Low noise magnetic head for high frequency recording

Details Low noise magnetic head for high frequency recording Low noise magnetic head for high frequency recording

1996-02-26

1998-08-11

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428693, 428900, 427128, 427131, 360113, 360126, G11B 5127

Patent

active

057925470

ABSTRACT:
A laminated pole structure for use in a low noise magnetic head suitable for high frequency signal operation is formed by interleaving a plurality of ferromagnetic layers and electrically insulating antiferromagnetic layers so as to form interface surfaces therebetween. External magnetic fields are applied as the interface surfaces are being formed for establishing exchange anisotropies with predetermined permanent exchange pinning directions in the ferromagnetic layers. The exchange anisotropies may be in the same or opposite directions, as defined by the external magnetic fields. In one embodiment, the pole structure has an open edge lamination, while in another embodiment the pole structure has a closed edge lamination. In still another embodiment, the antiferromagnetic layers include predetermined patterns of nonmagnetic material.

REFERENCES:
patent: 5465185 (1995-11-01), Heim et al.
patent: 5612098 (1997-03-01), Tan et al.

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