Thin film magnetic head having magnetic anisotropy with in-plane

Details Thin film magnetic head having magnetic anisotropy with in-plane Thin film magnetic head having magnetic anisotropy with in-plane

1991-09-26

1993-02-16

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Head

Core

G11B 5147

Patent

active

051876280

ABSTRACT:
A magnetic head of the invention comprises a substrate, upper and lower magnetic films forming a magnetic circuit on the substrate, the magnetic circuit having a narrow portion in width and forming a gap at the end of the magnetic circuit for interacting with a recording medium, and a coil surrounding the magnetic circuit and buried in an insulation layer between the upper and lower magnetic films. The magnetic head of the invention is characterized in that the magnetic films further comprise a magnetic anisotropy having components of an in-plane (parallel to the magnetic film surface) magnetic anisotropy Hp and a perpendicular (vertical to the magnetic film surface) magnetic anisotropy Hv, and the perpendicular magnetic anisotropy Hv is given to the magnetic film by anyone among utilization of an inverse magnetostriction effect, an induced magnetic anisotropy and a crystalline magnetic anisotropy.

REFERENCES:
patent: 5085935 (1992-02-01), Mallary

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