598 results about "Magnetic moment" patented technology

The invention relates to the technical field of nondestructive testing, in particular to a gear defect intelligent detection method and system based on a magnetic memory technology. If the service gear is an abnormal service gear, a plurality of abrupt change magnetic flux signals are calculated by moving a sliding window so as to draw a magnetic flux line trend distribution diagram, the magnetic flux line trend distribution diagram is identified and analyzed, and an actual magnetic domain structure of each quasi magnetic flux leakage characteristic point in the magnetization process is obtained; and analyzing the actual magnetic domain structure to obtain a plurality of magnetic moment vector variations of each quasi-magnetic leakage flux feature point, analyzing defect features of the service gear based on the change amplitude of the magnetization intensity of the strong magnetic field for the magnetic moment vector of the normal service gear and the plurality of magnetic moment vector variations, and finally outputting an accurate defect type. According to the invention, the stress defect of the gear can be detected, positioned and identified based on the magnetic memory technology, so that a reliable fault detection basis is provided for the maintenance of the gear, and the accuracy and sustainability of the use and maintenance of the gear are improved.

The present disclosure provides an orbitronic device having orbital Hall effect or inverse orbital Hall effect, and method for enhancing the efficiency thereof. The orbital torque device comprises: a ferromagnetic / non-magnetic heterojunction formed by compounding a ferromagnetic layer and a non-magnetic layer as an orbital current source, wherein the ferromagnetic layer contains a ferromagnetic material, the non-magnetic layer contains a non-magnetic material with weak spin-orbit coupling, the non-magnetic layer is used as an orbital Hall channel to generate orbital current, and the orbital current enters the ferromagnetic layer, so that an orbital torque is generated through an orbital-spin conversion effect of the ferromagnetic layer to realize switching of a magnetic moment. The present disclosure can provide orbitronic device with low cost and good performance.

The invention discloses a detection method of an ocean magnetic field sensor based on a diamond NV color center. The detection method comprises the following steps: S1, calibrating a base line; s2, alternately measuring fluorescence between two single quantum resonance frequencies, and obtaining a difference to realize DQ reading; s3, three-axis compensation current is adjusted based on closed-loop control, and the NV working point is maintained at zero magnetization bias; s4, obtaining background magnetic field change through digital demodulation and adaptive filtering; and S5, calculating a gradient based on the spatial difference of the multi-point light spots, judging the existence and trajectory of the underwater vehicle in combination with a threshold value and a spectrum matching method, calibrating the threshold value according to the magnetic field characteristics of the existing underwater vehicle, adopting short-time Fourier transform signal spectrum, comparing the threshold value with known submarine characteristic spectrum data, and prompting if the similarity exceeds a set threshold value. According to the detection method, the measurement precision and the anti-interference capability can be improved, and the method is suitable for real-time monitoring of weak magnetic anomalies (such as magnetic moment disturbance of an underwater vehicle).

The invention relates to a Hall-effect propulsion device (100) comprising: - a support body (110) extending between a first end (102) and a second end (103), the body comprising an annular outer wall (112) and an annular inner wall (113) arranged coaxially around a longitudinal axis AA' to form an annular channel (111), the first end (102) having an annular opening forming an ion outlet; - a magnetic circuit (120) arranged in the annular channel (111) and configured to generate a radial magnetic barrier in the annular channel close to the first end of the channel (102); - at least one magnetic compensation magnetic element (130) arranged in the magnetic circuit and configured to compensate for at least a fraction of an absolute value of the residual magnetic moment generated by the magnetic circuit (120).

The invention discloses a transient electromagnetic and magnetic method data joint inversion method. The method comprises the following steps: acquiring transient electromagnetic observation data and magnetic method observation data; converting the transient electromagnetic observation data into transient electromagnetic moment data; based on the transient electromagnetic moment data and the magnetic method observation data, a joint inversion objective function is constructed, and the joint inversion objective function comprises a data fitting residual term and a model constraint term; performing parameter coupling on the model constraint term by using a multivariate Gaussian mixture model to obtain a coupled model constraint term; and combining the data fitting residual term and the coupled model constraint term into a final objective function, and minimizing the final objective function through an optimization algorithm to obtain an electrical parameter and a magnetic parameter of the underground medium. According to the method, transient electromagnetic and magnetic method data joint inversion is realized, the problem of low three-dimensional inversion calculation efficiency is solved by introducing transient electromagnetic moment, and electrical and magnetic parameters are coupled by utilizing rock physics constraint, so that the inversion result is more accurate, and the structure is more consistent.

The present application is drawn to a system and method, as well as method for manufacture of a device and system for determining the position and orientation of at least one magnetic field sensor comprising: a rigid structure comprising an array of at least five electromagnetic coils; at least one wire that connects to and powers the electromagnetic coils; wherein the placement and orientation of the electromagnetic coils on the rigid structure are predetermined; wherein the electromagnetic coils, each having a predefined magnetic moment per unit current, are constructed with a printed circuit board (PCB) comprising at least one conductive layer; and wherein the system is configured such that a stray magnetic field emanating from the at least one, as measured at the location of the at least one magnetic field sensor, generates substantially lower magnetic field intensity than that produced by each of the at least five electromagnetic coils.

The invention discloses a magnetic moment comparator device and a measurement method. The magnetic moment of the current-carrying standard coil is in direct proportion to the magnetic field generated at a fixed distance on the axis, and according to the principle that a magnetic dipole layer and the current-carrying coil have equivalence in electromagnetism, when the space magnetic field can be accurately measured, the current-carrying standard coil can be used for measuring the magnetic moment of a magnetic sample at the same position. A magnetic moment comparator is designed in a magnetic shielding cylinder, an atomic magnetometer is used for measuring an absolute magnetic field with high sensitivity, a current-carrying standard coil is placed at the position, with the distance being r0, of one side of an atomic gas chamber in the direction of a background magnetic field, and the axis of the current-carrying standard coil is parallel to the direction of the background magnetic field; the magnetic moment direction of the magnetic sample is parallel to the background magnetic field direction, when the magnetic sample is moved by the sample transfer rod to the position, which is r0 away from the atomic gas chamber, of the other side of the atomic gas chamber, the current introduced into the standard coil is changed in real time by keeping the background magnetic field unchanged as a judgment condition, and the magnetic moment of the magnetic sample is equal to the magnetic moment of the current-carrying standard coil; the directions are opposite.

The invention discloses a strong spin-orbit torque metal superlattice thin film material, and belongs to the technical field of new spin electron materials. The superlattice thin film material comprises a thin film system formed by heavy metal layers with strong spin-orbit coupling and light metal layers with high-orbit Hall conductivity, wherein the heavy metal layers periodically grow on a substrate; in each period, the thickness of the heavy metal layer with strong spin-orbit coupling is 1-3nm, and the thickness of the light metal layer with high-orbit Hall conductivity is 1-3nm. Electron orbital angular momentum flow accumulation is generated on the surface of the light metal layer, the orbital current is injected into heavy metal with strong spin-orbit coupling, and the orbital current is converted into spin current by utilizing the strong spin-orbit coupling characteristic of the heavy metal layer. Therefore, the spin current generation efficiency of the strong spin orbit torque metal superlattice thin film material can be improved, and the giant damping spin orbit torque efficiency and the low-current-density turnover ferromagnetic layer magnetic moment are realized.

The invention discloses a spinning spacecraft nutation characteristic analysis method and an active suppression system. The spinning spacecraft nutation characteristic analysis method comprises the following steps: step 100, decomposing a whole satellite system into a satellite platform body, a three-axis superconducting magnet system, a rotary separation device, a momentum exchange device and a separable load according to the structural characteristics of the whole satellite system; and step 200, based on the orbit and structural characteristics of the satellite, proposing a derivation hypothesis about a whole-satellite kinetic equation so as to construct an ideal modeling environment. According to the nutation characteristic analysis method of the partial spinning spacecraft, mass mutation is added, the analysis method can be used for on-orbit delivery spacecrafts and can also be used for other spacecrafts with mass mutation characteristics, a fuzzy pid control method is adopted in the control method, parameter adjustment is conducted on pid through a fuzzy rule base, the parameter adjustment efficiency is high, and the parameter adjustment accuracy is high. The executing mechanism is a superconducting magnetic moment device, control moment is generated through interaction of superconducting magnetic moment and a geomagnetic field for active suppression, and regulation and control are flexible.

The invention discloses a nanocrystal magnetic material and a preparation method thereof, the nanocrystal magnetic material is a magnetic Nb3VSe6 crystal and comprises three elements, namely Nb, V and Se, the metered molar ratio of the three elements is 3: 1: 6, the crystal has a centrosymmetric broken hexagonal layered structure, the space group of the crystal is P6322, V atoms are inserted between two 2H-NbS2 hexagonal layers, the lattice constants a = b = 5.738, and c = 12.018. The magnetism in the material is mainly contributed by positive trivalent Cr ions, the magnetic moment is 3B, the local electron spin S is equal to 3 / 2, and conduction electrons are from unfilled bands of Nb atoms. Due to the unique crystal structure and electronic property, the material shows potential application value in multiple fields, especially in the aspects of high-frequency devices, spintronics elements, magnetic dampers and the like. The Nb3VSe6 single crystal is relatively stable in air, which is a great advantage for practical application.

The invention provides a magnetic memory, a magnetic memory unit and a magnetic memory system. The magnetic memory at least comprises a first antiferromagnetic layer, a free layer, a barrier layer, a reference layer and a second antiferromagnetic layer which are sequentially stacked from bottom to top, wherein the magnetic moment direction of the reference layer is a first direction, the magnetic moment direction of the free layer is a second direction, and the first direction is perpendicular to the second direction; when the magnetic memory is in a first mode, applying a current parallel to a second direction to the first antiferromagnetic layer, so that the magnetic moment direction of the free layer is changed from the second direction to a direction parallel to the first direction, and the magnetic memory is switched from the first mode to the second mode; the first mode is used for detecting a magnetic field around the magnetic memory; the second mode is used for data storage. Therefore, the magnetic memory can be switched from the sensing mode to the storage mode, and the occupied space and cost can be saved at the same time.

The invention provides a magnetic random access memory and a preparation method thereof. The magnetic random access memory is applied to a comparison circuit, and comprises a magnetic tunnel junction comprising a free layer, a barrier layer and a reference layer which are stacked in sequence; the spin-orbit torque layer is located on the side, away from the reference layer, of the free layer, the conductive material layer is located on the side, away from the spin-orbit torque layer, of the magnetic tunnel junction, and a conductive material of the conductive material layer has the following characteristics that spontaneous magnetization capacity is achieved, and the resistance temperature coefficient is smaller than 0; the conductive material layer comprises a first part and a second part which are arranged at an interval, the first part is in contact with the reference layer, a first input end of the comparison circuit is electrically connected with the first part, and a second input end of the comparison circuit is electrically connected with the second part. According to the invention, the technical problems that the reading window of the magnetic tunnel junction becomes small and even the reading is wrong and the magnetic random access memory needs to apply an auxiliary magnetic field along the current direction to realize the deterministic overturning of the magnetic moment are at least solved.

Provided is a magnetic moment measurement system and method, which belong to the technical field of magnetic moment measurement, and solve the problems of insufficient accuracy, low efficiency, and vulnerability to disturbance from an external magnetic field in the existing magnetic moment measurement technique. The magnetic moment measurement method includes the following steps: acquiring a magnetic field vector and a magnetic gradient tensor at a center of a magnetic sensor array through the magnetic sensor array; calculating an angle of a magnetic moment vector; and according to the angle of the magnetic moment vector, selecting a corresponding magnetic moment inversion formula, and calculating the magnetic moment vector. By constructing the magnetic sensor array, and using the advanced inversion algorithm, this application not only significantly improves the magnetic moment measurement accuracy, but also greatly shortens the measurement cycle, simplifies the measurement system, and reduces the measurement error.

The invention relates to the technical field of medical instruments, in particular to a magnetic control capsule endoscope driving method and device based on a three-dimensional space and a medium. The method comprises the steps that based on the position relation between an external permanent magnet and the magnetic control capsule endoscope in a three-dimensional space and the relation of a rotating shaft during rotating driving, the relation between the magnetic force borne by the magnetic control capsule endoscope and the driving angle is determined by combining the relation between a magnetic field and the magnetic moment in a dipole model; based on stress analysis when the magnetic control capsule endoscope is driven by rotation of an external permanent magnet, horizontal direction force borne by the magnetic control capsule endoscope is determined, and the horizontal direction force is the difference between magnetic force and friction force in the horizontal direction; when the horizontal force is greater than or equal to zero, determining the range of a driving angle; and driving the magnetic control capsule endoscope based on the range of the driving angle. According to the invention, the magnetic control capsule endoscope is driven by the external permanent magnet in the determined driving angle range, so that the magnetic control capsule endoscope can be stably driven.

The invention discloses an aviation transient electromagnetic pod coil attitude correction method and system, and belongs to the field of aviation geophysical exploration, and the system comprises a surface scanning industrial camera module which is used for obtaining the image information of a suspension coil in real time; the industrial-grade integrated navigation module is used for outputting inertial navigation data; the time synchronization and data acquisition module is used for establishing a time unification mechanism; the visual processing module is used for extracting the image processed by the time unification mechanism to obtain visual features; the inertial navigation resolving module is used for obtaining an inertial navigation state of a coil attitude angle through angular velocity integration; the data fusion and attitude estimation module is used for performing fusion calculation by combining the visual features and the inertial navigation state to obtain a fusion result; and the projection area and magnetic moment calculation module is used for calculating the ground projection area and the effective emission magnetic moment component of the coil according to the fusion result. According to the method, the system complexity and the electromagnetic interference risk caused by multi-inertial navigation layout are reduced, and the detection precision and stability of the aviation transient electromagnetic data are improved.

The invention discloses a high-frequency electronic scale inhibition and removal system, and relates to the technical field of scale inhibition and removal equipment of water devices, the high-frequency electronic scale inhibition and removal system comprises a plurality of single equipment arranged outside a water pipeline and used for scale inhibition and removal, each single equipment comprises a body and a conduction ring, and an emission control module, an electromagnetic conduction module, a communication module and a monitoring module are arranged in the body; a display screen is arranged outside the body, the conduction ring penetrates through the body and surrounds the water pipeline, the conduction ring comprises a plurality of connecting blocks, and the connecting blocks are connected through fastening bolts; additional magnetic moment, additional energy and an additional electric field are caused in water through high-frequency electromagnetic waves, a microcrystalline molecular structure separated out of water treated by the electromagnetic waves is loose, calcium carbonate of the crystal lattice is not prone to being attached to the pipe wall, the scale inhibition effect is achieved, more small water molecule clusters or monomer water molecules are generated, the permeation effect is enhanced, and the corrosion resistance is improved. And the scale inhibitor is easier to go deep into a scale layer to disintegrate and loosen scale, and gradually falls off under the impact of water flow, so that scale inhibition and removal are realized.

The invention provides a multi-magnetic accurate positioning method based on APSO-LM fusion, and solves the technical contradictions that global search and local convergence are unbalanced and the resolving efficiency is low in the existing multi-magnetic accurate positioning technology. The method comprises the following steps: constructing a magnetic moment calibration module, selecting a sensor array calibration point, collecting magnetic field data, and calculating a precise magnetic moment amplitude based on a magnetic dipole model; an NSS-VMGT initial positioning result is input through a parameter initialization module, APSO and LM algorithm parameters are configured, and particle vectors are normalized; generating a particle swarm by using an APSO global search module, and iteratively screening a global optimal parameter as an LM initial value; calculating a residual error and a Jacobian matrix by means of an LM local refining module, and iteratively optimizing and outputting a magnetic source position and a magnetic moment; and the dynamic compensation module is used for calibrating clock skew and inhibiting environment interference. The device is realized based on STM32H743, and comprises a 7 * 7 lis2mdltr sensor array, a dual-chip data acquisition link, an APSO-LM algorithm hardware acceleration module and an upper computer interaction unit.

The invention provides a Fe3O4 nano-particle microscopic imaging detection method based on left-handed and right-handed polarization modulation, belongs to the technical field of photo-thermal science and detection and signal processing, and solves the problems that at present, nano single particles are difficult to observe, and the physicochemical characteristics are difficult to obtain, the method specifically comprises the steps that a to-be-detected sample is determined, and a slide sample is prepared; starting a computer, a data acquisition card, a lock-in amplifier, a galvanometer controller and a function generator; starting an exciting light and probe light laser power supply and a refrigerator; detection parameters, laser power / current parameters and modulation parameters are set, and scanning detection is conducted on the detection sample piece; loading a magnetic field; the computer reads a signal from the data acquisition card to obtain a photo-thermal detection result image; different laser parameters and magnetic field sizes are changed, the steps are repeated, circular dichroism and magnetic circular dichroism detection results are obtained, magnetization curve measurement is carried out, and the single nanoparticle magnetic moment overturning process is monitored.

The invention provides a magnetic code disc film material and a preparation method and application thereof. By introducing the TiN layer, a proper amount of nitrogen atoms can enter lattice gaps of iron, electron cloud distribution of iron atoms is changed, and the magnetic moment of the iron atoms is changed; the magnetic moment of Fe atoms can be influenced by N atoms and crystal structures, an alpha-Fe8N phase is formed in FeCoCr through introduction of N ions, the average magnetic moment of each Fe atom in the alpha-Fe8N phase is 2.4 mu B, alpha-Fe8N is a metastable phase, a sample can finally form stable gamma '-Fe4N through annealing, and the magnetic moment of the stable gamma'-Fe4N is generally about 2.5 mu B-2. 7 mu B and is higher than the magnetic moment 2.2 mu B of the Fe atoms in metal Fe; besides, Ti forms a Ti-Fe weak magnetic phase pinning magnetic domain wall in the FeCoCr thin film, and the coercive force and residual magnetism of the FeCoCr layer can be effectively improved at the same time through the method.

The invention provides a calculation method and device of an iron-based biphase magnetic material capable of enhancing magnetic moment. The calculation method comprises the following steps: providing crystal structure samples of a soft magnetic material and a hard magnetic material; optimizing the crystal structure samples of the soft magnetic material and the hard magnetic material to obtain a crystal structure with lowest energy; compounding the multi-layer soft magnetic material structure layer and the multi-layer hard magnetic material structure layer to obtain an initial crystal structure of the biphase magnetic material; wherein interface pinning exchange coupling is formed between the soft magnetic material structure layer and the hard magnetic material structure layer; calculating to obtain the magnetic moment of the crystal structure of the new biphase magnetic material; and regulating the number of soft magnetic material structure layers and hard magnetic material structure layers in the initial crystal structure of the double-phase magnetic material, calculating the magnetic moment of the double-phase magnetic material again, and taking the crystal structure of the double-phase magnetic material with the maximum magnetic moment as the target crystal structure of the double-phase magnetic material.

The invention relates to a field emitter, a driving control method and device thereof and a storage medium, and the field emitter comprises a plurality of rotating magnet units; a reference axis is defined in the rotating magnet unit, the rotating magnet unit comprises a magnet capable of rotating around the reference axis, and the magnetic moment direction of the magnet is perpendicular to the reference axis; the reference axes of the at least two rotating magnet units are perpendicular to each other. The field emitter provided by the invention is formed by at least two rotating magnet units, and the magnetic moment combination of the magnets of the two rotating magnet units can sweep over three orthogonal space directions, so that the use requirements of the field emitter are met. Therefore, the invention provides a simple and effective field emitter configuration, and solves the problems that the conventional field emitter is not provided with a simple and effective specific configuration, so that a technician needs to construct the field emitter according to own experience, and the field emitter configuration is complicated and does not meet the use standard.

The invention belongs to the field of magnetic target body positioning, and relates to a measuring line vertical gradient-based magnetic multi-target positioning and magnetic moment inversion method, which comprises the following steps of: obtaining a unit orthogonal primary function and a primary function coefficient corresponding to each component of magnetic anomaly gradient data vertical to a measuring line, and calculating an energy curved surface of the magnetic anomaly gradient data vertical to the measuring line; detecting a local energy peak value of the energy curved surface, obtaining an energy peak value ratio sequence, obtaining a target number and horizontal position estimation corresponding to the target according to an energy sudden change value in the energy ratio sequence, and calculating a target depth corresponding to a measuring line vertical magnetic anomaly gradient energy extreme value by using a dichotomy method, and constructing a linear equation set about the target magnetic moment by using the measuring line vertical magnetic anomaly gradient data and the unit orthogonal basis function, and obtaining target magnetic moment parameter estimation through a least square method. According to the invention, the anisotropy difference of the estimation precision of the horizontal position of the target is effectively reduced, and the problem of target detection omission caused by large difference between the target burial depth and the magnetic moment module value in multi-target positioning is improved.

The invention provides a permanent magnet magnetizing control method based on magnetic domain dynamics and a magnetizer, and particularly relates to the technical field of permanent magnet magnetizing. Obtaining a three-dimensional model of the permanent magnet to be magnetized, and dividing the three-dimensional model into a plurality of magnetic domain units; obtaining a magnetic moment kinetic equation of each magnetic domain unit; magnetic moment directions of the magnetic domain units are randomly distributed when magnetizing is not carried out, the magnetic moments of the magnetic domains do spin precession under the action of an effective magnetic field, and the magnetic moment directions approach to the direction of the effective magnetic field; the magnetic moment direction of each magnetic domain unit at different moments is subjected to numerical solution, and the change track of the magnetic moment direction of the magnetic domain unit from the initial magnetic moment direction is determined according to the instantaneous magnetic moment direction of the magnetic domain unit at different moments; and determining the consistency degree of the magnetic moment direction of each magnetic domain unit according to the change track, and generating a relation graph of the magnetizing saturation, the pulse magnetic field intensity and the pulse duration. According to the method, the magnetizing precision and efficiency can be improved.

The invention relates to the technical field of material magnetostriction, and discloses a hysteresis and magnetostriction strain simulation method and system for a ferromagnetic material. The non-hysteresis magnetization intensity of the ferromagnetic material is determined by utilizing the magnetization energy of the magnetic moments distributed in all directions on the ferromagnetic material in the magnetic field direction and the total free energy in the magnetic domain, and the magnetic energy density of the ferromagnetic material under the non-hysteresis magnetization intensity is determined according to the non-hysteresis magnetization intensity. According to the principle that the internal energy is minimum when the ferromagnetic material reaches mechanical balance, hysteresis and magnetostriction strain models corresponding to the ferromagnetic material under the condition that stress is applied or not are determined according to the magnetic energy density, so that the accuracy of hysteresis and magnetostriction strain simulation is effectively improved; and the simulation analysis of hysteresis and magnetostriction characteristics is more accurate and diversified.

The invention provides a spacecraft and a product magnetic field measurement method thereof, electronic equipment and a storage medium, and the method comprises the steps: arranging a product magnetometer sensor and a background magnetometer sensor in a test region, and taking background measurement values of first background magnetic field data and second background magnetic field data at the same moment in each direction as input; fitting coefficients of background measured values and product measured values at the same moment in each direction are obtained through linear regression, a linear regression equation in each direction is constructed, background magnetic field interference is calculated according to the linear regression equations, the background magnetic field interference is eliminated from product magnetic field data, and the real magnetic induction intensity of the spacecraft and the product of the spacecraft is obtained. And calculating the magnetic moment of the spacecraft and the product thereof according to the real magnetic induction intensity. Based on the above mode, the influence of environmental fluctuation on the magnetic measurement of the spacecraft is reduced, and the purpose of accurately calculating the magnetic moment of the spacecraft and the product thereof is achieved.

The invention provides a laser pumping magnetometer and a control method thereof. The laser pumping magnetometer comprises a pumping light source, a collimation polarization module, an atomic gas chamber, a radio frequency coil, a photoelectric detector, an amplifier and a control module, linearly polarized light emitted by the pump light source passes through the collimation polarization module to obtain parallel circularly polarized light, the circularly polarized light passes through the atomic gas chamber, atoms in the atomic gas chamber are polarized under the action of the circularly polarized light, atomic magnetic moment generates precession in a magnetic field to be measured, and the circularly polarized light is partially absorbed by the atoms in the atomic gas chamber to obtain transmission light. The transmission light enters a photoelectric detector; the radio frequency coil is wound outside the atomic gas chamber, and the winding axial direction of the radio frequency coil is the same as the light path direction; the photoelectric detector is connected with the input end of the amplifier; the output end of the amplifier is connected with the radio frequency coil; the control module comprises a frequency measurement module, and the frequency measurement module is connected with the radio frequency coil. The problem that a traditional optical pump magnetometer is not high in measurement precision is solved.

The invention provides a magnetic field control self-checking system and method for a nuclear magnetic resonance gyroscope, and belongs to the technical field of nuclear magnetic resonance gyroscopes, test parameters are input from an upper computer, an AD signal acquisition circuit converts triaxial magnetic field driving current into digital signals, and the digital signals are simultaneously transmitted to an FPGA operation core; according to the magnetic moment precession amplitude-frequency equation, magnetic moment precession signals are calculated through the test parameters and the digital signals; the amplitude, the frequency and the phase information of the signal are input into the gyro output signal generation module; generating a high-frequency carrier sinusoidal signal carrying low-frequency change characteristics from the amplitude, frequency and phase information of the magnetic moment precession signal through a CORDIC algorithm, and simulating a gyro output signal; and the DA conversion circuit outputs a simulated gyro output signal to test the magnetic field control system, so that rapid self-inspection and performance optimization of the magnetic field control system without real operation of gyro equipment are realized, and the system is used for independent test and evaluation of the magnetic field control system and is suitable for popularization.

The invention discloses a wide-temperature-zone multi-degree-of-freedom cantilever beam magnetic moment testing system, and relates to the technical field of physical property measurement, the wide-temperature-zone multi-degree-of-freedom cantilever beam magnetic moment testing system comprises a hollow sample rod and a supporting frame, the supporting frame is provided with a temperature sensor, and the wide-temperature-zone multi-degree-of-freedom cantilever beam magnetic moment testing system further comprises a sample holder, a first rotating mechanism, a first driving mechanism, a second driving mechanism and a reset component, through cooperation of the first rotating mechanism, the first driving mechanism, the second driving mechanism and the like, a pull rope transmission mode is adopted, and compared with a gear transmission mode in the prior art, on the one hand, the cooling capacity leakage speed is reduced, and the accuracy of detection data is improved; secondly, the cable arrangement mode is simple, and the wiring difficulty in the prior art is reduced; thirdly, the problems that in the prior art, a cable is prone to rotating along with the hollow sample rod, poor contact is prone to occurring, the cable is abraded, and the service life of equipment is short are solved; fourthly, compared with gear drive, the pull rope drive is small in return stroke difference, and the measurement precision is improved.

The invention discloses a multi-layer thin film structure capable of achieving vertical exchange bias and free of external field auxiliary total current overturning and a preparation method and application thereof, the multi-layer thin film structure sequentially comprises a heavy metal base layer, an atomic level intercalation layer, a ferromagnetic layer and an antiferromagnetic layer from bottom to top, and the multi-layer thin film structure is prepared through molecular beam epitaxy. According to the invention, anisotropic epitaxial strain is introduced into the antiferromagnetic layer, so that a remarkable vertical exchange bias effect at room temperature is realized. Meanwhile, a global uncompensated magnetic moment is generated in the anisotropic epitaxial strain induction antiferromagnetic layer, an energy barrier of vertical exchange bias flipping is reduced, current-driven exchange bias flipping without an external field is further realized through a spin-orbit moment effect, the dependence on an external magnetic field in the prior art is overcome, and the performance of the device is improved. And the integration and the application potential of the spinning electronic device are obviously improved. The technology lays a foundation for design and development of efficient and high-density magnetic storage and logic devices.

The invention discloses a spin current spatial distribution and polarization direction adjustable spin electronic device, which comprises a substrate, and is characterized in that the substrate is provided with a non-magnetic spin source layer, a ferromagnetic layer arranged on the non-magnetic spin source layer and a current reforming layer arranged on the ferromagnetic layer; specifically, the non-magnetic spin source layer and the ferromagnetic layer form a heterojunction, and a current reforming layer with a specific plane geometric structure grows on the heterojunction. According to the invention, anisotropic magnetic moment flipping of the spin torque and full electromagnetic moment flipping of the spin torque are realized.