JPS58122609A - Vertical magnetization type magnetic head - Google Patents

Abstract

PURPOSE:To make the adhering state between a head and a medium stable, by closely adhering the medium to a main magnetic pole with a pad. CONSTITUTION:A button type head 1 is formed with the main magnetic pole 2 and a nonmagnetic member 3 supporting the main magnetic pole 2. A head 1 is fixed on a head supporting arm 4. Further, the pad 6 closely adhering the medium 5 on the main magnetic pole 2 is formed to the tip of an auxiliary magnetic pole 8 having a winding 9.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a perpendicular magnetization type magnetic head and aims at reducing the distance between the head and the medium and keeping it stable.

It has become clear that the perpendicular recording method, in which the magnetization vector in the medium is formed perpendicular to the medium surface, is suitable for high-density recording in principle, and there have been many experimental reports proving this. There is. Therefore, it can be said that the perpendicular recording method is highly likely to replace the current longitudinal recording method as a high-density magnetic recording method.

Already, as perpendicular recording media and heads, a Co-Cr alloy thin film with high perpendicular magnetic anisotropy and a first
As shown in the figure, a so-called perpendicular magnetization type magnetism consisting of a main pole A and an auxiliary pole B facing each other with a medium C in between has been proposed, and the combination of the two shows good recording density characteristics. It is known.

However, in order to achieve high-density recording and playback with perpendicular recording, it is necessary to keep the distance between the media small and stable, and no practical proposals have been made that take this point into account. has not been done yet.

The present invention aims to achieve the above-mentioned objects for flexible/pull media, and FIG. 2 shows the structure of an embodiment of the present invention.

In FIG. 2, 1 is a button-shaped head consisting of a main magnetic pole 2 and a non-magnetic material 3 supporting the main magnetic pole 2, and this head 1 is fixed on a head support arm 4. On the other hand, the medium 5 is brought into close contact with the main magnetic pole 2 by placing pads 6 across the medium 6 and pressing them with springs 7. 8 is an auxiliary magnetic pole, and 9 is a winding.

FIG. 3 shows measurements of the head-medium distance in such a structure. Here, a button cedar fixed dummy head having a spherical contact surface with a radius of curvature of 60 mm and a pad to bring the Co--Cr vertical film medium into close contact with the dummy head are used.

From the same figure, within the area of diameter I III, 0.3μ
It can be seen that a distance of less than m can be stably realized.

On the other hand, in order to form an auxiliary magnetic pole within the pad portion, the following configuration is possible.

A structure with a pad at the tip of the auxiliary magnetic pole.

As shown in FIG. 4, a pad 6 is provided on the tip end surface of an auxiliary magnetic pole 8 having a winding 9 to bring the medium 6 into close contact with the main magnetic pole part 2.

Figure 6 shows the magnitude of the magnetic field created by the auxiliary magnetic pole 8 on its central axis, calculated with respect to the distance normalized by the core width tc, which is 80% at a point about 16% away from the core width. It has been shown that the Therefore, also in the above structure, the sum of the pad thickness t and the medium thickness tm needs to be 1Q to 20% or less of the auxiliary pole core width.

(B) A structure in which the auxiliary magnetic pole is embedded within the pad.

As shown in FIG. 6, in the center hole of the annular pad 6',
An auxiliary magnetic pole 8 is arranged.

Although this structure is slightly more complicated than (5), it has the feature that the auxiliary magnetic pole can be placed close to the main magnetic pole.

Although the above embodiment is of an auxiliary magnetic pole excitation structure, the present invention can also be applied to a main magnetic pole excitation type. That is, the seventh
As shown in the figure, a magnetic prosin 10 such as ferrite is closely attached to the main magnetic pole 2, and a winding 9 is applied to the main magnetic pole 2.
Configure as a pole.

At this time, the pad 6 may be provided on the lower surface of the support member 11.

As described above, according to the present invention, it is possible to achieve stable adhesion between the head and the medium, which is essential for high-density magnetic recording.Furthermore, using a soft pad improves the durability of the medium. It is also desirable from above. Further, since an auxiliary magnetic pole excitation type can be adopted for the head structure, there is an advantage that highly efficient recording and reproduction can be performed.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the basic structure of a conventional perpendicular magnetization type magnetic head, Fig. 2 is a side view of a perpendicular magnetization type magnetic head according to an embodiment of the present invention, and Fig. 3 is a diagram showing the space between the head and the medium of the magnetic head. FIG. 4 is a partially enlarged side view of FIG. 2, FIG. 5 is a diagram showing the magnetic field strength of the auxiliary magnetic pole of the magnetic head versus the distance from its tip, FIG. 7 are side views of other embodiments of the present invention. 1...Head, 2...Main magnetic pole, 3.
...Nonmagnetic material, 4...Head support arm, 5...Medium, 6, 6'...Pad, 7...Spring, 8...Auxiliary magnetic pole, 9.
...Winding, 10...Magnetic block, 11
...Supporting member. Name of agent: Patent attorney Toshio Nakao and 1 other person11
Figure 2 Figure 3rI! j Figure 4 Figure 5

Claims (1)

[Scope of Claims] (1) A main magnetic pole portion fixed on a head support arm, an auxiliary magnetic pole portion having a winding arranged opposite to the main magnetic pole portion or near the main magnetic pole portion; A perpendicular magnetization type magnetic head comprising a butt section that clamps a medium together with a main magnetic pole section, and a biasing means that biases the butt section to bring the medium into close contact with the main magnetic pole. (2. In the perpendicular magnetization type magnetic head according to claim 1, an auxiliary magnetic pole portion is disposed opposite to the main magnetic pole portion,
A perpendicular magnetization type magnetic head comprising a butt part provided on a surface of the auxiliary magnetic pole part facing the main magnetic pole part (3) In the perpendicular magnetization type head according to claim 1, the butt part A perpendicular magnetization type magnetic head 0 is obtained by arranging an annular butt part and arranging an auxiliary magnetic pole part in the center hole of the annular butt part.