494 results about "Non magnetic" patented technology

According to one embodiment, a magnetic head includes a first magnetic pole, a second magnetic pole, and a magnetic element provided between the first and the second magnetic poles. The magnetic element includes first to fourth magnetic layers, and first to fifth non-magnetic layers. The fourth magnetic layer includes a first element and at least one of Fe, Co or Ni. The first element including at least one selected from the group consisting of Cr, V, Mn, Ti, N and Sc. The fourth non-magnetic layer including at least one selected from the group consisting of Cu, Au, Cr, Al, V and Ag. The fifth non-magnetic layer includes at least one selected from the group consisting of Cu, Au, Cr, Al, V and Ag.

An electric component having electric coils, the component formed by 3D printing of at least three different 3D-printed materials with spatial distributions yielding open magnetic circuit configuration of one of the electric coils. The electric component having a bulk formed by non-magnetic and dielectric 3D printed material; and an electric coil of the open magnetic circuit configuration, 3D-printed in the bulk. A magnetic channel of magnetic material 3D-printed in the bulk forming magnetic core of the electric coil; and an electric channel forming an inductor of the electric coil having conductive material 3D-printed in the bulk with a coil / helical geometry having electrically connected conductive windings arranged to circumference the magnetic channel, which is configured and operable with the open magnetic circuit configuration and has magnetic material occupying a central region of the coil / helical geometry of the inductor while not enclosing the windings with a closed loop of the magnetic material.

According to one embodiment, a magnetic head includes a reproducing section. The reproducing section includes a first shield, a second shield, a third shield, a fourth shield, a first magnetic layer, a first intermediate layer, and a second intermediate layer. A second direction from the third shield to the fourth shield crosses a first direction from the first shield to the second shield. The first magnetic layer is provided between the first shield and the second shield and between the third shield and the fourth shield. The first intermediate layer is provided between the first shield and the first magnetic layer, and is nonmagnetic. The second intermediate layer is provided between the first magnetic layer and the second shield, and is nonmagnetic. The second intermediate layer length of the second intermediate layer is shorter than a first intermediate layer length of the first intermediate layer along the second direction.

Resonators for use in a transcutaneous energy transfer system (TETS) are provided. A resonator includes a housing, a magnetic core positioned within the housing, the magnetic core defining an annular groove and a central aperture, a coil element positioned within the annular groove, and at least one layer positioned within the central aperture, the at least one layer comprising a non-magnetic, non-metallic material.

The utility model discloses a magnetic leveling device of a pendulum bob type laser demarcation device, which comprises a hanging bracket and a pendulum body hung in the hanging bracket, a magnetic damping body consisting of a plurality of magnets is arranged on the hanging bracket according to a Halbach array, and a magnetic field which is made of non-magnetic conductive materials and can cut magnetic lines in a magnetic field generated by the magnetic damping body is arranged on the pendulum body. The utility model aims to provide a damping piece which adopts two different forms of Halbach arrays to generate magnetic damping, and compared with the existing common magnet arrangement scheme, the magnetic flux is obviously enhanced, so that a stronger magnetic damping effect is generated, and the magnetic damping effect is improved. The magnetic leveling device can effectively prevent the swinging body from swinging excessively, so that the leveling time is effectively shortened, the leveling speed and precision of the laser demarcation device are further improved, and the working efficiency is remarkably improved.

The invention provides a magnetic heterojunction structure for current-spin current conversion, a spin electronic device and a preparation method. The magnetic heterojunction structure comprises a substrate, a first electrode, a second electrode, a third electrode and a fourth electrode, the magnetic heterojunction is formed on the substrate, the magnetic heterojunction comprises a ferromagnetic layer and a non-magnetic layer, and the non-magnetic layer is an alloy layer formed by a material of a group IIIA element and a material of a group VA element in a periodic table of elements; wherein the ferromagnetic layer has perpendicular magnetic anisotropy. Compared with the prior art, the method has the advantages that a high-quality magnetic heterojunction structure can be obtained by using the prepared high-quality III-V group alloy film by utilizing the contribution of the spin current from the P orbit, so that a high-quality electronic device is obtained, a way is opened up for improving the spin current efficiency, and the range of materials which can be applied to spintronics is expanded.

The invention relates to the technical field of electromagnetic characterization, in particular to a stable non-iterative electromagnetic parameter characterization method based on a transmission reflection method and a clamp, and the method comprises the steps: S1, loading a to-be-measured medium into a measurement clamp, dividing the measurement clamp into a to-be-measured medium region and an air region, and enabling the two regions to be equivalent to a two-port network; s2, measuring a scattering parameter S of two ports in the two-port network, and converting the scattering parameter S into an ABCD matrix form; s3, calculating an initial ABCD matrix of the to-be-measured medium according to the total ABCD matrix of the measurement clamp and the ABCD matrix of the air section; s4, calibrating the initial ABCD matrix of the to-be-detected medium, eliminating the influence of an air section, and obtaining a final ABCD matrix of the to-be-detected medium; and S5, converting the final ABCD matrix of the to-be-measured medium back to the scattering parameter S. The method is suitable for various magnetic and non-magnetic materials, and is still effective for materials with complex dielectric constant and magnetic conductivity dependent on frequency.

The present invention belongs to the technical field of magnetic materials, and particularly relates to a high-frequency magnetic composite material, a high-frequency magnetic device and a processing method thereof. Among them, the processing method of the high-frequency magnetic composite material includes: mixing magnetic metal particles with a magnetic vortex structure, a solvent and a non-magnetic ceramic phase material and grinding them into a slurry; placing the slurry in a mold and forming it under a low-temperature and low-pressure process; wherein, the conditions of the low-temperature and low-pressure process are that the temperature is lower than 300 °C and the pressure is less than 500 MPa. By using magnetic particles with a magnetic vortex structure, there are no magnetic domain walls in the present invention. At high frequencies, magnetization mainly occurs through magnetization rotation, rather than the traditional domain wall displacement mechanism, which can significantly increase the working frequency of the material to above 100 MHz; in addition, the low-temperature and low-pressure process is adopted to avoid various defects of extreme conditions such as high temperature and high pressure in the traditional process.

The invention provides a permanent magnet dry magnetic separator with upper and lower rollers, and belongs to the technical field of magnetic separation equipment. The permanent magnet dry magnetic separator comprises a shell, a first magnetic separation area, a second magnetic separation area, an L-shaped port, an upper magnetic separation roller, a material guide area, a feeding unit, a first conveying channel, a second conveying channel, a lower magnetic separation roller, a first discharge port and a second discharge port, the upper magnetic separation roller and the lower magnetic separation roller are distributed in the shell, multiple times of magnetic separation treatment on materials are achieved, effective separation of the magnetic materials is guaranteed, interference of non-magnetic materials is reduced, meanwhile, the reciprocating shaking design of the feeding hopper and the material guiding shell is adopted, and the magnetic separation effect is improved. By means of the design, materials can evenly fall into a magnetic separation area, the magnetic separation efficiency is further improved, in addition, the materials can be air-dried in the reciprocating shaking process, the influence of wet materials on the magnetic separation effect is effectively avoided, and therefore effective separation of magnetic substances and non-magnetic substances is guaranteed.

The composite force field magnetic separation column comprises a separation cone frustum, the separation cone frustum is of a hollow structure, and a magnet device and a rotating shaft are arranged in the separation cone frustum; the magnet device is cylindrical and is arranged between the sorting cone frustum and the rotating shaft, and the rotating shaft is movably connected with the magnet device; a sorting screw is wound on the outer side of the sorting cone frustum, a blade of the sorting screw is fixedly connected with the rotating shaft, and the sorting screw can rotate relative to the sorting cone frustum; the bottom of the rotating shaft is connected with the transmission device and used for driving the sorting screw to rotate. The bottom of the sorting spiral is close to the feeding belt, and materials on the feeding belt are conveyed upwards through rotation of the sorting spiral. And an air blowing device is arranged on one side of the separation screw, so that non-magnetic materials or weakly magnetic materials on the separation cone frustum or the separation screw are blown away from the separation screw, fall to a tailing falling area and are taken away from a working area through a tailing belt, and magnetic concentrate products at the uppermost end of the separation screw are conveyed to a concentrate product area through a concentrate belt.

[Object] To provide a Peltier element with an ultra-low thermal resistance heat flux sensor that is capable of detecting heat flow passing through the Peltier element at high speed and has negligible thermal resistance.[Solving Means] It has a structure in which an anomalous Nernst heat flux sensor 20 is formed directly on one or both of an upper part and a lower part of an insulating board that forms a Peltier element 10. The present invention is favorably characterized in that each fine line (22a) of a thermoelectric generator is formed of a magnetic material having residual magnetization even in absence of an external magnetic field and is magnetized in a direction orthogonal to a length direction of the fine line, and each fine line (23a) of a connector is formed of a ferromagnetic material that is magnetized in a direction opposite to a direction in which each fine line (22a) is magnetized, a magnetic material having a Nernst coefficient with an opposite sign to that of each fine line (22a), or a non-magnetic material.

Provided are a method and device for driving movement of a target object by a gravitational field generated by a varying electromagnetic field which relate to the technical field of physics. The method includes: generating, by a variable electromagnetic field generator, a time-varying electromagnetic field in space where a target is located; adjusting a frequency, amplitude and phase of the time-varying electromagnetic field so as to generate an effect of a varying magnetic field in the space; and based on the time-varying electromagnetic field, generating an acting force on the target object to drive the target object to move along a predetermined trajectory or direction. The present invention breaks through limitation that the traditional electromagnetic mechanics can only drive metal materials, utilizes the varying characteristics of the electromagnetic field to drive and realize accurate control of movement of all objects comprising a non-magnetic substance and a non-conductive substance.

The assembly disclosed herein is to attach a mast used by an off-road vehicle to the off-road vehicle itself using a mount assembly and a base assembly. The mount assembly is formed for the most part from non-magnetic materials is attached to an off-road vehicle by a ferromagnetic bolt at its proximal end. The base assembly is inserted into the mount assembly's open distal end the base assembly having a magnet attached to its proximal end that attracts the ferromagnetic bolt in the mount assembly and an opening at its distal end to receive an adapter that is connected to a mast. The proximal end of the base assembly having a surface effect that is received by the ferromagnetic bolt to prevent base assembly from rotating within the mount assembly.

The present disclosure generally relates to a magnetic media drive comprising a magnetic recording head. The magnetic recording head comprises a main pole disposed at a media facing surface (MFS), a shield disposed at the MFS, a spin blocking layer disposed between the shield and the main pole, at least one non-magnetic layer disposed between the main pole and the shield, the at least one non-magnetic layer being disposed at the MFS, and at least one spin orbit torque (SOT) layer disposed over the at least one non-magnetic layer, the SOT layer being recessed a distance of about 20 nm to about 100 nm from the MFS. A ratio of a length of the SOT layer to a thickness of the SOT layer is greater than 1. The at least one SOT layer comprises BiSb.

The invention discloses a magnetic anisotropy quantitative method and system for detecting terahertz signals based on a rotating magnetic field, and the method comprises the steps: (1), obtaining a to-be-detected magnetic / non-magnetic material film which comprises at least one non-magnetic film layer with strong spin-charge flow conversion and at least one magnetic film layer; (2) transmitting femtosecond laser pumping pulse to the magnetic / non-magnetic material film to be detected, and radiating terahertz waves; (3) applying a magnetic field to the magnetic / non-magnetic material film to be tested; (4) setting the relative time delay of the femtosecond laser detection pulse and the femtosecond laser pumping pulse to the signal position of the terahertz wave, continuously rotating the angle of applying the magnetic field, and detecting terahertz wave signals at different magnetic field angles through the femtosecond laser detection pulse; and (5) calculating to obtain the magnetic anisotropy field of the magnetic thin film layer according to the terahertz wave signals under different magnetic field angles. The method does not need to contact a sample for measurement, does not need to carry out micro-nano processing on a detection material, is simple in preparation and test processes, and can realize nondestructive detection.

The invention relates to a cerium-iron-boron permanent magnet material with low content of a non-magnetic phase CeFe2 and a preparation method of the cerium-iron-boron permanent magnet material. The cerium-iron-boron permanent magnet material is composed of the following components in percentage by atom: 11%-17% of Ce, 70%-80% of Fe, 5%-10% of B, 0.1%-3% of Co, 0.1%-3% of Zr and 0.1%-5% of La. The preparation method comprises the following steps of S1, smelting, wherein Ce, La, Fe, Co, Zr and FeB are prepared into a CeLaFeCoZrB alloy cast ingot through electric arc smelting according to the atomic percent composition; s2, melt-spinning: crushing the CeLaFeCoZrB alloy ingot prepared in the S1, and then preparing an alloy strip by using a melt rapid quenching method; and S3, magnetic field annealing: performing vacuum annealing on the alloy strip prepared in S2, wherein the annealing temperature is 2-12K below the Curie temperature Tc of the alloy. Compared with the prior art, the method has the advantages that the phase volume fraction of the non-magnetic CeFe2 phase in the cerium-iron-boron permanent magnet material alloy is remarkably reduced, and the residual magnetism and the maximum magnetic energy product of the alloy are improved.

In a coil component, a non-magnetic part is bridged between a first coil and a second coil in a cross section of an element body. Therefore, a magnetic flux in a direction along a magnetic core of the first coil and a magnetic core of the second coil is hindered by the non-magnetic part between the first coil and the second coil. Accordingly, a magnetic flux of the first coil and a magnetic flux of the second coil are difficult to interfere with each other.

The invention belongs to the technical field of non-magnetic material nondestructive testing, and discloses a non-ferromagnetic material thickness and conductivity synchronous measurement method based on eddy current phase characteristics, and the method comprises the specific steps: S1, estimating the conductivity and thickness range of a to-be-tested piece based on data such as a product specification or an industrial standard; s2, determining excitation frequency according to a frequency selection criterion (high frequency enables the skin effect depth to be smaller than 1 / 3 of the thickness, and low frequency enables the skin effect depth to be larger than two times of the thickness of the sample); s3, an eddy current method is adopted to obtain the impedance variable quantity phase of the to-be-measured non-ferromagnetic material; and S4, substituting the phases into corresponding simplified model formulas respectively, and obtaining the conductivity and the thickness at the same time. Aiming at the problems of multiple calibration, blindness in excitation frequency selection, low single-parameter measurement efficiency and the like in conductivity or thickness measurement by an existing eddy current method, double-parameter output of single measurement is realized, multiple calibration and inversion calculation are not needed, the calculation is simple, rapid and accurate, the hardware cost is low, and the applicability is wide.

The present disclosure generally relates to a magnetic recording head comprising a read head. The read head comprises a sensor disposed at a media facing surface (MFS) and a spin generator spaced from the sensor and recessed from the MFS. The sensor and spin generators are disposed on a non-magnetic layer. The sensor comprises a free layer and the spin generator comprises at least one spin orbit torque (SOT) layer. The SOT layer may comprise topological material such as BiSb. The sensor is configured to detect a read signal using a first voltage lead and a second voltage lead. The spin generator is configured to inject spin current through the non-magnetic layer to the sensor using a first current lead and a second current lead. The shape of the non-magnetic layer is a triangular or trapezoidal shape to further concentrate spin current.

The invention discloses a non-magnetic sheet separator, an application method and non-magnetic sheet layering equipment, the non-magnetic sheet separator comprises a separator body, a moving part is arranged in the separator body, the moving part is provided with a separation rack, a driving part is connected with the moving part and pushes the moving part to move along a track in the separator body, and the separation rack is arranged on the moving part. According to the sheet metal separating device, the moving part pushes the moving part to move along the track in the separating device body, the rack matched with the thickness of the sheet metal is arranged on the moving part, the sheet metal is separated through the rack, and the sheet metal separating device further comprises an integrated air knife, and in the process that the moving part separates the sheet metal, an electromagnetic valve of the integrated air knife is powered on to work so that the integrated air knife can blow air to a sheet stack in an auxiliary mode. The moving part works according to the internal track of the separator, in this way, the moving part can push away the uppermost plate in the plates every time, when one gap is pushed away, the air knife blows air to the gap, vacuum between the plates is destroyed, and only the uppermost plate can be taken after the plates are taken.

There is provided a stacked film that allows flowing a write current and achieves a high-density and / or high-speed memory and a magnetoresistive effect element using the stacked film. A magnetic stacked film 10 is formed of a three-layered structure that includes a first ferromagnetic layer 12, an antiferromagnetic coupling layer 10a provided on the first ferromagnetic layer 12, and a second ferromagnetic layer 16 provided on the antiferromagnetic coupling layer 10a. The antiferromagnetic coupling layer 10a includes a first non-magnetic layer 13, an interlayer coupling layer 14, and a second non-magnetic layer 15. The interlayer coupling layer 14 is selected from a metal or an alloy including at least any one of Ir, Ru, and Rh. The first non-magnetic layer 13 and the second non-magnetic layer 15 are selected from a metal or an alloy including Pt.

The invention relates to the technical field of medical equipment electromagnetic compatibility performance detection, in particular to a hand controller electromagnetic environment pressing experiment device which comprises a control box, a Z-axis driving mechanism, a pressing device, an X-axis driving mechanism and a Y-axis driving mechanism. Control hardware is arranged in the control box; the two X-axis driving mechanisms are symmetrically arranged, the Y-axis driving mechanisms are arranged at the output ends of the two X-axis driving mechanisms, and the Z-axis driving mechanisms are arranged at the output ends of the Y-axis driving mechanisms; and the pressing device is arranged on the output end of the Z-axis driving mechanism and is used for realizing simulated pressing operation of the hand controller key. By adopting a completely non-magnetic material and a non-magnetic actuation principle, stable operation of the detection device in an electromagnetic environment is realized, the device not only can accurately position a key of the hand controller, but also can simulate a pressing operation in a real use scene, provides reliable technical guarantee for anti-interference performance detection of the hand controller, and is suitable for popularization and application. And the blank of the application of the existing detection technology in the electromagnetic environment is effectively filled.

To provide a wire rod which can suppress breakage during bending and maintain non-magnetic properties even after bending.SOLUTION: Provided is a wire rod having a chemical composition consisting of, by mass%, C: 0.50 to 1.10%, Si: 0.10 to 1.00%, Mn: 10.00 to 18.00%, P: 0.050% or less, S: 0.050% or less, and N: 0.005 to 0.035%, and the balance being Fe and impurities; wherein, in a cross section perpendicular to a length direction of the wire rod, the austenite structure has an area ratio of 98.00% or more and less than 100.00%, the carbide in the center has an area ratio of 0.05 to 2.00%, and the carbon segregation degree of the center segregation portion is 1.20 or less.SELECTED DRAWING: None

The invention discloses a FeNi soft magnetic composite material based on tetrabutyl orthosilicate hydrolysis coating and a preparation method of the FeNi soft magnetic composite material. According to the method, through a controllable sol-gel process, tetrabutyl orthosilicate is hydrolyzed to generate SiO2 gel, then a uniform and ultrathin SiO2 gel layer is generated on the surface of FeNi powder in situ, and then heat treatment densification is performed to obtain the FeNi soft magnetic composite material coated with SiO2 in an insulation mode. The SiO2 insulating layer is firmly combined with the matrix metal powder, the thermal stability is good, high frequency and high resistivity are achieved, and meanwhile dilution of non-magnetic relative magnetic performance is reduced to a great extent. The final magnetic core is obtained through compression molding and annealing heat treatment, has the excellent characteristics of high effective magnetic conductivity and low high-frequency magnetic core loss, and is particularly suitable for various efficient and miniaturized power electronic devices in the MHz frequency band.

A device with adjustable exchange bias based on a low-dimensional antiferromagnetic / ferromagnetic insulator heterojunction. A device with adjustable exchange bias based on a low-dimensional antiferromagnetic / ferromagnetic insulator heterojunction. (1) A heterojunction is formed by covering an antiferromagnetic topological insulator with a low-dimensional ferromagnetic insulator; there are two configurations of the heterojunction, namely, the ferromagnetic insulator completely covering the antiferromagnetic topological insulator and the ferromagnetic insulator semi-covering the antiferromagnetic topological insulator; (2) A non-magnetic insulating protective layer is covered above the heterojunction; (3) In the heterojunction, an obvious exchange bias effect can be observed; (4) By changing the coverage range of the ferromagnetic insulator, the sign of the exchange bias can be regulated; (5) The material system used for the device is van der Waals layered materials; by changing the coverage range of the ferromagnetic insulator, the sign of the exchange bias can be regulated; below the Curie temperature and Néel temperature of the magnetic material, the anomalous Hall effect can be measured by using low temperature and magnetic field for magnetotransport measurement.

The invention provides a two-dimensional material solar hydrogen production efficiency prediction method and device based on machine learning. The method comprises the following steps: reading a non-magnetic hexagonal crystal system single-layer material in a database to construct an initial data set; for samples with complete labels in the data set, training a single-layer material band edge position prediction model by adopting a feature engineering and gradient boosting decision tree algorithm; next, predicting and complementing samples with missing labels by using the trained model so as to generate a complete data set and further construct heterojunction double layers; carrying out data enhancement on a heterojunction sample of literature investigation through a CVAE-GAN hybrid architecture, and optimizing a feature vector; then training the new model by adopting a random forest algorithm to realize accurate prediction of the band edge position of the previously constructed heterojunction; and finally, the heterojunction type is judged in combination with a work function and a band edge position, the solar hydrogen production efficiency is calculated in batches by utilizing a program, and a high-efficiency heterojunction material is screened out.

To provide a magnetic head with improved spintronic devices.SOLUTION: The present invention relates to a magnetic recording head having a local or non-local SOT spintronic device for a magnetic medium, such as a magnetic media drive. In the case of the magnetic recording head having a local SOT spintronic device, a main pole, a shield, a buffer layer disposed on the main pole, a spin Hall layer disposed on the buffer layer, and an intermediate layer disposed on the spin Hall layer are included, and the buffer layer is made of a predetermined material. In the case of the magnetic recording head 1300 having a non-local SOT spintronic device, a main magnetic pole 1302, a shield 1304, a spin blocking layer 1310, a non-magnetic layer, and a spin-orbit-torque (SOT) layer 1308 are included, and the SOT layer is recessed from a medium facing surface (MFS) by a distance of about 20 nm to about 100 nm. The ratio of the length of the SOT layer to the thickness of the SOT layer is greater than 1. The SOT layer consists of BiSb.SELECTED DRAWING: Figure 10A

Provided is a magnetic storage element comprising a first stack composed of: a storage layer formed from a ferromagnetic body; a first fixed layer formed from a ferromagnetic body; a first spacer layer that is sandwiched by the storage layer and the first fixed layer, and that causes antiferromagnetic exchange coupling between the storage layer and the first fixed layer; and a tunnel barrier layer that is provided to the opposite-side surface of the storage layer from the first spacer layer and that is formed of a non-magnetic body. The first stack is sandwiched by a first electrode and a second electrode.

A pole-piece unit of a magnetic gear includes a pole-piece support body having a connection part that is connected to each end of a plurality of pole pieces, and a radially extending part that extends from the connection part toward an inner side in a radial direction. A first yoke unit includes an end plate that is disposed on an end surface of a first body part in an axial direction, and faces the radially extending part with a predetermined gap therebetween in the axial direction. The end plate has a magnetic material part that is made of a magnetic material, and a non-magnetic material part that is made of a non-magnetic material and disposed on an outer side in the radial direction relative to the magnetic material part.