发明名称 |
Magnetic recording/reproducing method |
摘要 |
In a method for magnetically recording and reproducing signals in and from a magnetic recording medium via a thin film magnetic head, the recording medium has a magnetic layer of up to 0.5 mu m thick containing hexagonal ferromagnetic particles on a non-magnetic substrate, and the magnetic head includes a recording head whose gap adjacent portion is formed of a soft magnetic material having a saturation magnetic flux density of at least 0.7 T and a reproducing MR head. In one form, the magnetic layer has a surface roughness (Ra) of up to 5 nm, and a coercivity (Hc) of at least 1,100 Oe and a squareness ratio (S) of at least 0.70. In another form, the magnetic layer contains hexagonal ferrite and has a squareness ratio (S ORTHOGONAL ) of at least 0.70, and the magnetic head produces a reproduction output which is subject to zero-crossing detection without passing through a differential circuit. <IMAGE> <IMAGE> |
申请公布号 |
EP0940803(A3) |
申请公布日期 |
2000.03.01 |
申请号 |
EP19990108469 |
申请日期 |
1994.05.31 |
申请人 |
TDK CORPORATION |
发明人 |
KOGA, KEIJI;KAGOTANI, TSUNEO;NISHIZAWA, AKINORI;FUKUDA, KAZUMASA;SAKAI, MASANORI |
分类号 |
G11B5/00;G11B5/02;G11B5/09;G11B5/187;G11B5/31;G11B5/39;G11B5/70;G11B5/706;G11B5/74 |
主分类号 |
G11B5/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|