Abstract: A method comprises: bonding a plurality of thin film piezoelectric elements, formed on a substrate, onto a temporary fixing substrate via an adhesive layer; selectively removing the substrate to expose the thin film piezoelectric elements; fixing an element housing jig having sectional regions for individually isolating the thin film piezoelectric elements in such manner that the thin film piezoelectric elements and the sectional regions correspond to each other; and dissolving and removing the adhesive layer, and housing the thin film piezoelectric elements in the sectional regions of the element housing jig. Accordingly, it is possible to individually isolate and house the thin film piezoelectric elements removed from the substrate.

Abstract: A method comprises: bonding a plurality of thin film piezoelectric elements, formed on a substrate, onto a temporary fixing substrate via an adhesive layer; selectively removing the substrate to expose the thin film piezoelectric elements; fixing an element housing jig having sectional regions for individually isolating the thin film piezoelectric elements in such manner that the thin film piezoelectric elements and the sectional regions correspond to each other; and dissolving and removing the adhesive layer, and housing the thin film piezoelectric elements in the sectional regions of the element housing jig. Accordingly, it is possible to individually isolate and house the thin film piezoelectric elements removed from the substrate.

Abstract: The present invention provides a magnetic film expressed by a composition formula TaMbXcNdOe (T is a magnetic metal such as Fe, M is an alkaline earth metal such as Be, Mg, and Ca, and X is at least one selected from the group consisting of Y, Ti, Zr, Hf, V, Nb, Ta and lanthanoid), where a+b+c+d+e=100, 45 ≦a≦85, 5.5≦b≦28, 0.5≦c≦16, 6≦b+c≦28.5, 0.4 <b/c ≦56, 0≦d≦10, and 8≦d+e≦40. The magnetic film comprises mainly metal magnetic crystal grains having an average crystal grain diameter of not more than 15 nm and a grain boundary product. The grain boundary product substantially separates the metal magnetic crystal grains. The main component of the metal magnetic crystal grains is the T. The grain boundary product contains at least an oxide or a nitride of the M and the X. The magnetic film has a saturation magnetic flux density of not less than 0.8 T and an electric resistivity of not less than 80 &mgr;&OHgr;cm.

Abstract: A composite magnetic head having a recording/playback head and an erasing head combined in one unit through a nonmagnetic material is constructed such that at least one of two core halves constituting the erasing head adjacent to the recording and reproducing head is made of single crystal ferrite, a plane (100) of the single crystal ferrite is substantially parallel to a principal magnetic path-forming plane, and an angle .theta. between an orientation <100> existing in the plane (100) and an operating gap (magnetic gap)-forming plane is in the range of 10.degree.-40.degree. or 80.degree.-120.degree.. The composite magnetic head thus constructed can be made to have a reduced distance between magnetic gaps of both heads so as to be suited for being attached to the compact high-density recording and reproducing apparatus while eliminating crosstalk.

Abstract: A magnetic head for write and read of information, the core of which is at least in part composed of magnetic metal thin layers and non-magnetic intermediate metal oxide layers alternately laminated is provided. The metal is a cobalt base amorphous alloy or permalloy and the metal oxide is selected from SiO, Al.sub.2 O.sub.3, MgO and BaTiO.sub.3, which has a Vickers hardness of not less than 200 to less than 1,200. The use of the magnetic head does not injure a magnetic recording medium and contributes to improvement of the durability of the magnetic recording medium.

Abstract: In manufacturing a magnetic head having a magnetic circuit formed of magnetic material in which anisotropy can be induced, the magnetic head is processed by a first annealing process in a magnetic field for inducing anisotropy to generate an axis of easy magnetization in one direction in a part of the magnetic material, subsequently the magnetic head is processed by a second annealing process for annealing the magnetic material, applying the magnetic field in one of the directions perpendicular to the axis of the easy magnetization so as to relax the anisotropy induced by the first annealing process.