274 results about "Magnetic domain" patented technology

The invention relates to the technical field of control and adjustment, in particular to a steam turbine fault diagnosis system based on multi-parameter fusion monitoring, which is characterized in that a quantum hybrid sensing module is used for establishing a picosecond-level space-time reference through entangled photon pair distribution, and unifying a time sequence label of multi-source heterogeneous data; the hypergraph feature extraction module loads the coefficient to a vibration measurement point vertex attribute channel, dynamically calculates a heat conduction hyperedge weight according to a rotor eccentricity inversion value, aggregates temperature field, vibration spectrum and magnetic domain features in a space-time hypergraph which retains physical topology, outputs a cross-scale aligned fusion feature tensor, and outputs a vibration measurement point vertex attribute channel; generating a diagnosis feature vector to drive a multi-scale twin experience certificate; and the federation decision module triggers a load reduction instruction according to the microscopic crack cloud picture to inhibit thermal stress sudden change, and meanwhile, the feature representation precision is improved through cloud federation optimization hyperedge weight parameters. According to the method, the problem of characterization distortion caused by time sequence asynchronization and scale mismatch of heat and machine coupling data is solved.

According to the displacement modulation and optical assistance-based SERF atom magnetometer magnetic imaging method, an SERF atom magnetometer integrated with a magnetic flux guider is used as a magnetic sensor, and low-frequency magnetic field modulation is introduced to the magnetic sensor by controlling a to-be-tested sample to perform periodic infinitesimal displacement in the sensitive direction of the magnetic sensor; the modulation signal is demodulated by combining a phase-locked amplification technology, and a magnetic response signal subjected to phase-locked demodulation at each spatial position is extracted; constructing a magnetic response matrix through two-dimensional track scanning of micron-order step pitch; an image acquisition module and a reflection optical assembly are introduced for spatial registration so as to monitor the relative position in real time, and the visibility and controllability of the magnetic imaging process are guaranteed; the point-by-point detection of fT-level weak magnetic signals can be realized on the premise that an array structure is not needed; the low-frequency noise interference can be effectively inhibited, the stability and definition of direct-current and low-frequency magnetic field imaging are improved, and the method is suitable for high-resolution space imaging application of weak magnetic sources such as magnetic domain structures, nervous tissue slices and ancient rock samples.

The invention discloses an AMR magnetic resistance unit, an AMR magnetic resistance module, an angle sensor and a chip wherein the AMR magnetic resistance unit comprises: a first AMR magnetic resistance unit; the first AMR magnetic resistance unit comprises a plurality of first AMR magnetic resistance strips, the plurality of first AMR magnetic resistance strips surround a circle center and are distributed in the radial direction, and each first AMR magnetic resistance strip is of a 60-degree arc-shaped strip-shaped structure. According to the AMR magnetic resistance unit, the AMR magnetic resistance module, the angle sensor and the chip, harmonic waves, especially sixth harmonic waves, can be better eliminated, magnetic domain collective hysteresis and noise are reduced, and the anti-eccentricity capacity is improved.

The invention discloses a low-power-consumption winch sensor based on a tunneling magnetoresistance effect. The low-power-consumption winch sensor comprises a measurement module, a signal conversion unit, a shell, a mandrel, a magnetic rotary disc and a detection assembly. The magnetic turntable and the mandrel are connected and rotate synchronously, the detection assembly comprises a TMR sensing element and N magnets, and the magnetic turntable is provided with mounting blind holes for embedding the magnets; the TMR sensing element is arranged on the shell and comprises a mounting plate and two sensing units, the magnetic domain directions of the two sensing units are perpendicular to the rotation axis, magnetic resistance signals of the two sensing units are converted through the signal conversion unit and input into the measuring module, the horizontal distance between the centers of the two sensing units and the magnet and the rotation axis is R, and the center distance L of the two sensing units is smaller than R * sin (180 degrees / N); the sensor is based on the TMR tunneling magnetoresistance effect, is high in detection sensitivity and low in energy consumption, outputs square wave signals with phase differences, can be used for a measurement module to accurately analyze and calculate the rotating speed and the rotating direction of a winch roller, is simple in overall structure, small in radial size and easy to install, and the installation precision is controlled.

The invention discloses an energy-saving control method for a new-energy high-low-voltage direct-current relay. The energy-saving control method comprises the steps of analyzing a mapping relation between a silicon steel sheet stacking angle and a magnetic flux path deviation, calculating magnetic domain wall moving resistance according to magnetic domain boundary stress, determining a magnetic domain overturning speed by combining a magnetic field change rate, and measuring a hysteresis loop width parameter. Adjusting the width and frequency of the excitation current pulse according to the magnetic domain overturning frequency and the hysteresis loop offset and width to obtain an optimized excitation current pulse sequence, and determining the hysteresis loop expansion speed according to the hysteresis loop area change rate; the local high-temperature area temperature is analyzed through the iron core temperature rise rate, the local high-temperature area distribution and the magnetic domain energy dissipation data, if the local high-temperature area temperature exceeds the preset threshold value, the excitation current pulse is adjusted, stable iron core temperature rise control data is obtained, the coercive force change amplitude is determined, the magnetic hysteresis loss and the temperature rise are reduced, the stability of the relay under high-frequency switching is improved, and the reliability of the relay is improved. And the operation efficiency and reliability of the system are greatly improved.

A position measuring device including a first component group and a second component group. The first and second component groups are arranged so as to be movable relative to one another in a measurement direction. The first component group has a domain-wall memory including a domain-wall conductor running in a face. The second component group includes a first magnet and a second magnet. The first and second magnets are arranged end to end in the measurement direction, magnetized such that their magnetization directions run with an orthogonal directional component with respect to the face, and arranged such that they have opposite magnetization directions. The magnets are arranged and configured such that a distance in the measurement direction between the first magnet and the second magnet varies in size along a second direction that is oriented orthogonally to the measurement direction.

To provide a non-heat-resistant magnetic domain refining treatment method capable of predicting a leakage magnetic flux value of a grain-oriented electromagnetic steel sheet after applying magnetic domain refining treatment before applying the magnetic domain refining treatment to the grain-oriented electromagnetic steel sheet.SOLUTION: A non-heat-resistant magnetic domain refining method in which a grain-oriented electrical steel sheet is irradiated with an energy beam to perform non-heat-resistant magnetic domain refining treatment on the grain-oriented electrical steel sheet, the non-heat-resistant magnetic domain refining method comprising: A magnetic flux leakage value prediction step of predicting a magnetic flux leakage value of the grain-oriented electrical steel sheet after being subjected to the magnetic domain refining treatment using a magnetic flux leakage value prediction model learned by machine learning including one or more of surface state parameters of the grain-oriented electrical steel sheet before being subjected to the magnetic domain refining treatment, one or more of environmental condition parameters when being subjected to the magnetic domain refining treatment, and one or more of control parameters of an energy beam when being subjected to the magnetic domain refining treatment, and using the magnetic flux leakage value of the grain-oriented electrical steel sheet after being subjected to the magnetic domain refining treatment as output data.SELECTED DRAWING: Figure 2

The stretching linkage equipment comprises a traction machine and the tension machine, the traction machine comprises a traction machine frame, a traction winding drum and a guide mechanism, the traction winding drum is installed on the traction machine frame, and the guide mechanism is arranged on the traction machine frame; the tension machine comprises a tension machine frame, an output shaft and a tension winding drum, the tension winding drum is rotationally arranged on the tension machine frame, and the output shaft is fixedly connected to the tension winding drum; a hydraulic resistance braking mechanism is fixedly arranged on the tension rack, and the hydraulic resistance braking mechanism is arranged on the output shaft in a sleeving manner; the tension machine further comprises a gear motor, and the gear motor is arranged on the tension machine frame. The hydraulic resistance braking mechanism comprises a liquid disc, a closed liquid cavity filled with magnetorheological fluid is arranged in the liquid disc, a resistance wheel set is arranged in the liquid cavity, and the resistance wheel set comprises a rotatable resistance blade and a motor; and a magnetic field regulation and control mechanism is arranged outside the liquid disc. The technical problem that hydraulic braking of existing stretching equipment fails is solved by integrating the hydraulic resistance braking mechanism and the magnetic domain regulation and control mechanism through the tensioner.

A superconducting computing apparatus includes: frequency tunable devices connected to each other and arranged in a shape; a ferromagnetic film disposed adjacent to the frequency tunable devices and having an up magnetic domain or a down magnetic domain; and a control circuit configured to adjust a position of a magnetic domain wall in the ferromagnetic film by applying a current to the ferromagnetic film, wherein the position of the magnetic domain wall controls a resonant frequency of the frequency tunable devices.

A spin device is disclosed in which a magnetic domain wall is moved to the center region of a magnetic free layer. The magnetic domain wall is moved and the perpendicular magnetic anisotropy is changed by avoiding a number of defects distributed at the edge or edge region of the magnetic free layer. So, stable operation of the spin device is secured.

According to the preparation method of the non-oriented silicon steel base, a trace rare earth element Nd is added into molten steel components, nano SiO particles are introduced, continuous casting and rolling processes are improved, a separant formula is optimized, and a mixed separant of AlO and the nano SiO particles is adopted, so that the anti-oxidation, anti-bonding and lubricating properties of the surface of a steel strip are remarkably improved; the surface defects are reduced, the performance of the non-oriented silicon steel is remarkably improved, the microstructure of the non-oriented silicon steel is optimized, and the moving resistance of a magnetic domain wall is effectively reduced, so that the iron loss P17 / 50 is remarkably reduced to 0.7-1.0 W / kg, and the magnetic induction B8 reaches 1.90 T or above and is remarkably higher than the level of a traditional process.

The invention discloses a nonlinear permanent magnet hysteresis loop description method based on magnetic domain energy minimization. The method comprises the following steps: step 1, forming a state equation by using total energy obtained by adding magnetic domain energy of six magnetic domains along easy axis directions of different crystals in permanent magnet crystal grains; 2, the minimum value of magnetic domain energy is solved, and then the optimal direction of each magnetic domain unit magnetization vector in the crystal grains is obtained; and step 3, describing a magnetic domain occurrence probability by using a Boltzmann function, and determining a Preisach model distribution function by using a probability density function so as to obtain a macroscopic hysteresis characteristic. According to the method, micro-magnetic microcosmic characterization and macroscopic magnetic performance are associated from a micromechanism, a magnetization curve of a nonlinear permanent magnet can be accurately established, and the method has an important supporting effect on research work such as electromagnetic multi-physics field simulation and the like.

The invention discloses a method and system for detecting the magnetization direction of an unmagnetized magnet, and belongs to the technical field of magnetic material detection. The method comprises the following steps: applying an external guide magnetic field to a to-be-detected non-magnetized magnet; detecting a signal related to the physical state of the non-magnetized magnet under the action of the guide magnetic field as a response signal; and judging the magnetization direction of the non-magnetized magnet based on the corresponding relation between the response signal and the preset magnetization direction. The corresponding system comprises a guide magnetic field generation unit, a detection unit and a discrimination unit. The modulation effect of magnetocrystalline anisotropy of a non-magnetized magnet on an external magnetic field is utilized, invisible magnetic domain orientation information is converted into externally observable physical field difference, efficient, visual and lossless recognition of the preset magnetization direction is achieved, and the method is suitable for production quality control of magnetic assemblies such as a Halbach magnetic circuit and the like.

The invention belongs to the technical field of soft magnetic material preparation, and particularly relates to a soft magnetic amorphous alloy capable of reducing high-frequency loss and a preparation method. The preparation method comprises the following steps: preparing an amorphous alloy sample, preparing the amorphous alloy sample into a magnetic core, and annealing; wherein the annealing temperature Toa is more than or equal to To + 10 DEG C and less than or equal to Tx1-50 DEG C; to is the annealing temperature corresponding to the minimum coercive force of the amorphous alloy sample; tx1 is the temperature at which the first crystallization peak of the amorphous alloy sample begins to crystallize. According to the preparation method, annealing is conducted under the condition that the annealing temperature Toa is larger than or equal to To + 10 DEG C and smaller than or equal to Tx1-50 DEG C through the ordering process in the amorphous alloy relaxation process, local ordering of the amorphous alloy can be promoted through the temperature interval, a high-number-density reverse domain nucleus is generated in the magnetization process, the magnetic domain structure of the amorphous alloy is refined, and the magnetic domain structure of the amorphous alloy is improved. The residual loss caused by local eddy current due to domain wall displacement in the high-frequency magnetization process is reduced, and the high-frequency loss of the amorphous alloy is greatly reduced.

The invention relates to a regulation and control method and application of Skyrmion in a Pd / Co multilayer film, and the regulation and control method comprises the following steps: preparing a Pd / [Co / Pd] x film on a substrate, x being any integer from 1 to 5; the prepared Pd / [Co / Pd] x film is completely overturned under a 100Oe magnetic field, a single magnetic domain is displayed, then mixed gas of hydrogen and inert gas is introduced, the hydrogen concentration in the mixed gas is gradually increased along with time, and the skyrmion in the film gradually appears and tends to be saturated; and hydrogen supply is stopped, the thin film is placed in air for standing, and the thin film magnetic domain structure recovers to the initial state. The invention also provides an application of the regulation and control method in a high-density nonvolatile memory. Compared with the prior art, by using the reversible diffusion behavior of hydrogen and the modulation effect of an interface electronic structure, the regulation and control range of the skyrmion is widened, the spatial resolution and the operation flexibility are also remarkably improved, and a brand new feasible way is provided for realizing a low-power-consumption and high-stability spin electronic device.

A light high-entropy steel base material with the T0 temperature lower than the room temperature is selected, heat preservation is carried out for 4 hours at the temperature of 1100 DEG C, homogenizing annealing is carried out, then water quenching is carried out after the temperature is kept for 40 minutes at the temperature of 1100 DEG C, a structure containing BCC and FCC double phases is obtained, and at the room temperature, the T0 temperature of the light high-entropy steel base material is kept at the constant temperature of 1100 DEG C for 40 minutes, and the T0 temperature of the light high-entropy steel base material is kept at the constant temperature of 1100 DEG C for 40 minutes. And performing ultrasonic rolling treatment on the surface of the sample. The method has the advantages that BCC-to-FCC martensite inverse phase transformation can be induced on the surface layer of a workpiece, the magnetic domain of the surface layer basically disappears, the strength and plasticity are synchronously improved, and the method can be widely applied to the fields of electrical equipment, MRI devices, nuclear submarine shells, aerospace, automobile key components and the like.

The invention discloses a non-oriented high-silicon steel plate machining method and a non-oriented high-silicon steel plate. The non-oriented high-silicon steel plate machining method comprises the steps that the non-oriented high-silicon steel plate is provided; a laser beam of a laser is guided by water jet, and the non-oriented high-silicon steel plate is cut into a preset size; permanent magnets are symmetrically arranged on the two sides or the rear portion of the laser and used for stabilizing magnetic domains under the action of external magnetic field energy, and the magnetic domains are arranged in the easy magnetization direction. And the cut non-oriented high-silicon steel plate is cooled through water jet, the width of a heat affected zone is reduced, and the machined non-oriented high-silicon steel plate is obtained. According to the method, the high-silicon steel plate with low surface roughness, small residual stress and excellent magnetic performance can be obtained.

The grain-oriented electrical steel sheet is provided with a plurality of magnetic domain control processing lines on the surface, and a rectangular evaluation region in which the length of the side parallel to the rolling direction of the grain-oriented electrical steel sheet is 50 mm and the length of the side parallel to the direction perpendicular to the rolling direction of the grain-oriented electrical steel sheet is 100 mm is set in the grain-oriented electrical steel sheet. When imaginary lines parallel to the direction perpendicular to the rolling direction and having a length of 100 mm are set at a 5 mm interval in a direction parallel to the rolling direction inside the evaluation region, in at least one of the imaginary lines, at least one of the imaginary lines has a length of 100 mm. The average value [beta] L of the absolute values of [beta] angles measured between two magnetic domain control points, which are the intersections of the virtual line and the magnetic domain control line, is 1.5 DEG or more, wherein the standard deviation of the interval between the magnetic domain control points is 1.25 mm or more, and the interval is the maximum value DL.

The grain-oriented electrical steel sheet is provided with a plurality of magnetic domain control processing lines extending in a direction intersecting the rolling direction on the surface, a square evaluation region having one side length of 50 mm and the other side parallel to the rolling direction is set on the surface, and a plurality of magnetic domain control processing lines extending in the direction intersecting the rolling direction are set inside the evaluation region. When virtual lines parallel to the rolling direction and having a length of 50 mm are set at 5 mm intervals in a direction perpendicular to the rolling direction, in at least one of the virtual lines, the maximum value of the interval in the rolling direction between adjacent intersections among a plurality of intersections between the virtual line and the plurality of magnetic domain control processing lines exceeds 20 mm, and the maximum value of the interval in the rolling direction between adjacent intersections among the plurality of intersections among the plurality of magnetic domain control processing lines exceeds 20 mm. And the average magnetic domain width measured along the imaginary line is 600 [mu] m or less.

A method is provided for positioning and orienting a platform such as a sample or workpiece relative to a frame of reference where the platform is a complex magnetic object that contains at least two magnetic domains with non-collinear magnetic moments and the method includes generating a spatially and temporally varying magnetic field so that each magnetic moment of the complex magnetic object interacts with the applied magnetic field. This can be used to performs an operation on a workpiece such as addition or removal of material. This can be used where the object includes a sample and, in each measurement configuration of the sample, radiation transmitted, reflected or scattered is measured from said sample material and analyzed to obtain information about the sample material.

The invention relates to a device and a method for testing surface microscopic performance of a magnetic material under a service condition, and belongs to the field of precise scientific instruments. The device is composed of a test loading module and an in-situ detection module. The test loading module drives a worm gear and a worm through a servo motor to drive a lead screw mechanism to achieve pulling or pressing preloading, and fatigue loading is completed in combination with a piezoelectric stack and a flexible hinge. A modularized high-temperature loading cavity and a liquid nitrogen refrigerating device are adopted to realize high or low-temperature environment construction; the position of the coil or the magnitude of current is accurately adjusted through the air cylinder to achieve accurate application of the magnetic field. The in-situ detection module carries out observation by using a behavior in-situ test method, and supports magnetic domain dynamic observation and in-situ mechanical test. According to the invention, the construction of a more complex coupling loading service condition is realized, the real service behavior of the magnetic material is more accurately simulated, a plurality of methods for observing the microscopic performance of the surface of the magnetic material are provided, and a more accurate observation means is provided for the research on the service performance of the magnetic material.

The application provides a chip and a terminal, and can make a chip based on magnetic domain wall logic have a timing function. The chip comprises a magnetic material layer and a conductive layer which are arranged in a stack, the magnetic material layer comprises a first trunk, a second trunk, a first branch and a second branch, and the first branch and the second branch constitute a closed loop. The first branch comprises a first transmission branch, a logic operation branch and a second transmission branch which are connected in sequence, and the second branch comprises a third transmission branch, a feedback branch and a fourth transmission branch which are connected in sequence; the first transmission branch and the third transmission branch are connected with the first trunk, and the second transmission branch and the fourth transmission branch are connected with the second trunk. The line width of the first transmission branch is smaller than that of the third transmission branch, and the line width of the second transmission branch is larger than that of the fourth transmission branch. The conductive layer is used for transmitting current, so that the magnetic domains of the magnetic material layer are alternately moved from the first trunk to the second trunk and from the second trunk to the first trunk.

A magnetic domain wall motion element includes a first ferromagnetic layer, in-plane wiring, and first, second and third via wirings. A position of the in-plane wiring in a stacking direction is different from that of the first ferromagnetic layer. The first via wiring connects the first ferromagnetic layer and in-plane wiring. The second via wiring is connected to the in-plane wiring at a different position from the first. The third via wiring is connected to the in-plane wiring at a different position from the first and second. When positions of the second and the third via wirings are projected on an axis passing through a center of the first via wiring when viewed in the stacking direction and extending in a second direction, the first via wiring is interposed between projection points of the second and third via wirings to the axis in the second direction.

This invention discloses a measurement technique for the width of magnetic domain walls based on a transmission Lorentz electron microscope, comprising the following steps: (1) observing the sample in a transmission electron microscope and obtaining a series of defocus images corresponding to the magnetic domain walls; (2) replacing the sample with a standard sample, obtaining a series of defocus images, and calculating the correction coefficients for magnifications corresponding to different defocus amounts under the current Lorentz imaging mode; (3) selecting a portion of the magnetic domain walls perpendicular to a certain area in a series of defocus images, performing Gaussian linear fitting on the intensity distribution of this area and correcting it to obtain the transverse width of the magnetic domain walls, and then performing linear fitting based on the relationship between the transverse width of the magnetic domain walls and the defocus amount to extrapolate the intrinsic width of the magnetic domain walls; (4) constructing the magnetization distribution of the magnetic domain walls based on the intrinsic width of the magnetic domain walls, simulating a series of Fresnel defocus images of the magnetic domain walls, calculating the correspondence between the width of the magnetic domain walls and the defocus amount, and extrapolating to obtain the width of the simulated magnetic domain walls under positive focus conditions. Using the method of this invention, quantitative measurement of the width of magnetic domain walls in magnetic materials can be achieved.

This magnetic domain information acquisition device acquires magnetic domain information of a magnetic material, and includes an image acquisition unit that acquires a magnetic domain image of the magnetic material, a feature acquisition unit that acquires magnetic feature quantities of the magnetic material, and an acquisition unit that determines, for each region on the surface of the magnetic material, based on image accuracy related information, whether to use the magnetic domain image or the magnetic feature quantities of the magnetic material to acquire the magnetic domain information, and acquires the magnetic domain information of the magnetic material in accordance with the determination.

The application discloses a kind of soft material 4D printing method and device with regionalized magnetic domain direction.The method comprises the following steps: establishing partition three-dimensional model and planning printing path to generate original G code;Based on the preset magnetic domain direction requirement, obtain the driving parameters of multiple magnetic poles by magnetic field model reverse decoupling, and re-edit G code to integrate magnetic field control and UV light control instruction;Prepare UV-curable soft material containing magnetic particles;After setting printing parameters, execute printing, synthesize three-dimensional magnetic field of preset direction at extrusion point when material extrusion makes magnetic particles directional, and delay to open UV light curing to lock magnetic domain direction.The application realizes three-dimensional space regionalization editing of magnetic domain direction inside soft material, significantly improves the deformation design freedom and motion control accuracy of 4D printing product, and provides reliable technical support for integrated manufacturing of complex driven soft robot.

The present invention proposes a method for manufacturing a TbDFe supermagnetic alloy based on stereolithography. The method first prepares a stereolithography slurry using a photosensitive resin as a matrix. A metal-organic chelating agent containing TbDFe supermagnetic alloy components is added to enhance the uniform distribution of the metal powder, ensuring printing accuracy and material stability. Next, degreasing is performed to remove the resin and chelating agent through heat treatment. The degreasing process is controlled by controlling the heating rate to avoid structural collapse. Decarburization is then performed in a low-oxygen atmosphere to improve the purity of the alloy and ensure structural integrity before sintering. A reduction treatment is then performed to improve structural stability and purity. Finally, high-temperature sintering is performed under the assistance of a magnetic field to optimize grain orientation and magnetic domain arrangement, thereby enhancing the magnetostrictive effect and force-to-magnetic energy conversion efficiency. This method combines stereolithography with magnetic field-assisted heat treatment, effectively avoiding the risk of structural damage during the printing of TbDFe supermagnetic alloy.

This invention provides a nanoscale spin waveguide based on alternating magnet domain walls, belonging to the field of magnetic device technology. The device comprises, from bottom to top, a substrate, an alternating magnet thin film, and a microwave excitation source. The microwave excitation source excites an alternating magnetic field with a single frequency. The alternating magnetic field interacts with the magnetic moments of the alternating magnet thin film, causing the magnetic moments to precess. This precession is then propagated outward from the microwave excitation source in the form of a wave, forming a spin wave. By reducing the frequency of the alternating magnetic field, the spin wave propagates only within the domain walls of the alternating magnet thin film, realizing an alternating magnet domain wall spin waveguide. This invention reduces the difficulty of spin wave excitation, which is beneficial for reducing device energy consumption. Furthermore, this invention offers advantages in device miniaturization and high efficiency, and can promote the generation and development of spin wave devices based on anisotropic media, possessing broad application prospects.

The invention discloses an anisotropic bonded neodymium-iron-boron magnet and a preparation method, and relates to the technical field of permanent magnet material preparation, the magnet is composed of anisotropic neodymium-iron-boron magnetic powder, a composite binder and a nanometer reinforcing phase, and the surface of the magnet is provided with an Al-Si alloy coating; wherein the composite binder is formed by blending epoxy resin and nylon, and the nano reinforced phase is fumed silica. The preparation method comprises the steps of magnetic powder pretreatment, surface modification, mixing granulation, dynamic magnetic field orientation forming, thermal-magnetic coupling curing and post-treatment. Surface adsorbed water is removed through magnetic powder pretreatment, chemical bonding is achieved through reaction of a silane coupling agent hydrolysis solution and magnetic powder surface hydroxyl groups in surface modification, the modified magnetic powder, a composite binder and a nanometer reinforced phase are subjected to melt blending through mixing granulation, and magnetic powder orientation and densification are achieved through dynamic magnetic field orientation forming through cooperation of a pulsed magnetic field and ultrasonic vibration. The thermal-magnetic coupling curing promotes the crosslinking of the adhesive and inhibits the relaxation of the magnetic domain under the condition of a magnetic field.

A magnetic domain wall movement element according to the present embodiment includes a magnetoresistance effect element that has a reference layer, a nonmagnetic layer, and a magnetic domain wall movement layer in order from a side closer to a substrate; and a first magnetization fixed layer and a second magnetization fixed layer which are each in contact with the magnetic domain wall movement layer and are separated from each other, wherein the magnetic domain wall movement layer includes a plurality of ferromagnetic layers and a plurality of insertion layers sandwiched between the plurality of ferromagnetic layers, wherein the ferromagnetic layer contains Co and Fe and has perpendicular magnetic anisotropy, and wherein, when writing is performed, a write current is allowed to flow between the first magnetization fixed layer and the second magnetization fixed layer along the magnetic domain wall movement layer.