Abstract: A region (21) having different magnetic energy from that of other portion is formed in a layer (1b) of soft magnetic material which has an easy axis of magnetization normal to the layer surface and is magnetized in one direction by applying an external bias magnetic field. By irradiating a light beam on the layer surface, a cylindrical magnetic domain b magnetized in the direction opposite to the magnetization direction is formed at a first stable position of the region (21). This cylindrical magnetic domain is moved to a second stable position by a second cylindrical magnetic domain c.multidot.b formed by the irradiation of light beam or by a temperature gradient whereby stable recording, reading thereof and accurate calculation function can be carried out.

Abstract: A tuned oscillator is disclosed which comprises an active element, a resonator electrically connected to the active element and made of a magnetic material using ferro-magnetic resonance phenomenon, and a magnetic circuit for applying a magnetic field to the resonator. The resonator is made of an YIG (yttrium, iron and garnet) thin film magnetic resonance element formed by a thin film forming technique and utilizes an uniform mode ferro-magnetic resonance in the YIG thin film, and operating under the application of magnetic field of the magnetic circuit.

Abstract: A process for producing alpha,beta-unsaturated ketones represented by the following general formula ##STR1## wherein R.sub.1 represents a hydrocarbon radical, R.sub.2 represents an organic radical bonded through a carbon-carbon bond, R.sub.3 and R.sub.4 represent a hydrogen atom or a hydrocarbon radical, and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be straight-chained or form a ring in arbitrary combinations,which comprises contacting an alpha-disubstituted-beta-keto acid ester represented by the general formula ##STR2## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are as defined, and R.sub.5, R.sub.6, R.sub.7 and R.sub.8 represent a hydrogen atom or a hydrocarbon radical,with a catalyst consisting essentially of (a) a compound of a platinum-group metal and optionally (b) a monodentate ligand (b).

Abstract: Commercial process for the production of hot-dip aluminum coated steel strip or sheet having improved strength and oxidation resistance at elevated temperatures wherein a Ti containing extremely low carbon Si-Mn steel is used as a steel substrate for hot-dip coating and wherein in the hot rolling step in the manufacture of the steel substrate the temperature of the hot rolled material being coiled is controlled low enough to provide steel surfaces substantially free from internal oxidation at the end of the descaling step.

Abstract: A pick-up device for reading out information which has been recorded on a magnetic medium. The device comprises a substrate and a layer of soft magnetic material overlying a surface of the substrate, the easy axis or direction of magnetization being normal to the surface and the magnetic material having properties capable of having magnetic bubble domains generated and propagated therein, so that when the pick-up device is used to read out information from a magnetic medium, patterns of magnetic domains are formed in the layer of magnetic material corresponding to the patterns of the recorded information. Although the magnetic material is of the type capable of having magnetic bubble domains generated and propagated therein, there is no need to provide the usual bias field for maintaining the bubble domains or for providing domain-transport or domain-annihilating fields.