JPH0156443B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head for perpendicular magnetization recording and reproduction.

Conventionally, as shown in FIG. 1, a magnetic head that performs recording and reproduction using a perpendicular magnetization recording medium has a magnetic thin film 1-1 and a magnetic material 1-3 on both sides with a perpendicular magnetization recording medium 1-2 in between. It is thought that the recording/reproducing efficiency is better if the recording/reproducing windings 1-4 are arranged, but the thickness of the substrate on which the recording medium is attached is thicker, as in fixed disk magnetic recording devices. In this case, magnetic thin film 1-1 and magnetic material 1-
Since the interaction of 3 is weakened, a magnetic head that can perform recording and reproduction from only one side of the recording medium is required. For this purpose, a magnetic head that performs recording and reproducing from one side of a perpendicularly magnetized recording medium has been considered, as shown in Figure 2, but this is based on a substrate 2-2 on which a magnetic thin film 2-1 is attached. Winding wire 2-3 for
The magnetic thin film 2-1 and the winding 2-
3 is large and magnetic flux leaks from the magnetic thin film 2-1, resulting in poor reproduction efficiency.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic head that efficiently records and reproduces data from only one side of a perpendicularly magnetized recording medium. Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 3 shows the basic structure of the perpendicular magnetization recording/reproducing head of the present invention. FIGS. 3 2 and 3 are views seen from directions a and b in FIG. 3 1, respectively. Arrow 3-13 in FIG. 3 indicates the traveling direction of the perpendicular magnetization recording medium. A magnetic thin film 3-1 having soft magnetic properties such as permalloy or an amorphous magnetic alloy and a magnetic material 3-9 having soft magnetic properties are combined at the part 3-2 to form a magnetic path, and the first layer conductor The thin film 3-3 and the second layer conductive thin film 3-4 are coupled at a conductive coupling portion 3-5 to form a winding for the magnetic thin film 3-1. 3-6 is an extraction electrode. Magnetic thin film 3-1 and conductive thin film 3
-3 and 3-4 are insulated with insulating film 3-8,
Depending on the conductivity of the magnetic material 3-9, an insulating film 3-7 may also be formed between the first layer conductor thin film 3-3 and the magnetic material 3-9.
will be established. The winding composed of the first layer conductor thin film 3-3 and the second layer conductor thin film 3-4 is for extracting reproduction output, and is used for perpendicular magnetization recording medium 3-12.
magnetic thin film 3 caused by magnetization recorded in
-Detect changes in magnetic flux within 1. Figure 4, 4-3
indicates the flow of magnetic flux during reproduction. magnetic thin film 3
The magnetic flux passing through the magnetic thin film 3-1 decreases as the distance from the perpendicularly magnetized recording medium 3-12 increases due to leakage of magnetic flux from the magnetic thin film 3-1, so the windings composed of 3-3 and 3-4 are perpendicularly magnetized. It is preferable to locate it as close as possible to the recording medium 3-12. Also, if the gap between the magnetic thin film and the winding becomes large, magnetic flux will leak through it and will no longer contribute to the output from the winding, so it is better to wind the winding close to the magnetic thin film. It is effective to construct the winding with a thin film. First layer conductor thin film 3-3, second layer conductor thin film 3-
Since the winding wire composed of 4 is a thin film, its current capacity is small, and for recording purposes, a normal conducting wire is used to connect the recording winding 3 to
11 will be provided. By passing a recording current through this recording winding 3-11, the magnetic thin film 3-1 and the magnetic body 3
-9 is magnetized, but a non-magnetic spacer 3- is placed between the magnetic body 3-9 and the perpendicular magnetization recording medium 3-12.
10, the perpendicular magnetization recording medium 3-12 is magnetized by the magnetic thin film 3-1 disposed closer than the magnetic body 3-9, and recording is performed. In order to improve the perpendicularity to the medium surface of the magnetic field distribution generated inside the perpendicular magnetization recording medium 3-12 by the magnetic thin film 3-1, the underlayer of the perpendicular magnetization recording medium 3-12 is coated as shown in FIG. A magnetic path 4- is provided with a high permeability magnetic layer 4-1 made of permalloy, amorphous magnetic alloy, etc.
It is effective to make 2.

As described above, the magnetic thin film 3-1 for perpendicular magnetization recording and reproduction, and the magnetic body 3-9 for assisting in forming a closed magnetic path with the magnetic thin film 3-1 and the perpendicular magnetization recording medium 3-12. , a perpendicular magnetization consisting of a reproducing winding consisting of conductor thin films 3-3 and 3-4 applied to the magnetic thin film 3-1 in order to efficiently extract reproduction output, and a recording winding 3-11 having a large current capacity, etc. In the recording/reproducing head, by separating the windings for recording and reproducing, it was possible to record and reproduce with high efficiency.

[Brief explanation of drawings]

FIGS. 1 and 2 show the arrangement of a conventional perpendicular magnetization recording/reproducing head and a perpendicular magnetization recording medium. 1st
The diagram shows elements arranged on both sides of a perpendicular magnetization recording medium 1-2 forming one magnetic head.
FIG. 2 shows a type of magnetic head that performs recording and reproduction from one side of a perpendicularly magnetized recording medium 2-4. FIG. 3 shows one specific example of the present invention, and FIGS. 3 2 and 3 are views seen from directions a and b in FIG. 1, respectively. Arrow 3-13 in FIG. 3 indicates the traveling direction of the perpendicular magnetization recording medium. Figure 4 shows perpendicular magnetization recording medium 3.
2 shows the flow of magnetic flux 4-2 during recording and the flow of magnetic flux 4-3 during reproduction when a high permeability magnetic layer is provided on the base of 4-12. 1-1... Magnetic thin film, 1-2... Perpendicular magnetization recording medium, 1-3... Magnetic material, 1-4... Recording/reproducing winding,
2-1...Magnetic thin film, 2-2...Substrate, 2-3...Recording/reproduction winding, 2-4...Perpendicular magnetization recording medium, 3-1
...Magnetic thin film, 3-2...Magnetic thin film-magnetic material coupling part,
3-3... First layer conductor thin film, 3-4... Second layer conductor thin film, 3-5... Conductor thin film coupling portion, 3-6... Leading electrode, 3-7... Insulating film, 3-8... Insulating film, 3-9...
Magnetic material, 3-10...Nonmagnetic spacer, 3-11
...Recording winding, 3-12...Perpendicular magnetization recording medium, 3
-13...Progressing direction of perpendicular magnetization recording medium, 4-1...
High permeability magnetic layer, 4-2...flow of magnetic flux (during recording),
4-3...Flow of magnetic flux (during playback).

Claims (1)

[Scope of Claims] 1. A perpendicular magnetization recording/reproducing head that performs recording and reproduction on a perpendicular magnetization recording medium, comprising: a magnetic body disposed perpendicularly to the surface of the perpendicular magnetization recording medium; and a surface of the perpendicular magnetization recording medium. The leading end is disposed perpendicularly to the magnetic body and closer to the perpendicular magnetization recording medium surface than the magnetic body, and the rear end, which is farther from the perpendicular magnetization recording medium surface, is magnetically disposed between the magnetic body and the magnetic body. a magnetic thin film adjacent to or coupled to the magnetic material so as to form a path; a first winding formed of a thin film wound around the magnetic thin film to perform reproduction; and a second winding for generating a recording magnetic field, which includes the magnetic thin film and the first winding, and is arranged so that the generated magnetic field is perpendicular to the surface of the perpendicular magnetization recording medium. A perpendicular magnetization recording/reproducing head characterized by: