公开(公告)号：US20060152864A1

公开(公告)日：2006-07-13

申请号：US11372302

申请日：2006-03-08

申请人： Takayoshi Ohtsu ,  Satoshi Shigematsu ,  Kouji Nishioka ,  Takao Imagawa ,  Kouji Kataoka ,  Masatoshi Arasawa ,  Norifumi Miyamoto

发明人： Takayoshi Ohtsu ,  Satoshi Shigematsu ,  Kouji Nishioka ,  Takao Imagawa ,  Kouji Kataoka ,  Masatoshi Arasawa ,  Norifumi Miyamoto

IPC分类号： G11B5/127 ,  G11B5/33

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/3116 ,  G11B5/3909 ,  G11B5/3932 ,  G11B5/3967 ,  G11B2005/3996

摘要： 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.

摘要翻译： 磁阻头包括具有夹在其间的非磁性中间膜的第一和第二自由磁性膜的自由磁性层，第一和第二自由磁性膜的各自的磁化方向是反平行的。 自由磁性层在磁道宽度方向上的长度为200nm以下，饱和磁通密度与第一自由磁性膜的膜厚的乘积与第二自由磁性膜的膜厚之差 在1〜3nmT的范围内。 通过这种结构，在200nm或更小的轨道宽度处，输出的变化和不对称性的变化大大降低。

公开(公告)号：US20060002040A1

公开(公告)日：2006-01-05

申请号：US11171910

申请日：2005-06-29

申请人： Kouichi Nishioka ,  Satoshi Shigematsu ,  Yasunari Tajima

发明人： Kouichi Nishioka ,  Satoshi Shigematsu ,  Yasunari Tajima

IPC分类号： G11B5/33 ,  G11B5/127

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3906 ,  G11B2005/3996

摘要： Exchange coupling energy between an anti-ferromagnetic layer and a first ferromagnetic layer, and an anti-ferromagnetic coupling energy between the first ferromagnetic layer and a second ferromagnetic layer by way of an Ru anti-ferromagnetic coupling layer of a spin valve device are increased thereby increasing the magnetoresistance ratio and decreasing the coercivity of the free layer of the spin valve film. In an MnPt anti-ferromagnetic bottom type synthetic ferri-type spin valve film in which an underlayer, an anti-ferromagnetic layer comprising MnPt, a first ferromagnetic layer comprising CoFe, an anti-ferromagnetic coupling layer comprising Ru, a second ferromagnetic layer comprising CoFe, an intermediate non-magnetic layer comprising Cu, a free layer comprising synthetic films of CoFe and NiFe and a protective layer are stacked over a substrate, the Fe composition X in CoFeX of the first ferromagnetic layer is set as about: 20

公开(公告)号：US06833981B2

公开(公告)日：2004-12-21

申请号：US10079427

申请日：2002-02-22

申请人： Shigekazu Suwabe ,  Shin Noguchi ,  Yasunari Tajima ,  Satoshi Shigematsu

发明人： Shigekazu Suwabe ,  Shin Noguchi ,  Yasunari Tajima ,  Satoshi Shigematsu

IPC分类号： G11B539

CPC分类号： B82Y10/00 ,  G11B5/3903

摘要： A spin valve magnetic head, providing on a substrate, a laminated structure that has an antiferromagnetic layer, fixation layer, non-magnetic layer and unconstraint layer, and having a first underlayer of Ta, a second underlayer of NiFeCr and a third underlayer of NiFe, which underlayers are interposed between the substrate and the laminated structure.

摘要翻译： 一种自旋阀磁头，在基板上提供具有反铁磁层，固定层，非磁性层和非约束层的层叠结构，并具有第一底层Ta，NiFeCr的第二底层和NiFe的第三底层 底层被夹在基板和叠层结构之间。