo Peng , Xiaowei Wu , Ganping Ju , Bin Lu
摘要： 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.
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7.发明申请DAMPING CONTROLLED COMPOSITE MAGNETIC MEDIA FOR HEAT ASSISTED MAGNETIC RECORDING 有权用于热辅助磁记录的阻尼控制复合磁介质公开(公告)号：US20140272473A1
公开(公告)日：2014-09-18
申请号：US13802354
申请日：2013-03-13
发明人： Xi Chen , Yingguo Peng , Jan-Ulrich Thiele , Ganping Ju , Thomas Roscamp
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US11763845B2
公开(公告)日：2023-09-19
申请号：US17554341
申请日：2021-12-17
CPC分类号： G11B5/716 , G11B5/657 , G11B5/7369 , G11B5/7379
摘要： A magnetic stack includes a substrate and a soft magnetic underlayer deposited on a top surface of the substrate. A heat sink layer is disposed on top of the soft magnetic underlayer, and an interlayer is deposited on top of the heat sink layer. A non-magnetic seed layer is deposited on top of the interlayer. A magnetic recording structure which includes more than one magnetic recording layer is deposited on the top surface of the non-magnetic seed layer.
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公开(公告)号：US10310182B2
公开(公告)日：2019-06-04
申请号：US14055773
申请日：2013-10-16
发明人： 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分类号： G02B6/122
摘要： 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.
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公开(公告)号：US10249335B2
公开(公告)日：2019-04-02
申请号：US15713023
申请日：2017-09-22
发明人： Randall Victora , Zengyuan Liu , Pin-wei Huang , Ganping Ju , Jan-Ulrich Thiele
摘要： A heat-assisted magnetic recording media structure with exchange-coupled composite layer structure may be utilized in a data storage device. The heat-assisted magnetic recording disk structure can have a FePt-based layer as a storage layer and a FePt-based or a CoPt-based magnetic layer with higher Curie temperature as a write layer. The interface between the write layer and the storage layer may be separated by an exchange control layer. The composite structure can be optimized to reduce jitter for high density data storage by tuning the exchange coupling between the write layer and storage layer.
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