Invention Grant
- Patent Title: Magnetic recording medium having at least two coupled magnetic layers, magnetic storage apparatus and recording method
- Patent Title (中): 具有至少两个耦合磁性层的磁记录介质，磁存储装置和记录方法
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Application No.: US10850988Application Date: 2004-05-21
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Publication No.: US07271984B2Publication Date: 2007-09-18
- Inventor: Hisashi Umeda , Iwao Okamoto
- Applicant: Hisashi Umeda , Iwao Okamoto
- Applicant Address: JP Kawasaki
- Assignee: Fujitsu Limited
- Current Assignee: Fujitsu Limited
- Current Assignee Address: JP Kawasaki
- Agency: Greer, Burns & Crain, Ltd.
- Priority: JP2003-314400 20030905
- Main IPC: G11B5/66
- IPC: G11B5/66 ; G11B5/673
Abstract:
A magnetic recording medium is provided with a first magnetic layer, a nonmagnetic coupling layer provided on the first magnetic layer, and a second magnetic layer provided on the nonmagnetic coupling layer. The first and second magnetic layers are exchange-coupled, and have magnetization directions which are mutually parallel in a state where no external magnetic field is applied thereto, and the first magnetic layer switches the magnetization direction thereof before the second magnetic layer in response to a recording magnetic field which switches the magnetization directions of the first and second magnetic layers.
Public/Granted literature
- US20050053803A1 Magnetic recording medium, magnetic storage apparatus and recording method Public/Granted day:2005-03-10
Information query
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