Perpendicular magnetic head

Abstract

The perpendicular magnetic head is capable of solving the problem of pole-erasing and performing high density recording by a main magnetic pole. The perpendicular magnetic head comprises a write-head including a main magnetic pole, and the main magnetic pole is a magnetic thin film having magnetic anisotropy, in which a magnetizing direction is parallel to a recording surface of a recording medium.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments of the present invention will now be described by way of examples and with reference to the accompanying drawings, in which:

FIG. 1 is an explanation view of a main magnetic pole of the perpendicular magnetic head of a first embodiment;

FIG. 2A is a perspective view of a main magnetic pole of the perpendicular magnetic head of a second embodiment;

FIG. 2B is a sectional view of the main magnetic pole thereof;

FIG. 3A is a perspective view of a main magnetic pole of the perpendicular magnetic head of a third embodiment;

FIG. 3B is an end view of a pole end part the main magnetic pole thereof;

FIGS. 4A-4E are explanation views showing a process of producing the main magnetic pole of the third embodiment; and

FIG. 5 is a sectional view of the conventional perpendicular magnetic head.

Claims

1. A perpendicular magnetic head, comprising: a write-head including a main magnetic pole,wherein the main magnetic pole is a magnetic thin film having magnetic anisotropy, in which a magnetizing direction is parallel to a recording surface of a recording medium.

2. The perpendicular magnetic head according to claim 1, wherein the magnetic thin film is formed on a base layer having specific metal lattices and has the magnetic anisotropy perpendicular to a surface of the film.

3. The perpendicular magnetic head according to claim 1, wherein a magnetic field is perpendicularly applied to a surface of the magnetic thin film when the magnetic thin film is formed, so that the magnetic thin film has the magnetic anisotropy perpendicular to the surface thereof.

4. A perpendicular magnetic head, comprising: a write-head including a main magnetic pole,wherein an end face of a pole end part of the main magnetic pole and a surface of the main magnetic pole are coated with a multilayered magnetic film, which is formed on a base layer made of a soft magnetic material and magnetized in a direction perpendicular to a surface of the film.

5. The perpendicular magnetic head according to claim 4, wherein the multilayered magnetic film is formed by alternately layering magnetic layers, which have high magnetic flux density, and intermediate layers, and the outermost layer is the magnetic layer.

6. The perpendicular magnetic head according to claim 5, wherein the intermediate layer is made of a magnetic material, which is antiferromagnetic-coupled with the magnetic layer and whose magnetizing direction is opposite to the magnetizing direction of the magnetic layer.

7. A perpendicular magnetic head, comprising: a write-head including a main magnetic pole,wherein magnetic layers, which have high magnetic flux density, and intermediate layers are alternately layered on a bottom face and both side faces of a pole end part of the main magnetic pole.

8. The perpendicular magnetic head according to claim 7, wherein the intermediate layer is made of a magnetic material, which is antiferromagnetic-coupled with the magnetic layer and whose magnetizing direction is opposite to the magnetizing direction of the magnetic layer.