Title:
垂直磁気記録媒体及び磁気記録再生装置
Document Type and Number:
Japanese Patent JP6416041
Kind Code:
B2
Abstract:
A perpendicular magnetic recording medium includes a soft magnetic underlayer, an underlayer, an intermediate layer, and a perpendicular magnetic recording layer successively stacked on a nonmagnetic substrate. The soft magnetic underlayer includes a soft magnetic layer having an amorphous structure. The underlayer includes a first underlayer, and a second underlayer provided between the first underlayer and the intermediate layer. The first underlayer is made of a TiV alloy having an amorphous structure, and the second underlayer is made of an NiW alloy including at least one element selected from a group consisting of Co, Cu, Al, Cr, and Fe. The intermediate layer is made of Ru or an Ru alloy, and wherein the soft magnetic layer, the first underlayer, and the second underlayer are stacked in this order.
Inventors:
Xu
Kurokawa Gohei
Kurokawa Gohei
Application Number:
JP2015109506A
Publication Date:
October 31, 2018
Filing Date:
May 29, 2015
Export Citation:
Assignee:
SHOWA DENKO K.K.
International Classes:
G11B5/738
Domestic Patent References:
| JP2007184019A | ||||
| JP2015032326A | ||||
| JP2004227717A | ||||
| JP2011086356A | ||||
| JP2010129115A | ||||
| JP2016201159A |
Foreign References:
| WO2009028621A1 |
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Tadahiko Ito