发明申请
- 专利标题： Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus
- 专利标题（中）： 垂直磁记录介质和磁记录/再现装置
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申请号： US10572780申请日： 2004-09-22
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公开(公告)号： US20070042227A1公开(公告)日： 2007-02-22
- 发明人: Takeshi Iwasaki , Soichi Oikawa , Futoshi Nakamura , Tomoyuki Maeda , Hiroshi Sakai , Akira Sakawaki , Kenji Shimizu
- 申请人： Takeshi Iwasaki , Soichi Oikawa , Futoshi Nakamura , Tomoyuki Maeda , Hiroshi Sakai , Akira Sakawaki , Kenji Shimizu
- 优先权： JP2003-333480 20030925
- 国际申请： PCT/JP04/14300 WO 20040922
- 主分类号： G11B5/66
- IPC分类号： G11B5/66
摘要：
To make possible high density recording by making the structure of the perpendicular magnetic recording layer finer. A perpendicular magnetic recording medium 10 includes at least a nonmagnetic under layer 2, a perpendicular magnetic layer 3, and a protective layer which are stacked on a nonmagnetic substrate 1, wherein the perpendicular magnetic layer includes ferromagnetic crystal grains and nonmagnetic crystal grain boundary regions, wherein the crystal grain boundary region includes at least two kinds of oxide.
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