Abstract: A fabrication process for a complex magnetic head having a reproducing MR head and a recording ID head comprises the steps of forming the MR head, forming an insulator film on the MR head, forming a photoresist frame on the insulator film, forming a top magnetic pole inside the photoresist frame by plating, trimming the top magnetic pole for defining the end width of the ID head while leaving the photoresist frame, and removing the photoresist frame. The photoresist frame protects the underlying films against the trimming and also protects the top magnetic pole film against an etching solution.

Abstract: An inductive head structure provided in a magnetoresistance effect composite head includes an inductive head and a magnetoresistance effect head, the inductive head structure including a magnetic gap layer sandwiched by first and second magnetic layers acting as magnetic poles, the first magnetic layer being positioned close to the magnetoresistance effect head, the magnetic gap layer being made of a non-magnetic and electrically insulative material, wherein the non-magnetic and electrically insulative material has a higher etching rate to reactive ion etching than at least a magnetic material of the second magnetic layer.

Abstract: A multi-layer structure includes a magnetic pole layer, a magnetic isolation layer extending over the magnetic pole layer, and a magnetic layer extending over the magnetic isolation layer so that the magnetic layer is isolated by the magnetic isolation layer from the magnetic pole layer, the magnetic layer having a unidirectional magnetization in parallel to an interface between the magnetic isolation layer and the magnetic layer, the magnetic isolation layer being capable of suppressing a generation of exchange coupling between the magnetic layer and the magnetic pole layer, so that a magnetization of the magnetic pole layer is biased and stabilized in a direction antiparallel to a direction of magnetization of magnetic layer by static magnetic coupling of the magnetization of the magnetic layer.

Abstract: A central region susceptible to medium magnetic field is formed. End regions (13 to 15) sandwich and extend from the ends of the central region, and apply a vertical bias to the central region. These regions are formed on a substrate (1 to 5). The central region comprises a laminate layer having a SAL layer (5), a magnetic separation layer (6), a magnetoresistance layer (8), and an insulating layer (9), these layers being nearer the substrate in the mentioned order. The thicknesses of the individual layers, particularly the thickness of the insulating layer, are controlled to satisfy a relation of the thicknesses and ion milling rates of the layers given as:(.delta..sub.a /R.sub.a)+(.delta..sub.b /R.sub.b)<(.delta..sub.c /R.sub.c)+(.delta..sub.d /R.sub.d)where .delta..sub.a and R.sub.a are respectively thickness and ion milling rate of the horizontal bias layer, .delta..sup.b and R.sub.b are those of the magnetic separation layer, .delta..sub.c and R.sub.c are those of the magnetoresistance layer, and .

Abstract: A surface structure of a magnetoresistive film includes a magnetosensitive portion surrounded by a peripheral portion including at least an electrode film and a magnetic film underlying the electrode film for applying a unidirectional magnetic field onto the magnetosensitive portion. Side edges of the magnetoresistive film are covered by the magnetic film to be separated from the electrode film. An insulation film is on at least a peripheral area of a top surface of the magnetoresistive film so that a part of the electrode film extends on the insulating film so that the top surface of the magnetoresistive film is separated by the insulating film from the electrode film so as to keep an effective area of the magnetoresistive film in an actual area thereof.

Abstract: A magnetic head of the present invention has a magnetic core and a substrate for supporting the magnetic core. The magnetic core has a magnetic layer which is of a soft magnetic alloy mainly composed of FeTaN. The composition of the alloy meets 72.ltoreq.x.ltoreq.82, 5.ltoreq.y.ltoreq.15, 10.ltoreq.z.ltoreq.15 by atomic percent, where the alloy is indicated to be Fe.sub.x M.sub.y N.sub.z. The magnetic layer contains crystal grains of body-centered cubic structure, and each diameter of said crystal grains is less than 10 nm. The crystal grains have lattice planes which are orientated at random.

Abstract: A surface structure of a magnetoresistive film involved in a magnetosensitive portion surrounded by a peripheral portion including at least an electrode film and a magnetic film underlying the electrode film for applying a unidirectional magnetic field onto the magnetosensitive portion, side edges of the magnetoresistive film are covered by the magnetic film so as to keep the side edges separate from the electrode film, an insulation film is provided on at least a peripheral area of a top surface of the magnetoresistive film so that a part of the electrode film extends on the insulating film thereby the top surface of the magnetoresistive film is separated by the insulating film from the electrode film so as to keep an effective area of the magnetoresistive film in an actual area thereof.

Abstract: A magnetic structure is provided with an alumina layer formed between a ceramic substrate and a soft magnetic layer. The alumina layer has a formative energy of oxide lower than that of the soft magnetic layer to protect diffusion of oxygen to the soft magnetic layer, when the soft magnetic layer is heated to be formed. Further, a bonding glass layer is positioned between the ceramic substrate and the alumina layer, and another ceramic substrate is formed on the soft magnetic layer.

Abstract: A magnetic head includes a magnetic alloy material suitable for high density recording having a composition of (Fe.sub.x M.sub.y N.sub.z).sub.a L.sub.b, where L is Cu and/or Ag. The provision of Cu and/or Ag in a range from 0.5 to 5.0 at % enhances the thermal stability of the soft magnetic properties of the head.

Abstract: When depositing an alloy film on a substrate by sputtering, a thickness of the deposited alloy film is measured and accumulated with respect to one alloy target. A sputtering power or a sputtering gas pressure is calculated in accordance with a predetermined equation defining a desired saturation magnetostriction using the accumulated thickness. Thus, the sputtering power or sputtering gas pressure is controlled to obtain the desired saturation magnetostriction.

Abstract: In order to improve a wear resistance and recording and reproducing properties of a magnetic head which has a magnetic core having a magnetic gap and a penetrated hole, a pair of reinforcing members holding the magnetic core therebetween, each having an opening corresponding to the penetrated hole, and a winding wound onto the magnetic core and the reinforcing members through the penetrated hole and the opening, each of the reinforcing member is a non-magnetic substrate which is made of a ceramic material essentially consisting of 2-30 weight % CaO, 2-50 weight % TiO.sub.2, and 30-80 weight % NiO and having an average grain size of 2 .mu.m or less. Alternatively, another ceramic is used which essentially consists of 2-30 weight % CaO, 2-50 weight % TiO.sub.2, 30-80 weight % NiO, and 0.2-1 weight % Al.sub.2 O.sub.3, and having an average grain size of 2 .mu.m or less, excluding zero.

Abstract: A magnetic alloy film suitable for high density recording has a composition of (Fe.sub.x M.sub.y N.sub.z).sub.a L.sub.b, where L is Cu and/or Ag. The provision of Cu and/or Ag in a range from 0.5 to 5 atomic % enhances thermal stability of the soft magnet properties of the alloy.

Abstract: A Magneto-Optical disk having a transparent substrate, a Magneto-Optical film formed on the transparent substrate and a high corrosion-resistant film laminated on the Magneto-Optical film. The Magneto-Optical film is made of a perpendicular magnetic anisotropy material, the corrosion-resistant film is made of a metal or metal alloy. A foundation protecting layer may be formed on the transparent substrate with the Magneto-Optical film and the corrosion resistant film formed thereon. The Magneto-Optical film may be a plurality of films laminated alternately with a plurality of corrosion-resistant films.