JPH02122405A - Magnetic head device - Google Patents

Abstract

PURPOSE:To attain high density recording by setting the effective cross section area of each edge part facing the magnetic recording medium of a magnetic flux guide at a small value, and applying a superconducting member around each edge part of the magnetic flux guide. CONSTITUTION:A magnetism recording means 1 and a magnetic flux guide 2 to guide a magnetic signal outputted from the magnetism generating means 1 to a magnetic recording medium 10 are provided. The effective area of the part facing the magnetic recording medium 10 of the magnetic flux guide 2 is set at the small value, and the superconducting member is applied to each edge part periphery of the magnetic flux guide 2. Consequently, when the superconducting member in the external periphery of the magnetic flux guide 2 is in a superconducting condition, since the magnetic flux guide 2 expresses complete diamagnetism, the magnetic flux generated by the magnetic field generator 1 does not leak out of the magnetic flux guide, and it is guided so as to pass through one edge part 2A, the magnetic recording medium 10, and the other edge part 2B in the magnetic flux guide 2. Thus, the magnetic flux at the comparatively high density is formed in the part facing the magnetic recording medium 10, and the high density magnetic recording is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head device, and particularly to a magnetic head device suitable for high fertility recording.

[Conventional technology]

Conventionally, a magnetic head device for recording information on a tape-shaped or sheet-shaped magnetic recording medium uses a perpendicular magnetic recording method. It is customary to place the magnetic parts of the recording head close to each other or in close contact with each other and perform recording using magnetic flux leaking from the magnetic bodies.

On the other hand, recent social demands include higher speed and higher density information recording. Conventionally, the following two conditions have been cited as conditions for solving this problem.

(2) In order to perform high-density recording, the thickness of the magnetic flux that comes out of the magnetic recording head and is used for magnetic recording must be made as thin as possible.

(2) In order to record at high speed, the density of the magnetic flux that comes out of the magnetic recording head and is used for magnetic recording must be made as high as possible.

[Problem to be solved by the invention]

In the conventional example above, in order to reduce the magnetic flux in the conventional magnetic recording head, the magnetic material at the tip of the magnetic recording head (the part that comes into contact with the magnetic recording medium) must be made thinner. This reduces the amount of magnetic flux used for magnetic recording. Even if we try to compensate for this and further increase the magnitude of the magnetic flux for high-speed recording and increase the excitation current of the excitation coil, magnetic materials generally have their own saturation magnetization characteristics, so the magnetic The body cannot pass magnetic flux above a certain limit.

This becomes a limiting condition when trying to increase the recording speed, and as the size of the magnetic flux increases, the amount of magnetic flux that leaks to the surroundings increases unnecessarily, so it is difficult to accurately perform high-density recording. There are situations that are preventing this from happening.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic head device that can improve the disadvantages of the conventional example and perform high-density recording.

[Means to solve the problem]

The present invention includes a magnetism generating means and a magnetic flux guide that guides a magnetic signal output from the magnetism generating means toward a magnetic recording medium. The effective cross-sectional area of the portion of the magnetic flux guide facing the magnetic recording medium is set small, and each end of the magnetic flux guide is coated with a superconducting member. This aims to achieve the above-mentioned purpose.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG.

The embodiment shown in FIG. 1 includes a magnetic field generator 1 as a magnetism generating means activated by a signal source IA, and a magnetic signal output from the magnetic field generator 1 directed toward a magnetic recording medium 10. It is equipped with a magnetic flux guide 2 for guiding the magnetic flux. This magnetic flux guide 2 was developed for use in a perpendicular magnetic recording system, and has a shape in which both ends thereof face each other with a magnetic recording medium interposed therebetween. The outer periphery of this magnetic flux guide 2 is covered with a superconducting member 3.

To explain this in more detail, the magnetic flux guide 2 houses the magnetic field generator 1 in the center. The magnetic flux guide 2 has both ends 2A and 2B narrowed to have a small effective cross-sectional area. End surfaces 2a and 2b of both end portions 2A and 2B of this magnetic flux guide 2 are bent into a rectangular shape as a whole so as to face each other with the magnetic recording medium 10 in between.

Next, the operation of the above embodiment will be explained.

In FIG. 1, when the superconducting member 3 on the outer periphery of the magnetic flux guide 2 is in a superconducting state, the magnetic flux guide 2 exhibits complete diamagnetism. Therefore, the magnetic flux generated by the magnetic field generator 1 does not leak from inside the magnetic flux guide 2 to the outside, and the inside of the magnetic flux guide 2 is distributed between one end 2A, the magnetic recording medium 10° and the other end. He is guided to take a route that passes through 2B. Here, each end portion 2A, 2B of one side and the other side is
All of them are processed to be thin, which allows the magnetic recording medium IO
The magnetic flux density is set to be high at both ends of the magnetic flux guides 2, which are provided facing each other via the magnetic flux guides 2.

In this way, in this example, by utilizing the fact that a superconducting substance exhibits perfect diamagnetism, the superconducting member, which is the part that is in close proximity to the magnetic recording medium, has a narrow opening for the magnetic flux guide inside the superconducting member. This brings about the following effects.

(2) Since the magnetic flux does not leak outside through the walls of the superconducting member, the efficiency of using the magnetic flux generated by the magnetic field generator is improved.

■Prevents blurring on magnetic recording near the aperture,
Can record sharply.

Further, in this embodiment, the present invention is applied to a perpendicular magnetic recording system, but it can be sufficiently applied to other recording systems.

Next, another embodiment will be described based on FIG. 2.

In the embodiment shown in FIG. 2, the tip portion 2 of the magnetic guide 2
1.22 is made of a high magnetic permeability material such as supermalloy, and the other large cross-sectional area is made of a high magnetic permeability material such as grain-oriented silicon steel.
1.42 is coated only on the tip portion 21.22 of the magnetic guide 2. The other configurations are the same as those of the first embodiment described above.

Even in this case, it has the same effect as the first embodiment described above, and has the advantage that it can be obtained at a lower price overall because the amount of materials can be reduced.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to form a relatively high-density magnetic flux in the part facing the magnetic recording medium, which enables high-density magnetic recording, and because the magnetic resistance is small, the magnetic signal changes rapidly. The superconducting material allows for high-speed magnetic recording, and because the superconducting material reduces magnetic flux leakage, blurring on magnetic recording can be suppressed, making clear recording possible. It is possible to provide an unprecedented and excellent magnetic head device that can perform the following functions.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of the present invention, and FIG. 2 is a partially sectional front view showing another embodiment. 1...Magnetic field generator as magnetic generation means, lA
...Signal source, 2...Magnetic flux guide, 2A
, 2B, 21.22... End, 3, 41.42
. . . Superconducting member, 10 . . . Magnetic recording medium.

Claims (1)

[Claims] (1) In a magnetic head device comprising a magnetic flux guide that guides a magnetic signal output from a magnetic generation means toward a magnetic recording medium, each end of a portion of the magnetic flux guide facing the magnetic recording medium is provided. A magnetic head device characterized in that the effective cross-sectional area is set small and each end of the magnetic flux guide is coated with a superconducting member.