Abstract: A base film of a hard magnetic film containing Co as a structural element has a crystal metal base film such as a Cr film formed on the main surface of a substrate and a reactive base film (mixing layer) formed between the substrate and the crystal metal base film and having a reactive amorphous layer containing a structural element of the substrate and a structural element of the crystal metal base film. A hard magnetic film containing Co as a structural element is formed on the crystal metal base film. With the crystal metal base film such as the Cr film formed on an amorphous layer, a hard magnetic film with a bi-crystal structure can be obtained with high reproducibility. With the hard magnetic film, magnetic characteristics such as coercive force Hc, residual magnetization Mr, saturated magnetization Ms, and square ratio S can be improved without need to use a thick base film.

Abstract: A base film of a hard magnetic film containing Co as a structural element has a crystal metal base film such as a Cr film formed on the main surface of a substrate and a reactive base film (mixing layer) formed between the substrate and the crystal metal base film and having a reactive amorphous layer containing a structural element of the substrate and a structural element of the crystal metal base film. A hard magnetic film containing Co as a structural element is formed on the crystal metal base film. With the crystal metal base film such as the Cr film formed on an amorphous layer, a hard magnetic film with a bi-crystal structure can be obtained with high reproducibility. With the hard magnetic film, magnetic characteristics such as coercive force Hc, residual magnetization Mr, saturated magnetization Ms, and square ratio S can be improved without need to use a thick base film.

Abstract: A base film of a hard magnetic film containing Co as a structural element has a crystal metal base film such as a Cr film formed on the main surface of a substrate and a reactive base film (mixing layer) formed between the substrate and the crystal metal base film and having a reactive amorphous layer containing a structural element of the substrate and a structural element of the crystal metal base film. A hard magnetic film containing Co as a structural element is formed on the crystal metal base film. With the crystal metal base film such as the Cr film formed on an amorphous layer, a hard magnetic film with a bi-crystal structure can be obtained with high reproducibility. With the hard magnetic film, magnetic characteristics such as coercive force Hc, residual magnetization Mr, saturated magnetization Ms, and square ratio S can be improved without need to use a thick base film.

Abstract: In a magnetoresistive effect element, at least one of electrodes for supplying a current perpendicularly to the film plane of a magnetoresistive effect film is narrower than the distance between bias-applying films. The sensitivity of the magnetoresistive effect film is lower in regions thereof near the bias-applying films due to an intensive bias magnetic field from the bias-applying films. However, the electrodes are disposed in an inner region having a high sensitivity avoiding those regions with a lower sensitivity to ensure a high sensitivity. The electrodes disposed on and under the magnetoresistive effect film are pillar-shaped to concentrate the sense current such that the sense current can be concentrically supplied exclusively to the region with the high sensitivity.

Abstract: A method for manufacturing a magnetic head which includes a lower write pole having a projection, an upper write pole having a projection opposed to the projection of the lower write pole, and a magnetic gap interposed between the projection of the upper write pole and the projection of the lower write pole, comprising: a first step of making the magnetic gap on the projection of the lower write pole; a second step of making a non-magnetic material layer on the lower write pole, the non-magnetic material layer having a projection on its top surface in positional alignment with the projection of the lower write pole; a third step of making a mask layer on the non-magnetic material layer, the mask layer having an opening in which the top surface of the projection of the non-magnetic material layer is exposed; a fourth step of making a curved recess in the non-magnetic material layer by isotropically etching the non-magnetic material layer through the opening of the mask layer; a fifth step of making an approxim

Abstract: A magnetic head for vertical magnetic.

Abstract: A method for manufacturing a magnetic head which includes a lower write pole having a projection, an upper write pole having a projection opposed to the projection of the lower write pole, and a magnetic gap interposed between the projection of the upper write pole and the projection of the upper write pole, comprising: a first step of making the magnetic gap on the projection of the lower write pole; a second step of making a non-magnetic material layer on the lower write pole, the non-magnetic material layer having a projection on its top surface in positional alignment with the projection of the lower write pole; a third step of making a mask layer on the non-magnetic material layer, the mask layer having an opening in which the top surface of the projection of the non-magnetic material layer is exposed; a fourth step of making a curved recess in the non-magnetic material layer by isotropically etching the non-magnetic material layer through the opening of the mask layer; a fifth step of making an approxim

Abstract: A method for manufacturing a magnetic head which includes a lower write pole having a projection, an upper write pole having a projection opposed to the projection of the lower write pole, and a magnetic gap interposed between the projection of the upper write pole and the projection of the upper write pole, comprising: a first step of making the magnetic gap on the projection of the lower write pole; a second step of making a non-magnetic material layer on the lower write pole, the non-magnetic material layer having a projection on its top surface in positional alignment with the projection of the lower write pole; a third step of making a mask layer on the non-magnetic material layer, the mask layer having an opening in which the top surface of the projection of the non-magnetic material layer is exposed; a fourth step of making a curved recess in the non-magnetic material layer by isotropically etching the non-magnetic material layer through the opening of the mask layer; a fifth step of making an approxim

Abstract: In a magnetoresistive effect element, at least one of electrodes for supplying a current perpendicularly to the film plane of a magnetoresistive effect film is narrower than the distance between bias-applying films. The sensitivity of the magnetoresistive effect film is lower in regions thereof near the bias-applying films due to an intensive bias magnetic field from the bias-applying films. However, the electrodes are disposed in an inner region having a high sensitivity avoiding those regions with a lower sensitivity to ensure a high sensitivity. The electrodes disposed on and under the magnetoresistive effect film are pillar-shaped to concentrate the sense current such that the sense current can be concentrically supplied exclusively to the region with the high sensitivity.

Abstract: A recording-reproducing magnetic head comprising a magnetoresistance effect reproducing head and an inductive recording head. The magnetoresistance effect reproducing head having a magnetoresistance effect element and the inductive recording head having a lower magnetic core, an upper magnetic core, coils sandwiched between the lower and upper magnetic cores at their mid-parts, and a recording magnetic cores at leading end parts. The leading end parts of the lower and upper magnetic cores having a protruding part protruding to the recording magnetic gap layer and the upper magnetic core having a continuous magnetic body which extends from the protruding part to the mid-part. A center line of the protruding part of the lower magnetic core, which extends in a track length direction on a surface opposite a medium, intersecting the protruding part of the upper magnetic core.

Abstract: At least one magnetic pole out of a pair of magnetic poles is provided with a T-shaped magnetic pole having a magnetic pole chip at the position contacting with a magnetic gap and an auxiliary magnetic pole which is wider than thereof. The proximity of an air bearing surface of the T-shaped magnetic pole is composed of a laminated film containing a magnetic material layer with a high saturated magnetic flux density which composes the magnetic pole chip and a portion of the auxiliary magnetic pole and a magnetic material layer with a low saturated magnetic flux density which composes the remaining portion of the auxiliary magnetic pole. When the front portion of the magnetic pole with the track width of 1.8 &mgr;m or less is composed of a laminated film containing a magnetic material layer having a high saturated magnetic flux density and a magnetic material layer having a low saturated magnetic flux density, the thickness of the magnetic material layer having the high saturated magnetic flux density is 0.

Abstract: There are provided a magnetic head for vertical magnetic recording capable of suppressing noises due to a magnetically soft layer and improving the lowering of efficiency, and a magnetic recording and/or reproducing system using the same.

Abstract: A magnetic head has a recording magnetic yoke on the side of an air bearing surface of which a recording magnetic gap film is interposed and a reproducing magnetic yoke on the side of an air bearing surface of which a reproducing magnetic gap film is interposed. The magnetic yoke can serve concurrently for recording/reproducing. A recording coil supplying a recording magnetic flux to a recording medium through a recording magnetic yoke is disposed along one main surface of a magnetic yoke. An MR element in which a signal magnetic flux is led from a recording medium through a reproducing magnetic yoke is disposed along the other main surface on opposite side from a recording coil of a magnetic yoke. Or, at least on extension of a film plane of a magnetic gap film, a ferromagnetic layer is disposed so as for a film plane to exist in almost perpendicular direction relative to the film plane.

Abstract: A thin film magnetic head has a reproducing element or/and recording element which is held from the direction of its thickness between a first ceramic substrate and a second ceramic substrate. The reproducing element or/and recording element is positioned at substantially the center with respect to the direction of track width. The first and second ceramic substrates hold the reproducing element or/and recording element from, for example, the direction of track width. The reproducing element or/and recording element is provided with a yoke type reproducing part which has at least one pair of magnetic cores with a magnetic gap therebetween on the side of a medium opposed face and a magnetoresistance effect element to which a signal magnetic flux from a magnetic recording medium is led through the pair of magnetic cores.

Abstract: A thin-film magnetic head comprises a magnetic gap disposed to be positioned on an air bearing surface of the magnetic head, a pair of magnetic poles disposed to hold the magnetic gap therebetween, and a coil positioned between the pair of the magnetic poles to intersect the magnetic poles, wherein at least one of the magnetic poles being composed of a T-shaped magnetic pole, the T-shaped magnetic pole comprising a front part of a magnetic pole contacting with the magnetic gap, an intermediate part of a magnetic pole lying on the front part, and a rear part of a magnetic pole lying on the intermediate part, wherein a width of the front part roughly defines a track width, the rear part has a wider width in a direction of track width than a width of the front part, and the intermediate part contacts with the rear part at an entire width of the rear part at the air bearing surface and has a narrower width at a contacting face with the front part than the width of the rear part.

Abstract: A magnetoresistance effect type head comprises a magnetoresistance effect film having a pair of leads connected thereto and possessing a magnetic field responding part and a pair of upper and lower shield layers having a magnetoresistance effect film nipped therebetween through the medium of a magnetic gap-forming insulating film. This magnetoresistance effect type head satisfies the relations, W.sub.s <W.sub.r and T.sub.r <W.sub.r, wherein W.sub.s stands for the width of the surface of the upper shield layer facing the magnetoresistance effect film, W.sub.r for the distance between the pair of leads, and T.sub.r for the width of the magnetic field responding part of the magnetoresistance effect film. The magnetic field responding part of the magnetoresistance effect film is formed as of the remainder of the MR film region whose magnetic moment is fixed outside the end part of the upper shield layer facing the MA film.

Abstract: At least one magnetic pole out of a pair of magnetic poles is provided with a T-shaped magnetic pole having a magnetic pole chip at the position contacting with a magnetic gap and an auxiliary magnetic pole which is wider than thereof. The proximity of an air bearing surface of the T-shaped magnetic pole is composed of a laminated film containing a magnetic material layer with a high saturated magnetic flux density which composes the magnetic pole chip and a portion of the auxiliary magnetic pole and a magnetic material layer with a low saturated magnetic flux density which composes the remaining portion of the auxiliary magnetic pole. When the front portion of the magnetic pole with the track width of 1.8 .mu.m or less is composed of a laminated film containing a magnetic material layer having a high saturated magnetic flux density and a magnetic material layer having a low saturated magnetic flux density, the thickness of the magnetic material layer having the high saturated magnetic flux density is 0.5 .

Abstract: A voltage nonlinear resistor of a sintered substance of a composite consisting essentially of zinc oxide and containing at least one rare earth element and at least one additional rare earth element selected from the group consisting of Eu, Gd, Tb, Dy, Ho, Y, Er, Tm, Yb, and Lu, and Bi and Sb. Spacing d.sub.n (.ANG.) provided from precipitation grains formed in zinc oxide grains or on a grain boundary lies in the range of 2.85 .ANG..ltoreq.d.sub.1 .ltoreq.2.91 .ANG., 1.83 .ANG..ltoreq.d.sub.2 .ltoreq.1.89 .ANG., 1.77 .ANG..ltoreq.d.sub.3 .ltoreq.1.82 .ANG., 1.56 .ANG..ltoreq.d.sub.4 .ltoreq.1.61 .ANG., 1.54 .ANG..ltoreq.d.sub.5 .ltoreq.1.60 .ANG.. The spacing mentioned here is a spacing obtained according to the Bragg condition in the X-ray diffraction method.

Abstract: A magnetoresistance effect type head comprises a magnetoresistance effect film having a pair of leads connected thereto and possessing a magnetic field responding part and a pair of upper and lower shield layers having a magnetoresistance effect film nipped therebetween through the medium of a magnetic gap-forming insulating film. This magnetoresistance effect type head satisfies the relations, W.sub.s <W.sub.r and T.sub.r <W.sub.r, wherein W.sub.s stands for the width of the surface of the upper shield layer facing the magnetoresistance effect film, W.sub.r for the distance between the pair of leads, and T.sub.r for the width of the magnetic field responding part of the magnetoresistance effect film. The magnetic field responding part of the magnetoresistance effect film is formed as of the remainder of the MR film region whose magnetic moment is fixed outside the end part of the upper shield layer facing the MA film.

Abstract: A composite magnetic head includes a recording head and a reproducing head. The recording head may be formed below or above the reproducing head. The lower of the recording and reproducing heads includes a first electrode. In addition, a conductive layer acting as a pole structure for the recording head includes a portion defining a hole through which a second electrode is made to contact the first electrode.