31 results about "Amorphous magnetic material" patented technology

An electric rotating machine having permanent magnets comprising a rotor having a plurality of permanent magnets, a stator iron core disposed in opposite relation with the rotor, and a stator winding wound around the stator core, wherein the stator core is constituted by a yoke and a plurality of teeth portions disposed to the yoke. The teeth portions are projected towards the inner periphery of the rotor. The teeth portions is made of amorphous magnetic material.

In a spin tunnel magnetoresistive effect film in which a magnetic thin film to which an exchange bias is applied by exchange coupling via an anti-ferromagnetic thin film and a magnetic thin film that detects a magnetic field are laminated, a magnetic thin film or an anti-ferromagnetic thin film (PtMn, PdMn, NiMn) is laminated onto an underlayer (Ta, Zr, Hf), the surface roughness thereof being in the range from 0.1 to 5 Angstroms. A means used to control the surface roughness introduces into the film growing chamber oxygen, nitrogen, hydrogen, or a gas mixture thereof into a vacuum of 10−6 Torr to 10−9 Torr, reduces the substrate temperature to 0° C. or lower during film growth, or oxidizes an underlayer. The lower electrode layer material used is a film laminate of a high-permeability amorphous magnetic material and a non-magnetic metallic layer.

In a method of diagnosing the fatigue life of structural steelwork according to the present invention, a Barkhausen noise measurement is performed under the condition of 5 mu m< / =d< / =1 mm where d is the detection depth of Barkhausen noise, by using a magnetic head constituted by an air-core coil detection head and a magnetic excitation head obtained by winding a copper wire such as an enameled wire on a U-shaped core made of a soft magnetic material such as a silicon steel sheet or an amorphous magnetic material. The degree of fatigue damage of a target measurement portion is diagnosed using the root-mean-square (RMS) voltage or voltage amplitude value of the Barkhausen noise. According to this method, the degree of fatigue and degradation by stress and strain in the structural steelwork can be accurately diagnosed prior to development of cracking without any limitation on diagnostic locations. A member of steelwork having a life diagnostic function is obtained by mounting the above magnetic head on a brace- or wall-like vibration-damping device made of very low-yield steel. According to this member of steelwork, the wall or covering material of a bridge or the like need not be removed even in practicing a fatigue life diagnosis. The degree of fatigue degradation in structural steelwork can be easily and accurately diagnosed prior to development of cracking even in a location where an operator cannot access due to the structural limitation.

This invention aims to provide a communication device, installation structure for the communication device, a method of manufacturing the communication device, and a method of communication with the communication device in which the communication device is able to exceedingly restain a conductive material from attenuating magnetic flux and to expand communication distance even when the communication device is attached to a conductive member e.g., metal, in a closely contacting manner. An RFID tag serving as a communication device is characterized in that an amorphous magnetic sheet extends from a magnetic flux generation portion of a concentric display antenna coil of the RFID tag toward the outside of the antenna coil.

In a spin tunnel magnetoresistive effect film in which a magnetic thin film to which an exchange bias is applied by exchange coupling via an anti-ferromagnetic thin film and a magnetic thin film that detects a magnetic field are laminated, a magnetic thin film or an anti-ferromagnetic thin film (PtMn, PdMn, NiMn) is laminated onto an underlayer (Ta, Zr, Hf), the surface roughness thereof being in the range from 0.1 to 5 Angstroms. A means used to control the surface roughness introduces into the film growing chamber oxygen, nitrogen, hydrogen, or a gas mixture thereof into a vacuum of 10−6 Torr to 10−9 Torr, reduces the substrate temperature to 0° C. or lower during film growth, or oxidizes an underlayer. The lower electrode layer material used is a film laminate of a high-permeability amorphous magnetic material and a non-magnetic metallic layer.

An electric rotating machine having permanent magnets having a rotor having a plurality of permanent magnets, a stator iron core disposed in opposite relation with the rotor, and a stator winding wound around the stator core, wherein the stator core is constituted by a yoke and a plurality of teeth portions disposed to the yoke. The teeth portions are projected towards the inner periphery of the rotor. The teeth portions are made of amorphous magnetic material.

An underlying layer is composed of Co—Fe—B that is an amorphous magnetic material. Thus, the upper surface of the underlying layer can be taken as a lower shield layer-side reference position for obtaining a gap length (GL) between upper and lower shields, resulting in a narrower gap than before. In addition, since the underlying layer has an amorphous structure, the underlying layer does not adversely affect the crystalline orientation of individual layers to be formed thereon, and the surface of the underlying layer has good planarizability. Accordingly, PW50 (half-amplitude pulse width) and SN ratio can be improved more than before without causing a decrease in rate of change in resistance (Δ R / R) or the like, thereby achieving a structure suitable for increasing recording density.

The invention discloses a heat conducting oil circular cooling system made of for amorphous magnetic materials, comprising a heat conducting oil cooling roller, a cooling roller rotating shaft and a heat conducting oil cooling tank, wherein the two ends of the axis of the cooling roller rotating shaft are coaxially connected with a heat conducting oil input pipe and a heat conducting oil output pipe, the heat conducting oil cooling roller is provided with a heat conducting oil cooling passage for enabling the heat conducting oil input pipe and the heat conducting oil output pipe to communicatewith each other, the heat conducting oil input pipe and the heat conducting oil output pipe are connected with the heat conducting oil cooling tank, a liquid nitrogen cooling pipe is arranged in theheat conducting oil cooling tank, one end of the liquid nitrogen cooling pipe is connected with a liquid nitrogen input pipe located outside the heat conducting oil cooling tank, and the other end ofthe liquid nitrogen cooling pipe is connected with a liquid nitrogen output pipe located outside the heat conducting oil cooling tank. The heat conducting oil circular cooling system made of amorphousmagnetic material further improves the cooling efficiency of the cooling roller to improve the production efficiency of amorphous alloy magnetic strips.

The invention provides an amorphous magnetic shielding board for a transformer and a processing method thereof. The processing method comprises the following steps of: cutting an amorphous strip into amorphous magnetic boards in a needed size; then, sequentially overlapping several amorphous magnetic boards in a positive and negative opposition mode into an amorphous overlapping sheet and fixing the amorphous overlapping sheet with a clamp; and after annealing and curing the amorphous overlapping sheet in vacuum, coating the periphery of the amorphous overlapping sheet with an insulated paper board to form an amorphous magnetic shielding board. The amorphous magnetic shielding board made of amorphous magnetic material has the advantages of favorable magnetism-conducting performance, small size and light weight, can effectively reduce the vortex loss and the circuit loss of a transformer and can save energy approximate 25 percent.

The present invention is intended to provide a magnet apparatus obviating the necessity of shield coils designed to suppress eddy currents. The magnet apparatus has gradient coils disposed in a bore of a cylindrical superconducting magnet, and includes a cylindrical structure that is realized with a combination of tiles made of a high-permeability material and that is interposed between the internal surface of the superconducting magnet and the external surface of the gradient coils. The tiles made of a high-permeability material are laminates made of a high-permeability material. The high-permeability material is a silicon steel plate or an amorphous magnetic material.

A powder core includes: a powder of a crystalline magnetic material; and a powder of an amorphous magnetic material, in which a median diameter D50A of the powder of the amorphous magnetic material is 15 μm or less, and satisfies the expression: 1≤D50A / D50C≤3.5 with respect to a median diameter D50C of the powder of the crystalline magnetic material.

A tape format magnetoelastic resonator device comprises a continuous ribbon of amorphous magnetic material having a plurality of separate, hinged magnetoelastic resonator strips formed from the ribbon, linearly displaced along a longitudinal axis of the ribbon, wherein each magnetoelastic resonator strip is configured to couple to an external magnetic field at a particular frequency and convert the magnetic energy into mechanical energy, in the form of oscillations.

The invention discloses a room temperature transparent ferromagnetic semiconductor material and a preparation method thereof, which belong to the technical field of semiconductors. The room temperature transparent ferromagnetic semiconductor is prepared by adding semiconductor functional elements on the basis of an amorphous material with intrinsic room temperature magnetism to prepare a new type of ferromagnetic semiconductor material. The specific embodiment is prepared by magnetron sputtering method, and the semiconductor material composition is obtained as Co x (B a Fe b Ta c ) y o 100-x-y , where x and y are atomic percentages, and the value range is: 10≤x≤40, 19≤y≤55, a>b>c, cy≥3. The material is a direct bandgap semiconductor with an optical bandgap of ~3.6eV, a Curie temperature higher than room temperature (about 163 degrees Celsius), and unique optical, electrical, and magnetic properties. The preparation process is simple, and it is an excellent candidate material for magneto-optical, photoelectric, and room-temperature controllable electronic spin devices such as spin field effect transistors and spin light-emitting diodes.

A magnetic recording medium includes: an underlayer constituted of at least a substrate and a nonmagnetic metal element; and an amorphous magnetic layer, made of amorphous magnetic material, which magnetically records information. In certain example embodiments, the amorphous magnetic layer has bumps on a surface thereof or the magnetic recording medium has bumps on a surface thereof (surface of a lubricating layer) so that density of the bumps is not less than 400 bumps / μm2 or so that height of the bumps is not less than 2% with respect to an average layer thickness of the amorphous magnetic layer. Thus, magnetic wall movement of the amorphous magnetic layer is effectively suppressed, so that it is possible to stably form a recording bit.

Provided is a powder magnetic core containing powder of a crystalline magnetic material and a powder of an amorphous magnetic material. In an inductor including the powder magnetic core, DC superposition characteristics can be improved and iron loss can be reduced. A powder magnetic core (1) comprising a powder of a crystalline magnetic material and a powder of an amorphous magnetic material, wherein the powder of the amorphous magnetic material has a median diameter D50A of 15 μm or less and is compatible with a crystalline magnetic material The median diameter D50C of the powder of the material satisfies the following formula (1), 1≤D50A / D50C≤3.5(1).

The present invention relates to an antenna substrate material, comprising the following components by weight: 5-40 parts of component A, 1-10 parts of component B, 5-40 parts of component C and 30-90 parts of component D; The A component includes at least one of planar hexagonal ferrite and NiZn ferrite; the B component is a soft magnetic metal, and the B component includes pure iron, amorphous magnetic materials, nanocrystalline At least one of magnetic alloy materials, FeSi and FeSiAl; the C component is a dielectric ceramic; the D component has a low tanδ e (Df) resin material. The antenna substrate material of the present invention has the advantages of being able to work at 6GHz, reducing the size of the antenna, good impedance matching performance, wide bandwidth and high antenna efficiency.

The invention relates to the technical field of high-frequency transformers, and particularly relates to an amorphous magnetic material high-frequency transformer iron core and a manufacturing method thereof. The amorphous magnetic material high-frequency transformer iron core comprises a plurality of same amorphous magnetic material sheets, the amorphous magnetic material sheets are stacked into an amorphous magnetic material block, and the contact surfaces of every two adjacent amorphous magnetic material sheets are coated with a thermosetting resin composition. The manufacturing process comprises the working procedures of strip shearing, iron core forming, heating curing, cutting, grinding, forming and the like, on one hand, the amorphous magnetic material high-frequency transformer iron core can improve the working magnetic flux density applied to a high-frequency transformer of 10 kHz to 200 kHz, the power density of the high-frequency transformer is remarkably improved, and equipment miniaturization is facilitated; and on the other hand, the amorphous material has better toughness than ferrite and is not easy to damage in the transportation and use processes so that the reliability of equipment is improved.

The invention concerns a method for mass production of a plurality of magnetic sensors (1) produced on a semiconductor substrate (4), said sensors (1) comprising at least a magnetic core (8) made of an amorphous magnetic material. The invention is characterised in that, after integrating electronic circuits associated with the magnetic sensors (1), an amorphous magnetic material film (22) is bonded on the semiconductor substrate (4), said film being obtained from an amorphous magnetic material strip cut out into several sections (18) which are arranged juxtaposed on a support (20), said film being then structured to form the magnetic cores (8) of said magnetic sensors (1), the semiconductor substrate (4) being finally cut out to provide a plurality of individual magnetic sensors (1).