公开(公告)号：US20130194901A1

公开(公告)日：2013-08-01

申请号：US13749934

申请日：2013-01-25

Applicant: SHOWA DENKO K.K.

Inventor： Tetsuya KANBE ,  Atsushi HASHIMOTO ,  Takayuki FUKUSHIMA

IPC: G11B5/73

CPC classification number: G11B5/7325 ,  G11B5/65

Abstract: The heat-assisted magnetic recording medium of the present invention has a substrate, an under layer formed on the substrate, and a magnetic layer formed on the under layer, in which the magnetic layer includes an alloy having a L10 structure as a principle component, and the under layer is constituted by a first under layer made of an amorphous alloy or an alloy having a microcrystalline structure, a second under layer made of Cr or an alloy which contains Cr as a principle component and has a BCC structure, a third under layer made of a metal or an alloy having a BCC structure with a lattice constant of 2.98 Å or more, and a fourth under layer made of MgO.

Abstract translation: 本发明的热辅助磁记录介质具有基板，形成在基板上的下层和形成在下层上的磁性层，其中磁性层包括具有L10结构的合金作为主要成分， 底层由非晶合金或具有微晶结构的合金制成的第一下层，由Cr制成的第二下层或含有Cr作为主要成分并具有BCC结构的合金构成，第三下面 具有晶格常数为2.98以上的BCC结构的金属或合金制成的层和由MgO构成的第四下层。

公开(公告)号：US20200005823A1

公开(公告)日：2020-01-02

申请号：US16448187

申请日：2019-06-21

Applicant: SHOWA DENKO K.K. ,  TOHOKU UNIVERSITY

Inventor： Shin SAITO ,  Takayuki FUKUSHIMA ,  Lei ZHANG ,  Hisato SHIBATA ,  Takehiro YAMAGUCHI ,  Chen XU ,  Tetsuya KANBE ,  Tomoo SHIGE ,  Kazuya NIWA ,  Atsushi HASHIMOTO

IPC: G11B5/73

Abstract: A heat-assisted magnetic recording medium includes: a substrate; an underlayer; and a magnetic layer including an alloy having an L10 structure. The substrate, the underlayer, and the magnetic layer are stacked in the recited order. The underlayer includes a first underlayer. The first underlayer includes magnesium oxide and one or more compounds selected from the group consisting of vanadium oxide, zinc oxide, tin oxide, vanadium nitride, and vanadium carbide, and a total content of the one or more compounds is in a range of 45 mol % to 70 mol %.