公开(公告)号：EP1653451B1

公开(公告)日：2008-10-15

申请号：EP05107114.0

申请日：2005-08-02

申请人： Hitachi Global Storage Technologies B. V.

发明人： Takahashi, Yoshio ,  Nakamura, Atushi ,  Hosoe, Yuzuru

IPC分类号： G11B5/64

CPC分类号： G11B5/65

公开(公告)号：EP1653451A1

公开(公告)日：2006-05-03

申请号：EP05107114.0

申请日：2005-08-02

申请人： Hitachi Global Storage Technologies B. V.

发明人： Takahashi, Yoshio ,  Nakamura, Atushi ,  Hosoe, Yuzuru

IPC分类号： G11B5/64

CPC分类号： G11B5/65

摘要： To ensure that a perpendicular magnetic recording medium having a granular magnetic recording layer made of CoCrPt alloy and Si oxide provides both high SNR and thermal stability. A substantially amorphous grain boundary layer of a magnetic recording layer made of CoCrPt alloy and Si oxide contains a ferromagnetic element in a concentration from 30at.% to 50at.% or more preferably from 35at.% to 47at.% so that intergrain exchange interaction takes place moderately. As a consequence, SNR of 18 dB or more and thermal stability of 3%/decade or less are achieved.

摘要翻译： 为了确保具有由CoCrPt合金和Si氧化物制成的粒状磁记录层的垂直磁记录介质提供高SNR和热稳定性。 由CoCrPt合金和Si氧化物制成的磁记录层的基本非晶界面层含有浓度为30at％至50at。％或更优选为35at。至47at。％的铁磁性元素，因此晶间相互作用需要 适度放置 因此，实现了18dB以上的SNR和3％/ 10以下的热稳定性。