JPH08287416A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE: To obtain a magnetic head having high wear resistance and corrosion resistance by arranging a magneto-resistance effect film on a sliding surface side and parting the giant magneto-resistance effect films from a head sliding surface. CONSTITUTION: A magnetic head 100 is composed of a lower shielding film 82 on a ceramic substrate 50 consisting of zirconia, etc., the giant magneto- resistance effect films consisting of a second ferromagnetic layer 10 which is a free layer, a nonmagnetic conductive film 11, a first ferromagnetic film 12 which is a fixing layer and an antiferromagnetic film 13 for fixing the magnetization of the first ferromagnetic film 12, an electrode 40, an upper shielding film 81, a lower magnetic core 84, a coil 41 and an upper magnetic core 83. Namely, a reproducing part and a core for recording are formed on the same slider. The execution of recording and reproducing by the same head is thus made possible. The magnetic disk surface side is the magneto-resistance effect film and the laminated films on the deep side thereof are the giant magneto- resistance effect films. The magnetic head having the lower flying height and the high wear resistance and corrosion resistance is thereby obtd.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus using a so-called giant magnetoresistive film, and more particularly to a magnetic recording / reproducing apparatus having a high recording density.

In particular, according to the present invention, the second ferromagnetic film serving as the magnetic sensitive portion of the giant magnetoresistive film composed of the antiferromagnetic film, the first ferromagnetic film, the nonmagnetic conductive film and the second ferromagnetic film is slid. The magneto-resistive effect element and the giant magneto-resistive effect element are arranged from the sliding surface side to the moving surface, and the magnetic sensitive section is magnetically continuous with the same ferromagnetic film, and outputs can be obtained simultaneously from the two elements. The present invention relates to a magnetic recording device having a magnetic head capable of recording.

[0003]

PRIOR ART European Patent 0 490 608 A
2 describes a sensor using a giant magnetoresistive effect film, in which a first ferromagnetic film, a nonmagnetic metal film, and a second ferromagnetic film are deposited in this order on a substrate such as ceramics or a semiconductor, When the magnetization angle between the magnetic film and the second ferromagnetic film is 0
It is explained that it is 0 degree. A recording / reproducing head using a flux guide is described in US Pat. No. 5,255,141, and the upper magnetic film is also used as a flux guide film of a magnetoresistive effect film.

[0004]

A conventional magnetic recording head using a giant magnetoresistive film has an antiferromagnetic film on the sliding surface.
A first ferromagnetic film, a non-magnetic conductive film and a second ferromagnetic film are laminated. The first ferromagnetic film is magnetically coupled to the antiferromagnetic film, but the magnetic field applied from the medium to the air bearing surface of the magnetic head is 200 Oe or more, and this magnetic field increases, and the first ferromagnetic film and the antiferromagnetic film increase. In the case of a magnetic field in the vicinity of the coupling magnetic field between the films, it is difficult to fix the magnetization of the first ferromagnetic film by the antiferromagnetic film, and the magnetization of the first ferromagnetic film partially moves, which causes head output. Of noise and noise.

Further, since the antiferromagnetic film containing Mn has lower corrosion resistance than the NiFe alloy film, the antiferromagnetic film, the first ferromagnetic film, the nonmagnetic conductive film and the second conductive film are formed on the sliding surface as in the conventional case. When the ferromagnetic films are laminated, the vicinity of the sliding surface of the antiferromagnetic film may be corroded when the head tip portion is processed. At the same time, at the time of head processing, since the film thicknesses of the first ferromagnetic film, the nonmagnetic conductive film, and the second ferromagnetic film are 20 nm or less, in addition to the antiferromagnetic film, Difficult to keep clean.

Further, when the conventional magnetic recording head using the giant magnetoresistive film is used, when the flying height between the medium and the magnetic head is reduced in order to increase the output, the head sliding surface side Since the antiferromagnetic film, the first ferromagnetic film, the non-magnetic conductive film, and the second ferromagnetic film are stacked on top of each other, the layer structure of these giant magnetoresistive films will be detected and output when worn on the medium surface. May decrease.

An object of the present invention is to provide a magnetic recording / reproducing device equipped with a magnetic head having a high output.

[0008]

According to the present invention, in order to solve the above-mentioned conventional drawbacks, only one ferromagnetic film among the respective films constituting the giant magnetoresistive film is provided on the head sliding surface side. By bringing them closer to each other and moving the other film away from the head sliding surface, it is possible to realize a magnetic head with high coercive force, low flying height, high wear resistance, and corrosion resistance. Conventionally, there is U.S. Pat. No. 5,255,141 as an example of using a flux guide by keeping such a magnetoresistive film away from the sliding surface, and the film used for the flux guide is a ferromagnetic film different from the magnetoresistive film (the above-mentioned U.S. Pat. Uses an upper magnetic film) and adopts the method of the above-mentioned US patent for a giant magnetoresistive film. However, when the flux guide is used, the magnetic field applied to the magnetic sensitive portion of the giant magnetoresistive film becomes weak and the output is reduced. Therefore, in the present invention, the magnetoresistive effect film is arranged on the sliding surface (medium facing surface) side of the giant magnetoresistive effect film to form a magnetic sensitive portion of the giant magnetoresistive effect film and a magnetic sensitive portion of the magnetoresistive effect film. The magnetic films were the same (combined). In the present invention, in order to prevent the output reduction of the giant magnetoresistive effect film due to the flux guide, the magnetoresistive effect film is arranged on the sliding surface side of the giant magnetoresistive effect film in common with the magnetic film serving as the magnetic sensing portion. Therefore, the output is generated from the two films of the giant magnetoresistive film and the magnetoresistive film, and the total head output is higher than that of the single film. In the present invention, the second ferromagnetic film that serves as the magnetically sensitive portion in the giant magnetoresistive film and the film that controls the magnetic domain of this second ferromagnetic film face the sliding surface, and another giant magnetoresistive film is provided. The constituent non-magnetic conductive film and the first ferromagnetic film are formed apart from the sliding surface by the height of the magnetoresistive film or more, and the second ferromagnetic film and the non-magnetic conductive film are formed on the substrate or the shield film. After depositing the film and the first ferromagnetic film in this order, remove the non-magnetic conductive film and the first ferromagnetic film other than the second ferromagnetic film that will be the magnetically sensitive portion by ion milling, sputtering, etc. You can After removing these films, an electrode film is deposited. In the magnetic head manufactured in this way, the second ferromagnetic film remains on the head sliding surface, so that the portion where the giant magnetoresistive effect appears is farther from the head sliding surface than the tip of the second ferromagnetic film. The magnetic field from the medium is added to the portion contributing to the giant magnetoresistive effect through the portion of the second ferromagnetic film remaining on the head sliding surface side that does not contribute to the giant magnetoresistive effect. The film thickness of the second ferromagnetic film is as thin as 20 nm or less, and the shunt ratio of the current flowing in the portion contributing to the giant magnetoresistive effect does not extremely decrease. In the magnetic head using the giant magnetoresistive effect of the present invention, since the second ferromagnetic film serves as both the magnetic sensitive portion of the giant magnetoresistive effect film and the magnetic sensitive portion of the magnetoresistive effect film, the manufacturing process is complicated. However, since the portion that contributes to the giant magnetoresistive effect is separated from the sliding surface, the following advantages occur. First, since the first ferromagnetic film, which is magnetically coupled to the antiferromagnetic film, is far from the head sliding surface, the magnetic coupling between these films is apparently reduced by the strong magnetic field from the medium. Can be avoided. That is, even if the exchange coupling magnetic field between the antiferromagnetic film and the first ferromagnetic film is weak, it can be applied to the magnetic disk device by forming the head as in the present invention. Next, since materials such as NiMn and FeMn containing Mn in the antiferromagnetic film have lower corrosion resistance than NiFe-based or CoNiFe-based films, these antiferromagnetic films face the head sliding surface at their ends. When the head is mounted on the magnetic disk device, the antiferromagnetic film is oxidized from the sliding surface side, the exchange coupling magnetic field between the antiferromagnetic film and the first ferromagnetic film is reduced, and the output is reduced. Sometimes. On the other hand, in the case of the magnetic disk device using the giant magnetoresistive effect of the present invention, the antiferromagnetic film is separated from the sliding surface side by the element height or more and is protected by an insulating film such as Al ₂ O _3. Therefore, an antiferromagnetic film having low corrosion resistance can be applied. In addition, since the magnetic sensitive portion that contributes to the output is larger than in the case where each of them is a single film, a high-sensitivity and high-output magnetic head can be realized.

[0009]

According to the present invention, the giant magnetoresistive film, which is an output generation source, is separated from the head sliding surface by the height of the element or more in the magnetic sensing part, and the second ferromagnetic film, which is the magnetic sensing part, has the magnetoresistive effect. Since it also serves as the magnetically sensitive portion of the film, output reduction due to separation from the head sliding surface is suppressed, and therefore it can be applied to a giant magnetoresistive effect magnetic head having a low flying height and high corrosion resistance. The giant magnetoresistive effect is caused by the relative angle of magnetization between the first ferromagnetic film, which is the fixed layer, and the second ferromagnetic film, which is the free layer. The direction of magnetization of the first ferromagnetic film is fixed by exchange coupling with the antiferromagnetic film, but if the exchange coupling magnetic field is not sufficiently high, the magnetization of the first ferromagnetic film is changed by the magnetic field from the medium. The orientation also moves without being fixed, resulting in reduced output and noise. Such output reduction and noise become more remarkable as the flying height between the head and the medium becomes narrower. In the case of the head using the giant magnetoresistive effect of the configuration of the present invention, since the end portions of the antiferromagnetic film and the first ferromagnetic film that is the fixed layer are separated from the sliding surface by the element height or more, The magnetic field from the medium in the ferromagnetic film is reduced, so that the above-mentioned output reduction and noise generation are reduced. Further, in the case of the giant magnetoresistive head according to the configuration of the present invention, it is possible to apply a Mn-based antiferromagnetic film having low corrosion resistance, and the types of applicable materials can be increased. Even in the case of a magnetic disk device with a smaller flying height, since the first ferromagnetic film and the antiferromagnetic film are separated from the sliding surface, they have high wear resistance and are applied to a contact type magnetoresistive head. It is possible.

[0010]

FIG. 2 shows the overall structure of a magnetic disk device 200 to which a magnetic head using the giant magnetoresistive effect according to the present invention is applied. The magnetic disk device 200 includes a plurality of magnetic disks 204a, 204b, 204c, 204d, and 204e stacked on one axis (spindle 202) at equal intervals.
And a motor 203 that drives a spindle 202 and a movable carriage 20 that constitutes a linear actuator.
6, a voice coil motor 213 that drives this, and a base 201 that supports these. The voice coil motor 213 includes a magnet 208 and a voice coil 207. Further, a voice coil motor control circuit 209 for controlling the voice coil motor 213 in accordance with a signal sent from a higher-level device 212 such as a magnetic disk control device is provided. Further, it has a function of converting the data sent from the host device 212 into a current to be passed through the magnetic head in accordance with the writing method, and amplifies the data sent from the magnetic disk 204a and converts it into a digital signal. Write / read circuit 2 with the function to
10 and a current control circuit 214 which is connected to the read circuit of the write / read circuit 210 and controls the giant magnetoresistive film and the current flowing through the magnetoresistive film, and an interface 211 for connecting the host device 212. I have it.

Next, the operation of the magnetic disk device 200 will be described by taking the case of reading as an example. Upper device 21
When the voice coil motor control circuit 209 has a read support from the interface 2 via the interface 211, the control current from the voice coil motor control circuit 209 causes
The voice coil motor 213 operates the carriage 206 to move the magnetic head groups 205a, 205b, etc. at high speed to the position of the track where the instructed data is stored, and position them accurately. This positioning is performed by the positioning magnetic head 205b connected to the voice coil motor control circuit 209 detecting and providing the position on the magnetic disk 204c and controlling the position of the data magnetic head 205a. Further, the motor 203 supported by the base 201 includes a plurality of magnetic disks 204a, 2 having a diameter of 3.5 inches mounted on the spindle 202.
04b, 204c, 204e are rotated.

Next, according to the signal from the write / read circuit 210, a specified predetermined magnetic head is selected, the head position of the specified area is detected, and then the data signal on the magnetic disk is read. This read is a write /
This is performed by the data magnetic head 205a connected to the read circuit 210 exchanging signals with the magnetic disk 204d.

In the present invention, the magnetic head 205a and the like are the second ferromagnetic film which is a free layer which also serves as the magnetically sensitive portion of the magnetoresistive film, the nonmagnetic conductive film, the first ferromagnetic film which is the fixed layer, and the first ferromagnetic film. It is composed of a giant magnetoresistive film composed of an antiferromagnetic film that fixes one ferromagnetic film. As a high-performance magnetic disk device, it is desirable that the areal recording density on the magnetic disk is 50 megabits or more per square inch, the linear recording density is 25 kilobits or more per inch, and the track density is 2000 tracks or more per inch.
The magnetic head using the giant magnetoresistive film according to the present invention described below has no Barkhausen noise as a result of no magnetic domain wall being formed in the magnetically sensitive portion, and has higher sensitivity than the magnetoresistive film of a ferromagnetic single layer. Therefore, by using this head to create a magnetic disk device, a magnetic disk device having a recording density of 600 megabits per square centimeter or more can be created.

FIG. 1 shows a magnetic disk device 200 of the present invention.
3 is a perspective view of a magnetic head using a giant magnetoresistive effect film used as the magnetic heads 205a to 205d of FIG.

Reference numeral 1 is an anisotropic magnetoresistive effect element, and 2 is a giant magnetoresistive effect element. FIG. 1 shows a perspective view seen from the sliding surface side facing the magnetic disk. The magnetic head 100 of FIG. 1 includes a lower shield film 82 and a second ferromagnetic film 1 as a free layer on a ceramic substrate 50 such as zirconia.
0, non-magnetic conductive film 11, first ferromagnetic film 12 which is a fixed layer
And a giant magnetoresistive film composed of an antiferromagnetic film 13 for fixing the magnetization of the first ferromagnetic film, an electrode 40, and an upper shield film 8.
1, lower magnetic core 84, coil 41, upper magnetic core 83
It consists of That is, the reproducing section and the recording core can be formed on the same slider, and recording and reproducing can be performed by the same head. In this embodiment, the magnetic disk surface side is the magnetoresistive effect film, and the laminated film behind it is the giant magnetoresistive effect film.

Next, the functions and materials of the above-mentioned films and layers will be described. Upper shield film 81, lower shield film 82
Serves to prevent the magnetic field other than the signal from affecting the second ferromagnetic film 10 and enhance the signal resolution of the magnetic head 100. The material is a soft magnetic film such as a NiFe alloy, a NiCo alloy, or a Co-based amorphous alloy, and its film thickness is about 0.5.
Is about 3 μm. The upper gap film and the lower gap film adjacent to the upper shield film 81 and the lower shield film 82 are a giant magnetoresistive film, and the upper and lower shield films 81, 8
It acts to electrically and magnetically isolate 2 from each other, and is made of a non-magnetic insulator such as glass or alumina. The film thicknesses of the upper and lower gap films affect the reproducing resolution of the magnetic head, and therefore depend on the recording density desired for the magnetic disk device and are usually in the range of 0.4 to 0.1 μm. The first and second ferromagnetic films 12 and 10 are made of NiFe alloy, NiCo alloy,
It is formed of a soft magnetic film such as NiFeCo alloy or Co alloy. The film thickness is 1 to 10 nm. A portion of the second ferromagnetic film 10 which is directly below the non-magnetic conductive film 11 and the anti-ferromagnetic film 13 sandwiched by the electrodes 40 is called a magnetically sensitive portion. The part reads magnetic signals from the magnetic disk. In the magnetic head 100, the magnetic sensitive portion of the second ferromagnetic film 10 is 0.001 μm from the head sliding surface.
The same film continuous with the magnetic sensitive portion of the second ferromagnetic film 10 is formed up to the head sliding surface at a distance of m or more, and the portion of the second ferromagnetic film 10 on the sliding surface side from the magnetic sensitive portion is Becomes a giant magnetoresistive film flux guide and magnetoresistive film,
The leakage magnetic field from the medium is introduced into the magnetic sensitive portion of the second ferromagnetic film 10, and at the same time, an output is generated due to the resistance change. A method of forming the second ferromagnetic film 10, the nonmagnetic conductive film 11, the first ferromagnetic film 12 and the antiferromagnetic film 13 will be described below.
These films are formed by a vapor deposition method such as a sputtering method or a vacuum vapor deposition method, and after the second ferromagnetic film is formed, the film above the non-magnetic conductive film 11 is used as a sliding surface by a mask or the like from the element. A method in which the second ferromagnetic film 10 is moved by a height or more and a continuous surface from the second ferromagnetic film 10 to the antiferromagnetic film 13 is deposited, and then a sliding surface is formed from the magnetic sensitive portion of the second ferromagnetic film 10 by an ion milling method or a sputter etching method. There is a method of removing the portion of the non-magnetic conductive film from the antiferromagnetic film on the side portion. In the latter case, a second ferromagnetic film, which is thicker than the film thickness to be the magnetic field sensitive area, is formed in advance, and only the magnetic field sensitive area is sputtered by ion milling or the like to form the second ferromagnetic film which will become the magnetic field sensitive area. You can
It is possible to increase the magnetic field applied to the magnetically sensitive portion of the giant magnetoresistive film and simultaneously increase the output by the giant magnetoresistive element and the magnetoresistive element.

FIG. 3 is a diagram showing the relationship between the reproduction output and the magnetic field applied from the medium when the magnetic head having the anisotropic magnetoresistive effect element 1 according to the present invention is used. For comparison, a reproduction output of a magnetic head using a conventional giant magnetoresistive film having no magnetoresistive element on the sliding surface side of the giant magnetoresistive element such as the magnetic head 100 is shown. In the low magnetic field region, the reproducing output of the conventional magnetic head is high, but in the high magnetic field side, the magnetic head 100 shows higher reproducing output. It is considered that this is because the magnetic field from the medium causes the magnetization of the first ferromagnetic film, which is the fixed layer in the case of the conventional magnetic head, to fluctuate on the high magnetic field side, and the reproduction output is saturated.
On the other hand, in the case of the magnetic head according to the present invention, since the first ferromagnetic film and the antiferromagnetic film, which are the fixed layers, are formed apart from the sliding surface by 0 element height or more, the medium strong against the sliding surface is obtained. Even when a magnetic field is applied, the magnetization of the first ferromagnetic film is fixed by the antiferromagnetic film, and the two outputs of the giant magnetoresistive film and the magnetoresistive film overlap, resulting in high output.

FIG. 4 is a diagram showing the reproduction output when the magnetic head 100 of the present invention is manufactured by changing the element height of the magnetoresistive effect film. The length of the magnetoresistive effect film part on the sliding surface side of the second ferromagnetic film which also functions as a magnetic sensitive part is determined by changing the processing position of the sliding surface or the milling position when forming the giant magnetoresistive effect film. It is possible to The width (element height) of the magnetoresistive film perpendicular to the sliding surface is 0.0
The length of 1 μm or more can be changed by using the milling method, and the reproduction output depends on the flying height as well as the element height. When the flying height is 20 nm (0.02 μm), the reproduction output is high when the element height is in the range of 0.01 to 0.02 μm (the reproduction output is higher than when the element height is extrapolated to 0). ), And if it exceeds 0.02 μm, the reproduction output decreases.

When the flying height is 100 nm,
The reproduction output is high with a device height of 01 to 0.1 μm. When the element height of the magnetoresistive film was changed in this way, the magnetic head 100 of the present invention could detect the output up to an element height of about 1 μm. As can be seen from FIG. 5, a high output is obtained in the range where the element height is substantially below the flying height.

In the magnetic head 100 shown in FIG. 5, noise is easily generated in the magnetoresistive effect film on the sliding surface side, so that the magnetoresistive effect and the giant magnetoresistive effect element of the film structure are used. Reference numeral 21 denotes an antiferromagnetic film for fixing the magnetic sensitive portion of the giant magnetoresistive film other than the magnetic sensitive portion of the magnetoresistive film 22 continuous with the magnetic sensitive portion.
A spacer 23 is provided between them, and a high resistance soft magnetic film 25 is formed on the magnetoresistive effect film 22 with a base film 24 interposed therebetween. By using such an element structure, a high output magnetoresistive effect element having an appropriate off-track characteristic and bias can be realized. This embodiment is oriented in the same direction as in FIG. 1, and is composed of an anisotropic magnetoresistive effect film on the front side and a giant magnetoresistive effect film on the back side. In FIG. 6, an electrode 31 is provided on an element composed of a giant magnetoresistive effect film and a magnetoresistive effect film. From the figure, it is possible to make the currents and bias values flowing through the magnetoresistive effect film and the giant magnetoresistive effect film appropriate. Magnetosensitive portion (continuous with the magnetoresistive effect film on the sliding surface side) 32 in the giant magnetoresistive effect film, non-magnetic conductive film 33, ferromagnetic film (fixed layer) 34 and antiferromagnetic film 3
5 is arranged after the magnetoresistive film as seen from the sliding surface, and the current can be changed independently depending on the flying height, output, and bias. This embodiment also has the same orientation as in FIG. 5 and has two similar magnetoresistive films.

[0021]

The present invention forms a giant magnetoresistive effect film by simultaneously forming a free layer and a magnetoresistive effect film, which are magnetically sensitive parts of the giant magnetoresistive effect film, and disposing the magnetoresistive effect film on the sliding surface side. By moving away from the head sliding surface, application to high coercive force medium, low flying height, high wear resistance, and corrosion resistant magnetic head can be realized. The magnetic head using the giant magnetoresistive effect of the present invention has the following advantages. First, since the first ferromagnetic film that is magnetically coupled to the antiferromagnetic film is far from the head sliding surface, the magnetic coupling between these films is apparently reduced by the strong magnetic field from the medium. Can be avoided. That is, even if the exchange coupling magnetic field between the antiferromagnetic film and the first ferromagnetic film is weak, it can be applied to the magnetic disk device by forming the head as in the present invention. In the case of a magnetic disk device using the giant magnetoresistive effect of the present invention,
Since the antiferromagnetic film is separated from the sliding surface side through the magnetoresistive film and is protected by an insulating film such as Al ₂ O _{3, an} antiferromagnetic film with low corrosion resistance can also be applied. Is obtained from both the magnetoresistive effect and giant magnetoresistive effect films, resulting in high output.

[Brief description of drawings]

FIG. 1 is a perspective view of a recording / reproducing magnetic head.

FIG. 2 is a block diagram showing the overall configuration of a magnetic disk device.

FIG. 3 is a normalized output when the magnetic head of the present invention is used.

FIG. 4 shows a change in output depending on the element height of the magnetoresistive film.

FIG. 5 is a film configuration as seen from the sliding surface side of the low noise magnetic head (only in the vicinity of the magnetic sensing part).

FIG. 6 is a film structure of an independent current control magnetic head.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Anisotropic magnetoresistive effect element, 2 ... Giant magnetoresistive effect element, 10 ... 2nd ferromagnetic film (ferromagnetic free layer used as a magnetic-sensing part), 11, 33 ... Nonmagnetic conductive film, 12 ... 1st Ferromagnetic film (fixed layer), 13, 21, 35 ... Antiferromagnetic film, 22 ... Magnetoresistive film, 23 ... Spacer, 24 ... Underlayer film, 25 ...
High resistance soft magnetic film, 31, 40 ... Electrodes, 41 ... Coil, 5
0 ... Substrate, 81 ... Upper shield film, 82 ... Lower shield film, 83 ... Upper magnetic core, 84 ... Lower magnetic core.

Claims (8)

[Claims] 1. A magnetic disk having a ferromagnetic recording medium on which a signal is magnetically recorded, and a magnetic disk close to the magnetic disk,
In a magnetic recording / reproducing apparatus having a magnetic head for detecting a magnetic field generated from the recording medium, the magnetic head includes an antiferromagnetic film, a first ferromagnetic film, a nonmagnetic conductive film, and a second ferromagnetic film sequentially. It has a giant magnetoresistive film that is laminated and has an electric resistance that changes depending on the angle formed by the mutual magnetizations of the ferromagnetic films, and a magnetoresistive film that is magnetically coupled to the giant magnetoresistive film. And a magnetic recording / reproducing apparatus. 2. A magnetic disk having a ferromagnetic recording medium on which a signal is magnetically recorded, and a magnetic disk close to the magnetic disk,
In a magnetic recording / reproducing apparatus having a magnetic head for detecting a magnetic field leaking from the recording medium, the magnetic head has a giant magnetoresistive effect film and a magnetoresistive effect film, and the magnetic sensing section of the giant magnetoresistive effect film. A magnetic recording / reproducing apparatus, wherein a layer to be formed is continuous with the magnetoresistive effect film, and an output can be obtained from the giant magnetoresistive effect film and the magnetoresistive effect film. 3. A magnetic disk having a ferromagnetic recording medium for magnetically recording a signal, and a magnetic disk close to the magnetic disk,
In a magnetic recording / reproducing apparatus having a magnetic head for detecting a magnetic field leaking from the recording medium, the magnetic head comprises an antiferromagnetic film, a first ferromagnetic film, a nonmagnetic conductive film, and a second ferromagnetic film in that order. A first laminated magnetoresistive film having a giant magnetoresistive film whose electric resistance changes depending on an angle formed by the mutual magnetizations of the ferromagnetic films and an electric terminal for applying a current to the film. Has exchange coupling with the ferromagnetic film of
A magnetic recording / reproducing apparatus characterized in that a magnetoresistive film and a giant magnetoresistive effect are arranged in this order from the end of the sliding surface side of the magnetic head. 4. A ferromagnetic film having a giant magnetoresistive effect film and a magnetoresistive effect film, which serves as a magnetic sensitive portion of the giant magnetoresistive effect film, and a ferromagnetic film which serves as a magnetic sensitive portion of the magnetoresistive effect film. A magnetic recording device having a magnetic head made of the same film. 5. The magnetic recording apparatus according to claim 4, wherein an electric current is simultaneously applied to the ferromagnetic film through a conductive film to obtain an output. 6. A magnetic disk having a ferromagnetic recording medium for magnetically recording a signal, and a magnetic disk close to the magnetic disk,
In a magnetic recording / reproducing apparatus having a magnetic head for detecting a magnetic field leaking from the recording medium, the magnetic head comprises an antiferromagnetic film, a first ferromagnetic film, a nonmagnetic conductive film, and a second ferromagnetic film sequentially. A giant magnetoresistive effect film, which is laminated and whose electric resistance changes depending on an angle formed by mutual magnetizations of the ferromagnetic films, and a magnetoresistive effect film magnetically coupled to the giant magnetoresistive effect film, A magnetic recording / reproducing apparatus, wherein the magneto-sensitive part of the resistance effect film and the magneto-sensitive part of the magneto-resistive effect film rotate simultaneously. 7. A magnetic head having a giant magnetoresistive effect film and a magnetoresistive effect film, comprising: a ferromagnetic film serving as a magnetic sensitive portion of the giant magnetoresistive effect film and a magnetic sensitive portion of the magnetoresistive effect film. A magnetic recording device characterized in that the ferromagnetic films are made of the same film, the magnetically sensitive portions of the ferromagnetic films are magnetized and rotated, and current is simultaneously applied through the conductive film to obtain an output. 8. A magnetic head having a giant magnetoresistive effect film and a magnetoresistive effect film, comprising: a ferromagnetic film serving as a magnetic sensitive portion of the giant magnetoresistive effect film and a magnetic sensitive portion of the magnetoresistive effect film. A magnetic recording device characterized in that the ferromagnetic films are the same film, and the magnetically sensitive portions of the ferromagnetic films are simultaneously magnetized and rotated, and current is controlled by using four electrodes to obtain an output.