128 results about "Ferroics" patented technology

The application discloses a magnetoelectric heterojunction film and a preparation method thereof. The magnetoelectric heterojunction film comprises a strontium titanate base layer, a strontium ruthenate electrode layer, a bismuth ferrite ferroelectric material layer and a SmCo-based ferromagnetic material layer which are stacked in sequence. The magnetoelectric heterojunction film has the multi-ferroelectric layer room-temperature magnetoelectric coupling effect and the excellent magnetic performance of the ferromagnetic layer, and the magnetoelectric coupling effect of the heterojunction film can be enhanced through the strong exchange bias effect at the interface.

The utility model provides drilling fluid ferromagnetic substance removing equipment, and relates to the technical field of drilling auxiliary equipment, the drilling fluid ferromagnetic substance removing equipment comprises a material screening module, a machine body frame, a liquid draining module, a magnetic suction module, a cleaning module and a PLC, the material screening module is fixed above the machine body frame in a bolted mode, the liquid draining module is fixedly connected below the material screening module, and the magnetic suction module is fixedly connected below the cleaning module. A magnetic attraction module is arranged below the liquid draining module, the magnetic attraction module is fixed to the inner side of the machine body frame in a bolting mode, a cleaning module is arranged below the magnetic attraction module, the cleaning module is fixed to the machine body frame in a bolting mode, and the PLC is electrically connected with the material screening module and the magnetic attraction module. Drilling fluid can be evenly distributed on the sheet base band through the liquid draining plate, the adsorption time is prolonged, the adsorption capacity of the powerful magnet is improved, the device has a stronger magnetic adsorption effect, ferromagnetic substances in the drilling fluid can be efficiently removed through the device, through multi-layer adsorption filtration, the removal effect is good, and the efficiency is high.

A magnetoresistive stack may include a first electrically conductive material, a fixed region having a fixed magnetic state, a free region configured to have a first magnetic state and a second magnetic state, a dielectric layer disposed between the fixed region and the free region, a spacer region, and a cap layer disposed between the spacer region and the free region. The free region may include a layer of ferromagnetic material, an insertion layer, an iPMA layer, and / or a low saturation magnetization layer.

A safety system for policing a doorway comprising a door to an MRI room.

The invention relates to a rotor (10) for a brushless electric machine, wherein the rotor (10) consists of a plurality of stacked, ferromagnetic stamped sheets (20) and connected to one another, and has a longitudinal axis (22) of the rotor (10) around which magnetic elements (28) are arranged at uniform angular intervals, wherein the magnetic elements (28) are fixed in the rotor (10) when viewed in the direction of the longitudinal axis (22).

The present disclosure provides an electric synchronous motor (1) for a power tool. The motor (1) includes a rotor (2) having at least one pair of circumferential polar alterations (7), a slotless stator yoke (6) of ferromagnetic material, and a stator (4) comprising three, or a multiple of three, concentrically wound coils (5) arranged in a non-overlapping manner inside the stator yoke (6). Each coil (5) has a phase cable (9) arranged to feed the coil with current and a y-point cable (8), with the y-point cables (8) connecting the coils (5) together in a y-point. The phase cable (9) and the y-point cable (8) of each coil (5) are arranged in axially opposite ends of the stator (4).

The utility model relates to electrical engineering and can be used to protect electromagnetic voltage transformers from ferroresonant oscillations occurring in voltage transformers in distribution networks with a voltage class of 6-10 kV, alternating current with a frequency of 50 Hz with an isolated neutral.In a device for protecting voltage transformers from ferroresonance phenomena, designed with the possibility of connecting to two terminals of auxiliary secondary windings of three single-phase transformers connected in an open-delta circuit, containing a series-connected RTS thermistor, a damping resistor and an electronic switching circuit with a threshold switching characteristic, which includes a switching element in the form of a triac, the control electrode of which is connected to a control circuit including a dinistor, two resistors and a capacitor, the control electrode of the triac is connected to the control circuit through a normally closed controlled key, the RTS thermistor is equipped with a temperature sensor connected to the controlled key, and the dinistor is selected to be symmetrical.Technical result: increasing the effective operating time of a device for protecting voltage transformers from ferroresonance phenomena in the presence of modes in the network accompanied by prolonged exposure to single-phase short circuits to ground by ensuring restoration of the original operating mode. 2 fig.

The application discloses a method for analyzing ferromagnetic abrasive particles by using a PQ instrument, a data processing system and a PQ instrument comprising the same. First, the PQ index of a sample to be measured in a uniform distribution state and a uniform deposition state is respectively tested by using the PQ instrument; then, a deposition-to-averaging ratio is calculated by using the PQ index; then, a calculation correlation coefficient of the PQ index and the ferromagnetic abrasive particle content of the sample is obtained by using the deposition-to-averaging ratio; finally, the ferromagnetic abrasive particle content of the sample is obtained by using a formula. The application can not only make up for the defect that the traditional detection method of the PQ instrument cannot detect the ferromagnetic abrasive particle content, but also can roughly judge the size range of the ferromagnetic abrasive particles in the sample, has higher ferromagnetic abrasive particle content detection precision, has good sensitivity for large-size abrasive particle detection, widens the use and research range of the PQ instrument, and makes the abrasive particle detection method in oil analysis more scientific and diversified.

The application discloses an electric read-write memory device based on 180-degree flip of anti-ferromagnetic Neel vector, a preparation method and a read-write method. The electric read-write memory device comprises a substrate layer, an anti-ferromagnetic layer and a spin source layer which are sequentially stacked from bottom to top and constitute a heterostructure. The material of the substrate layer is a single crystal wafer capable of epitaxially growing the anti-ferromagnetic layer. The material of the anti-ferromagnetic layer is a collinear anti-ferromagnetic material with abnormal Hall effect or a staggered magnet with abnormal Hall effect. The material of the spin source layer has a spin current generation capability. The memory utilizes a current pulse to drive 180-degree flip of the Neel vector. The Neel vector before and after the 180-degree flip has two abnormal Hall resistance states of high and low, and can be used for storing information "0" and "1". The application not only enriches the connotation of the interaction between the spin current and the anti-ferromagnetic Neel vector, but also lays a foundation for constructing a high-density, high read-write speed and low-power nonvolatile magnetic random memory.

The power relay has an actuator comprising a micro-electromechanical system stator assembly and a plunger assembly that moves along a central longitudinal axis between a first position and a second position, the plunger assembly comprising a plunger including a pair of ferromagnetic plates between which a magnet is located, the first of the pair of ferromagnetic plates being located between a first ferromagnetic layer and a second ferromagnetic layer of the stator assembly, and the second of the pair of ferromagnetic plates being located between a second ferromagnetic layer and a third ferromagnetic layer of the stator assembly. The contacts formed by the ferromagnetic plates and ferromagnetic layers may include an array of micro-machined bends or stabilized liquid-solid electrical contacts.

In embodiments of the present disclosure, logic devices include magnetically coupled and electrically isolated perpendicular magnetic anisotropy (PMA) ferromagnet (FM) material layers. The logic devices may be read based on the anomalous Hall effect (AHE).

The application belongs to the technical field of ferromagnetic part testing, and discloses a magnetic performance testing device and testing method for magnetic materials. The testing device comprises a testing table, which is provided with a plurality of testing holes and a sample placing hole. A proximity sensor and a testing block are arranged in the testing hole, and the testing block is an iron core block. A pressure sensor is arranged above the testing block. The testing device further comprises an analysis system, and data received by the proximity sensor and the pressure sensor is transmitted to the analysis system. The testing method comprises the following steps: placing a sample block to be tested into a limiting sleeve, placing a moving part on a fixed part, aligning the sample placing hole with the testing hole, transmitting data received by the proximity sensor and the pressure sensor to the analysis system, and completing the testing of the magnetic force intensity of the sample block to be tested; rotating the moving part to make the sample placing hole communicate with the testing hole, and judging the magnetic pole of the sample block by the approach or departure of the sample block and a standard magnetic part. The application can complete the testing of the magnetic performance by the attraction between the sample to be tested and the testing block.

A heat transfer device 10 comprising a body defining a fluid circuit containing a ferrofluid, passing in proximity to a first surface 112 and a second surface 114, transferring heat between the surfac

Provided is a downhole device, a method, and a well system. The downhole device, in one aspect, includes a member and a movable element positioned about the member, the movable element having a first movable element end and a second opposite movable element end, the movable element configured to move a stroke distance (D) from a first position to a second position. The downhole device, in this aspect, further includes a ferromagnet assembly fixed to one of the member or the movable element, and first and second electromagnet assemblies fixed to an other of the movable element or the member, the first and second assemblies each having a width (WEM) and separated by a distance (DEM), wherein the distance (DEM) is less than each width (WEM).

Semiconductor device with: a pair of transistors (110, 120) on a semiconductor substrate (102); an interconnect structure across the pair of transistors (110, 120), wherein the interconnect structure has the following: Metal leads (182, 184) and metal vias (160, 210) arranged above and connected to the pair of transistors (110, 120), and a composite spin-Hall electrode (340, 530) over the metal conductors (182, 184) and metal vias (160, 210), wherein the composite spin-Hall electrode is electrically connected to the pair of transistors (110, 120) via the metal conductors and metal vias and has a first metal layer (342, 348, 531, 535, 539), a second metal layer (342, 348, 535, 535, 539) and a first spacer layer (344, 532, 536) between the first and the second metal layer, wherein the first metal layer contains a heavy metal in a first mixture of a stable and a metastable state of the heavy metal, the second metal layer contains the heavy metal in a second mixture of the stable and the metastable state of the heavy metal, and the first spacer layer contains a first material that is the first metal layer differs; and a magnetic tunnel contact (270) over the composite spin Hall electrode (340, 530); wherein the first spacer layer (344, 532, 536) comprises a crystalline metal or a crystalline metal oxide; and wherein the first spacer layer (344, 532, 536) further comprises an amorphous ferromagnetic material.

This invention discloses a combined voltage transformer with fuses and anti-ferromagnetic resonance, comprising a base, three main voltage transformers arranged parallel to each other on the base, a zero-sequence voltage transformer arranged on the same side of the arrangement direction, and three corresponding fuses conductively connected to the high-voltage side of the main voltage transformers. The fuses internally have a labyrinthine frame covered with a vaporized arc-extinguishing layer, and a spiral strip-shaped fusible element with holes. The end cap contains a striking pin mechanism composed of a metal wire, an elastic element, and a metal ball, and has an exhaust port. In the event of a short circuit or overload, this invention can isolate and divide the arc, efficiently extinguishing it using airflow. Simultaneously, the striking pin mechanism triggers an alarm and accelerates the retraction of the metal ball, instantly and directionally releasing the internal overload pressure, significantly improving the arc-extinguishing efficiency and safety performance of the equipment.

This invention provides a UAV defense and interception system, including a launching unit and a capture unit. The capture unit includes a ferromagnetic projectile, and the launching unit includes a housing. Inside the housing is a cannon barrel and a circuit circuit composed of n acceleration coils, n touch switches, n energy storage capacitors, n timing controllers, n power distribution diodes, and multiple power continuation diodes. Each acceleration coil also has a front sensor and a rear sensor at its front and rear ends, respectively. Using the technical solution of this invention, the timing controller controls the activation or deactivation of the acceleration coils. When the ferromagnetic projectile is in the transition phase between two adjacent acceleration coil stages, the preceding acceleration coil is de-energized in time, avoiding the electromagnetic force generated by the preceding acceleration coil from causing a reverse pull effect on the ferromagnetic projectile and preventing deceleration. This allows the ferromagnetic projectile to continuously accelerate, resulting in advantages such as a large interception range, long interception distance, high interception accuracy, and easy deployment of the interception net in the air.

The application discloses a ferromagnetic saturation and inrush current discrimination method and device reflecting concave-convex offset of current waveform, and the method comprises the following steps: obtaining three-phase differential current waveform according to three-phase currents of each side of a transformer, and collecting variation sequence of three-phase differential currents of the transformer based on the three-phase differential current waveform; calculating current variation difference, absolute value of the current variation difference, current period integral of the current variation difference, current period integral of the absolute value of the current variation difference, T / 3 period integral, 2T / 3 period integral and maximum number of two points of the absolute value of the current variation difference; when the sum of the T / 3 period integral, the 2T / 3 period integral, the maximum number of two points of the absolute value of the current variation difference, the absolute value of the current period integral of the current variation difference satisfies the ferromagnetic saturation and inrush current criterion reflecting the concave-convex offset of the current waveform, the inrush current or CT saturation is determined, and the differential protection is blocked. The same criterion is used, and effective identification of the inrush current and the saturation is realized.

The invention relates to an inspection vehicle (1) which is designed to be arranged and moved on an at least partially ferromagnetic base (3), comprising: - at least one measuring technology device (7) which is designed to detect physical and / or chemical properties of the surroundings, - a drive unit (8), and - at least one magnet (36), in particular a neodymium magnet, which is arranged at the underside of the inspection vehicle (1) and is designed to hold the inspection vehicle (1) at the base (3), wherein the at least one magnet (36) is guided in a clamping device (37), in particular a rail, in such a way that it can move freely in the direction of movement (38).

Incremental Magnetic Encoder The present invention relates to an incremental magnetic encoder (10) comprising a fixed body and a moving body. One of the bodies, referred to as the first body (21), comprises: - a first toothed component extending along a longitudinal direction and a circumferential direction, one of said directions corresponding to a first encoding direction; the other body, referred to as the second body (22), comprises: - a second toothed component defining a tooth made of magnetic or ferromagnetic material and arranged opposite teeth of the first toothed component; - a pair of magnetic coils configured to measure each change in inductance between the first toothed component and the second toothed component, to quantify each movement of the moving body along the first encoding direction. Figure for the abstract: Figure 2

This invention relates to the field of magnetic electronic devices, and more particularly to a magnetic tunnel junction, its fabrication method, and its applications. The magnetic tunnel junction includes: a lower electrode layer, a tunneling barrier layer, and an upper electrode layer; the tunneling barrier layer is disposed between the upper and lower electrode layers; wherein the tunneling barrier layer includes a self-supporting hafnium zirconium oxide film; the thickness of the self-supporting hafnium zirconium oxide film is 1-3 nm. The fabrication of this magnetic tunnel junction includes: firstly, growing an ultrathin LSMO / HZO bilayer structure on a substrate using PLD; utilizing LSMO as a sacrificial layer that can be selectively removed by a mixed solution of HCl and KI to release HZO in a self-supporting form; then, attaching the HZO to an FGT electrode to finally form the magnetic tunnel junction. The magnetic tunnel junction provided by this invention exhibits a tunneling magnetoresistance ratio (TMR) of approximately 140% at 2 K, indicating that the combination of this ultrathin ferroelectric barrier and the two-dimensional ferromagnetic electrode can achieve significant spin-polarized tunneling.

A coupling device may include a first housing comprising. The coupling device may include a ferromagnetic material, a first electrical connector, and a second housing couplable to the first housing. The second housing may include a second electrical connector couplable to the first electrical connector. The coupling device may include an electro-permanent magnet electrically coupled to the second electrical connector and magnetically couplable to the ferromagnetic material; wherein the electro-permanent magnet is configured to switch between an ON state and an OFF state in response to a disconnection signal.

This invention discloses an intelligent relay protection system that integrates relay protection knowledge and data. The data acquisition module collects the power system operating parameters required for the first to third types of relay protection. The fault identification module inputs each power system operating parameter into the corresponding fault identification model for the first to third types of relay protection and obtains the corresponding fault identification results. The tripping module determines whether to output the corresponding tripping information based on the fault identification results. The first type of relay protection is line protection with distributed parameter characteristics; the second type of relay protection is main equipment protection with ferromagnetic characteristics; and the third type of relay protection is component protection with only circuit relationships. This invention can adapt to the complex fault conditions of new power systems, and eliminates the reliance on numerous protection settings and pressure plates, greatly reducing the workload of maintenance personnel and the number of devices required, while significantly reducing operational risks.

The application belongs to the technical field of multiferroic materials, and relates to a design method of a multiferroic material based on a vanadium-doped two-dimensional ferroelectric body and the multiferroic material. Single-layer NbOI2 primitive cells are expanded in different directions to obtain supercells of different sizes. Vanadium is used as a doping element to dope the supercells of different sizes, and the doping configurations of each supercell under different doping concentrations are obtained. The doping configuration with the lowest total energy of the ferromagnetic state and the antiferromagnetic state under each doping concentration is used as the ground state configuration of the doping concentration. The band gap Eg and the spontaneous ferroelectric polarization intensity along the b-axis of the ground state configuration under different doping concentrations are calculated. A double-Y-axis curve graph is drawn with the doping concentration as the horizontal coordinate and the spontaneous ferroelectric polarization intensity and the band gap Eg as the vertical coordinate, and the multiferroic phase region and the magnetic semimetal phase region are divided. The doping concentration-physical property evolution phase diagram is obtained, so that the corresponding doping concentration value range of the ground state configuration with the multiferroic phase of ferroelectricity and antiferromagnetism is obtained to design the multiferroic material.

The utility model discloses a kind of magnetic attraction ring and electronic equipment protective shell, and magnetic attraction ring includes viscose ring;Magnetic ring, with viscose ring is bonded;Metal ring, with the end surface of magnetic ring far from viscose ring is bonded;Protective ring, with the end surface of metal ring far from magnetic ring is bonded.Utilize the high magnetic guide characteristic of metal ring, form magnetic flux closed loop, significantly reduce magnetic resistance, avoid magnetic force line direct penetration electronic equipment, while metal ring will magnetic field line be restrained in its own interior, reduce the magnetization of ferromagnetic material in electronic equipment interior, to inhibit demagnetization field generation, it can reduce the magnetic field interference between magnetic ring and electronic equipment, thereby play the role of long-term keeping the magnetic force of magnetic ring not attenuation and enhancing magnetic force.

Device and method for inserting a ferromagnetic joining element into a component with one-sided accessibility, characterized in that the device comprises a coil accelerator which accelerates the joining element in the direction of the component by means of an electromagnetic force generated by one or more coils.

This invention discloses a ferromagnetic detection system in the field of ferromagnetic detection technology, including a detection integration module, a main control unit, a human-machine interaction component, and a storage component. The detection integration module includes a mounting shell, which is an integrated structure. An electromagnetic induction sensor is mounted on one side, a high-definition camera is fixed at one end, and a temperature and humidity sensor is mounted at the other end. An audible and visual alarm is fixed at the top by threaded fasteners. By integrating the electromagnetic induction sensor, high-definition camera, temperature and humidity sensor, and audible and visual alarm into the mounting shell, the system achieves an integrated function of "ferromagnetic detection + real-time recording + temperature and humidity monitoring + alarm," solving the problem of limited functionality in existing equipment. When an alarm is triggered, the high-definition camera automatically marks key recordings and synchronizes them to the local machine and the cloud, facilitating event tracing. Real-time feedback of temperature and humidity data ensures compliance with the operating environment of MRI equipment.

The disclosure provides a preparation method of a ferromagnetic metal, comprising: depositing a ferromagnetic metal CuCo film on a substrate by using an atomic group beam flow deposition technology; wherein the size distribution of atomic groups is regulated by adjusting the pressure gradient between a sputtering cavity and a growth cavity and the deposition distance between a target material and the substrate; and after the deposition is completed, in-situ annealing treatment is performed on the ferromagnetic metal CuCo film to adjust the short-range order degree, so as to obtain the ferromagnetic metal. The method disclosed by the disclosure realizes the growth of a highly disordered ferromagnetic metal film.

The invention relates to the field of ferromagnetic materials, in particular, soft ferromagnetic composite materials, or Soft Magnetic Composites (SMCs), which reduce eddy current losses in magnetic components, thereby improving their magnetic properties. Specifically, the invention relates to a composition for forming an electrically insulating coating on the surface of a substrate. The invention also relates to a process for preparing said composition and its uses, particularly for preparing a ferromagnetic composite material (SMC). Figure for the abstract: None