-
公开(公告)号：US20150117166A1
公开(公告)日：2015-04-30
申请号：US14503503
申请日：2014-10-01
Applicant: SHOWA DENKO K.K.
Inventor： Lei ZHANG , Tetsuya KANBE , Yuji MURAKAMI , Kazuya NIWA
IPC: G11B5/73
CPC classification number: G11B5/7325 , G11B5/65 , G11B11/10584 , G11B2005/0021
Abstract: A magnetic recording medium includes a substrate, a magnetic layer including an alloy having an L10 type crystal structure as a main component thereof, and a plurality of underlayers arranged between the substrate and the magnetic layer. The plurality of underlayers include at least one crystalline underlayer which has a (100) orientation, and includes W as a main component thereof and one or more kinds of elements selected from a group consisting of Fe, Ni, Co, Hf, Zr, Y, Be, Ce, La, and Sc.
Abstract translation: 磁记录介质包括基板，包括具有L10型晶体结构的合金作为其主要成分的磁性层以及布置在基板和磁性层之间的多个底层。 多个底层包括至少一个具有（100）取向的晶体底层，并且包括W作为其主要成分，以及选自Fe，Ni，Co，Hf，Zr，Y中的一种或多种元素 ，Be，Ce，La和Sc。
-
公开(公告)号：US20150036242A1
公开(公告)日：2015-02-05
申请号：US14333617
申请日：2014-07-17
Applicant: SHOWA DENKO K.K.
Inventor： Lei ZHANG , Tetsuya KANBE , Yuji MURAKAMI , Kazuya NIWA
IPC: G11B5/73
CPC classification number: G11B5/7325 , G11B5/65
Abstract: A magnetic recording medium includes a substrate, a magnetic layer including an alloy having a L10 type crystal structure as a main component thereof, and a plurality of underlayers arranged between the substrate and the magnetic layer. The plurality of underlayers include a first underlayer including two or more elements selected from a group consisting of Ta, Nb, Ti, and V, and one or more elements selected from a group consisting of W and Mo, and a second underlayer including MgO.
Abstract translation: 磁记录介质包括基板，包括具有L10型晶体结构的合金作为其主要成分的磁性层以及布置在基板和磁性层之间的多个底层。 多个底层包括包含选自Ta，Nb，Ti和V中的两种或更多种元素的第一底层和选自W和Mo的一种或多种元素，以及包含MgO的第二底层。
-
公开(公告)号：US20140308542A1
公开(公告)日：2014-10-16
申请号：US14220332
申请日：2014-03-20
Applicant: Showa Denko K.K.
Inventor： Lei ZHANG , Tetsuya KANBE , Yuji MURAKAMI , Kazuya NIWA
IPC: G11B5/73
CPC classification number: G11B5/73 , G11B5/7325
Abstract: A magnetic recording medium includes a substrate, multiple underlayers formed on the substrate, and a magnetic layer formed on the multiple underlayers. A main component of the magnetic layer is an alloy having a L10 structure. At least one of the multiple underlayers is a crystalline underlayer containing W. The W is a main component of the crystalline underlayer. The crystalline underlayer further contains 1 mol % or more to 20 mol % or less of one or more kinds of elements selected from B, Si, and C. A barrier layer including a material having a NaCl structure is formed between the crystalline underlayer and the magnetic layer.
Abstract translation: 磁记录介质包括基板，形成在基板上的多个底层，以及形成在多个底层上的磁性层。 磁性层的主要成分是具有L10结构的合金。 多个底层中的至少一个是含有W的晶体底层.W是晶体底层的主要成分。 结晶性底层还含有1mol％以上至20mol％以下的选自B，Si，C中的1种以上的元素。在结晶性底层和 磁性层。
-
24.发明申请公开(公告)号：US20140064047A1
公开(公告)日：2014-03-06
申请号：US13972041
申请日：2013-08-21
Applicant: SHOWA DENKO K.K.
Inventor： Kazuya NIWA , Tetsuya KANBE , Yuji MURAKAMI , Lei ZHANG
CPC classification number: G11B13/08 , G11B5/65 , G11B5/73 , G11B5/7325 , G11B2005/0024
Abstract: A magnetic recording medium of the present invention includes an under layer formed on a substrate, and a magnetic layer, formed on the under layer, which contains an alloy having an L10-type crystal structure as a main component. The under layer includes, in order from the substrate side, a first under layer with a lattice constant a of 2.87 Å≦a
Abstract translation: 本发明的磁记录介质包括形成在基板上的底层和形成在下层上的磁性层，其含有具有L10型晶体结构的合金作为主要成分。 底层按照从衬底侧开始的顺序为具有晶格常数a为a <3.04的第一底层，具有晶格常数a为3.04的BCC结构的第二下层，a <3.18 Å，具有晶格常数a为3.18Å@ 3.31的BCC结构的第三下层，以及具有NaCl型晶体结构的上下层。 第一底层具有B2结构，或具有含有Cr作为主要成分的BCC结构。 在本发明的磁记录介质中，使用热辅助磁记录型或微波辅助磁记录型来记录信息。
-
25.发明申请公开(公告)号：US20210201947A1
公开(公告)日：2021-07-01
申请号：US17104504
申请日：2020-11-25
Applicant: SHOWA DENKO K.K.
Inventor： Takayuki FUKUSHIMA , Lei ZHANG , Chen XU , Hisato SHIBATA , Takehiro YAMAGUCHI , Hiroshi KOYANAGI , Yuji UMEMOTO
Abstract: The present invention relates to a magnetic recording medium including a substrate; an underlayer laminated upon the substrate; and a magnetic layer laminated upon the underlayer, wherein the underlayer includes a first underlayer containing a compound represented by a following general formula: MgO(1-X), where X is within a range of 0.07 to 0.25, the magnetic layer includes a first magnetic layer containing an alloy having a L10 structure, and the alloy having the L10 structure includes B, and the first underlayer is in contact with the first magnetic layer.
-
Patent Agency Ranking
公开(公告)号：US20190392860A1
公开(公告)日：2019-12-26
申请号：US16433377
申请日：2019-06-06
Applicant: SHOWA DENKO K.K.
Inventor： Lei ZHANG , Chen XU , Takayuki FUKUSHIMA , Kazuya NIWA , Tetsuya KANBE , Hisato SHIBATA , Takehiro YAMAGUCHI , Tomoo SHIGE
Abstract: A heat-assisted magnetic recording medium includes: a substrate; an underlayer; and a magnetic layer including an alloy having an L10 structure, wherein the underlayer includes, from the substrate side, a bcc underlayer including a substance having a bcc structure, a first oxide layer that is in contact with the bcc underlayer, and a second oxide layer that is in contact with the magnetic layer. The bcc underlayer, the first oxide layer, and the second oxide layer are stacked in the recited order. The first oxide layer and the second oxide layer include magnesium oxide, and the second oxide layer further includes one or more compounds selected from the group consisting of vanadium oxide, vanadium nitride, and vanadium carbide.
-
公开(公告)号：US20180261245A1
公开(公告)日：2018-09-13
申请号：US15885013
申请日：2018-01-31
Applicant: SHOWA DENKO K.K.
Inventor： Kazuya NIWA , Tetsuya KANBE , Yuji MURAKAMI , Lei ZHANG , Hisato SHIBATA , Takayuki FUKUSHIMA , Satoru NAKAJIMA , Takehiro YAMAGUCHI
CPC classification number: G11B5/656 , G11B5/012 , G11B5/1875 , G11B5/3133 , G11B5/3912 , G11B5/714 , G11B5/73 , G11B5/7325 , G11B5/746 , G11B2005/0021
Abstract: The invention provides a magnetic recording medium with an excellent signal-to-noise ratio during reading by reducing the noise produced during writing of data onto the magnetic recording medium, and increasing the signal level. The assisted magnetic recording medium according to one embodiment comprising a substrate, a base layer, and a magnetic layer composed mainly of an alloy with an L10-type crystal structure, the assisted magnetic recording medium having a pinning layer in contact with the magnetic layer, and the pinning layer including Co or an alloy composed mainly of Co.
-
公开(公告)号：US20180211688A1
公开(公告)日：2018-07-26
申请号：US15859973
申请日：2018-01-02
Applicant: SHOWA DENKO K.K.
Inventor： Takayuki FUKUSHIMA , Haruhisa OHASHI , Lei ZHANG , Yuji MURAKAMI , Hisato SHIBATA , Takehiro YAMAGUCHI , Tetsuya KANBE
IPC: G11B5/65
Abstract: A magnetic recording medium includes: a substrate; a first underlayer; a second underlayer; and a magnetic layer including an alloy having a L10 type crystal structure with a (001) orientation. The substrate, the first underlayer, the second underlayer, and the magnetic layer are stacked in this order. The first underlayer is a crystalline layer that includes Mo as a main component. The second underlayer is a crystalline layer that includes a material containing Mo as a main component and that includes an oxide. The content of the oxide in the second underlayer is in a range of from 2 mol % to 30 mol %. The oxide is an oxide of one or more kinds of elements selected from a group consisting of Cr, Mo, Nb, Ta, V, and W.
-
公开(公告)号：US20180204591A1
公开(公告)日：2018-07-19
申请号：US15850226
申请日：2017-12-21
Applicant: SHOWA DENKO K.K.
Inventor： Takayuki FUKUSHIMA , Haruhisa OHASHI , Lei ZHANG , Yuji MURAKAMI , Hisato SHIBATA , Takehiro YAMAGUCHI , Tetsuya KANBE
Abstract: A magnetic recording medium includes: a substrate; a first underlayer; a second underlayer; and a magnetic layer including an alloy having a L10 type crystal structure with a (001) orientation. The substrate, the first underlayer the second underlayer, and the magnetic layer are stacked in this order. The first underlayer is a crystalline layer that includes W as a main component. The second underlayer is a crystalline layer that includes a material containing W as a main component and that includes an oxide. The content of the oxide in the second underlayer is in a range of from 2 mol % to 30 mol %. The oxide is an oxide of one or more kinds of elements selected from a group consisting of Cr, Mo, Nb, Ta, V, and W.
-
公开(公告)号：US20180182421A1
公开(公告)日：2018-06-28
申请号：US15841930
申请日：2017-12-14
Applicant: SHOWA DENKO K.K.
Inventor： Takayuki FUKUSHIMA , Kazuya NIWA , Lei ZHANG , Yuji MURAKAMI , Hisato SHIBATA , Takehiro YAMAGUCHI , Tetsuya KANBE
IPC: G11B5/667 , G11B11/105 , G11B5/65 , G11B5/73
CPC classification number: G11B5/667 , G11B5/65 , G11B5/7325 , G11B5/851 , G11B11/10589
Abstract: A magnetic recording medium includes a substrate, an underlayer, and a magnetic layer including an alloy having a L10 type crystal structure with a (001) orientation, wherein the substrate, the underlayer, and the magnetic layer are stacked in this order, the underlayer includes a first underlayer, the first underlayer is a crystalline layer that includes a material containing W as a main component and a nitride whose content ranges from 1 mol % to 80 mol %, and the nitride includes one or more elements selected from a group consisting of Al, B, Si, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W.
-
-
-
-
-
-
-
-
-
Search Results
30
records
(took 0.024 seconds)
