公开(公告)号：EP1555655A4

公开(公告)日：2006-02-08

申请号：EP02808023

申请日：2002-10-17

申请人： FUJITSU LTD

发明人： TAKESHITA HIROTO ,  MAEDA MAKI ,  UZUMAKI TAKUYA

IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/64 ,  G11B5/66 ,  G11B5/667 ,  G11B5/673 ,  G11B5/738

CPC分类号： G11B5/66 ,  G11B5/012 ,  G11B5/656 ,  G11B2005/0029 ,  Y10T428/24975

摘要： A vertical magnetic recording medium, wherein an auxiliary magnetic layer (37) is formed over a soft magnetic lined layer (38) spreading on the front surface of a substrate (31), a recording magnetic layer (36) is formed on the auxiliary magnetic layer (37) having a magnetization easy axis in a vertical direction orthogonal to the front surface of the substrate (31), magnetization is intensified on the recording magnetic layer (36) in the vertical direction orthogonal to the front surface of the substrate (31), whereby, by the auxiliary magnetic layer (37), a recording magnetic field can be intensified more in the vertical direction.

公开(公告)号：EP1560203A4

公开(公告)日：2005-10-19

申请号：EP03705362

申请日：2003-02-20

申请人： FUJITSU LTD

发明人： INAMURA RYOSAKU ,  TAKESHITA HIROTO ,  SUGIMOTO TOSHIO ,  SHIMODA KAZUMASA ,  OSHIMA TAKENORI ,  MAEDA MAKI ,  UZUMAKI TAKUYA ,  TANAKA ATSUSHI

IPC分类号： B32B1/00 ,  G11B5/64 ,  G11B5/65 ,  G11B5/667 ,  G11B5/73

CPC分类号： B32B1/00 ,  G11B5/65 ,  G11B5/667 ,  G11B5/7325

摘要： A nonmagnetic second orientation control layer (37) spreading on the surface of a magnetic first orientation control layer (36) is composed of crystal grains contiguous to each other. A recording magnetic layer (38) spreading on the surface of the second orientation control layer (37) is composed of crystal grains growing from individual crystal grains of the second orientation control layer (37). Crystal orientation of the recording magnetic layer (38) is arranged sufficiently through action of the first and second orientation control layers (36, 37). Crystal orientation can be controlled surely by the recording magnetic layer (38) as compared with a case where only the nonmagnetic second orientation control layer (37) having the same film thickness is employed. Furthermore, film thickness of the second orientation control layer (37) can be reduced through action of the first orientation control layer (36). Sufficient orientation can be established in the recording magnetic layer (38) regardless of a reduction in the film thickness of the second orientation control layer (37) and high electromagnetic conversion characteristics can be attained.

摘要翻译： 铺展在磁性第一取向控制层（36）表面上的非磁性第二取向控制层（37）由彼此相邻的晶粒组成。 铺展在第二取向控制层（37）表面上的记录磁性层（38）由从第二取向控制层（37）的各个晶粒生长的晶粒构成。 记录磁性层（38）的晶体取向通过第一和第二取向控制层（36,37）的作用充分地设置。 与仅使用具有相同膜厚度的非磁性第二取向控制层（37）的情况相比，通过记录磁性层（38）可以可靠地控制晶体取向。 此外，第二取向控制层（37）的膜厚可以通过第一取向控制层（36）的作用而减小。 无论第二取向控制层（37）的膜厚减小如何，都可以在记录磁性层（38）中建立足够的取向，并且可以获得高电磁转换特性。