Invention Grant
- Patent Title: Magneto resistive head and magnetic recording apparatus
- Patent Title (中): 磁阻头和磁记录装置
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Application No.: US10660865Application Date: 2003-09-11
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Publication No.: US07031123B2Publication Date: 2006-04-18
- Inventor: Takayoshi Ohtsu , Satoshi Shigematsu , Kouji Nishioka , Takao Imagawa , Kouji Kataoka , Masatoshi Arasawa , Norifumi Miyamoto
- Applicant: Takayoshi Ohtsu , Satoshi Shigematsu , Kouji Nishioka , Takao Imagawa , Kouji Kataoka , Masatoshi Arasawa , Norifumi Miyamoto
- Applicant Address: JP Odawara
- Assignee: Hitachi Global Storage Technologies Japan, Ltd.
- Current Assignee: Hitachi Global Storage Technologies Japan, Ltd.
- Current Assignee Address: JP Odawara
- Agency: Townsend and Townsend and Crew LLP
- Priority: JP2002-267552 20020913
- Main IPC: G11B5/39
- IPC: G11B5/39
Abstract:
A magnetoresistive head comprises a free magnetic layer that has first and second free magnetic films sandwiching a non-magnetic intermediate film therebetween, the respective magnetizing directions of the first and the second free magnetic films are antiparallel. The length of the free magnetic layer in the direction of the track width is 200 nm or less, and a difference between a product of saturation magnetic flux density and a film thickness of the first free magnetic film, and that of the second free magnetic film is within a range from 1 to 3 nmT. By this structure, the variation of output and the variation of asymmetry is greatly decreased at a track width of 200 nm or less.
Public/Granted literature
- US20040052009A1 Magneto resistive head and magnetic recording apparatus Public/Granted day:2004-03-18
Information query
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