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Spin bulb magnetoresistance effect head and compound magnetic head using it and magnetic recording medium drive unit

A technology of magnetoresistive magnetic head and spin valve, applied in magnetic recording, magnetic recording head, manufacturing magnetic flux sensitive magnetic head, etc., can solve the problems of leakage of magnetic data, loss of symmetry of waveform, bad and other problems

Inactive Publication Date: 2002-06-05
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] That is, first, there is a case where the leakage of the static magnetic field from the hard ferromagnetic layer has a bad influence on the magnetic data recorded on the magnetic recording medium
Second, there are cases where the static magnetic field leakage from the hard ferromagnetic layer also exerts an influence on the free magnetic layer, so that the reproduced waveform loses symmetry

Method used

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  • Spin bulb magnetoresistance effect head and compound magnetic head using it and magnetic recording medium drive unit
  • Spin bulb magnetoresistance effect head and compound magnetic head using it and magnetic recording medium drive unit
  • Spin bulb magnetoresistance effect head and compound magnetic head using it and magnetic recording medium drive unit

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Embodiment Construction

[0046] The best way to carry out the invention

[0047] Refer below Figure 5 A first embodiment of the present invention will be described. Figure 5 is a sectional view of the main part of the SVMR head 10 according to the first embodiment of the present invention. This embodiment presents an example of using an antiferromagnetic layer at the termination portion of the SVMR head of the present invention, whereby the magnetization of the free magnetic layer is generated by the exchange combined magnetic field from the antiferromagnetic layer.

[0048] The SVMR element part that forms the body of the SVMR magnetic head 10 includes a bottom layer 12, a hard ferromagnetic layer 13, an antiparallel coupling intermediate layer 14, a pinned magnetic layer 15, a non-magnetic layer 16 on an insulating aluminum or ceramic substrate 11, and a free magnetic layer 17 . The layers are stacked from the bottom in the stated order.

[0049] The hard ferromagnetic layer 13 is provided suc...

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Abstract

A spin bulb magnetoresistance effect head using a hard ferromagnetic layer and a magnetic recording medium drive unit using it. Specifically, a spin bulb magnetoresistance effect head which includes at least a free magnetic layer, a non-magnetic metal layer, a fixed magnetic layer, an anti-parallel coupling intermediate layer and a hard ferromagnetic layer and which use the anti-parallel coupling intermediate layer to set the magnetizing direction of the fixed magnetic layer and that of the hard ferromagnetic layer anti-parallel; and a magnetic recording medium drive unit using the head.

Description

technical field [0001] The present invention relates to a spin-valve magneto-resistive head, more precisely, to a spin-valve magneto-resistive head that uses a hard ferromagnetic layer to fix the magnetic orientation of a pinned magnetic layer, and to a magnetic recording medium drive device having such a spin valve magnetoresistive head mounted thereon. Background technique [0002] Currently, an anisotropic magnetoresistive (AMR) element is most often mounted on a magnetic recording medium drive device, such as a hard disk drive (HDD). However, with the increase in recording density, a movement to put into use a spin valve magnetoresistive type magnetic head (subsequently referred to as an SVMR head) using a more sensitive spin valve magnetoresistive (SVMR) element is in full swing, and SVMR heads have already started to be manufactured as products. [0003] According to a general classification, there are conventionally two kinds of SVMR heads, namely, one that uses an ...

Claims

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Application Information

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IPC IPC(8): G11B5/39
CPCB82Y10/00G11B5/3967B82Y25/00G11B5/3903G11B2005/3996G11B5/399G11B5/3906G11B5/398
Inventor 野间贤二金井均兼淳一青岛贤一
Owner FUJITSU LTD