24 results about "Ferrimagnetism" patented technology

The invention provides a layered Van der Waals material with full-compensation ferrimagnetism and a topological Hall effect as well as a preparation method and application of the layered Van der Waals material. The chemical formula of the material is MnxCrTe2, wherein 0 lt; and x is 1. The material provided by the invention has a wide compensation temperature range, a large magnetoresistance effect, anisotropy and a topological Hall effect, is a CrTe2 intercalation ferromagnetic material doped in different proportions, and can realize optimization and continuous adjustability of performances such as magnetism, Curie temperature and Hall parameters of the material through regulation and control of mechanisms such as the doping proportion, the temperature and the magnetic field; and a material basis is provided for researching the application of the Mn intercalation CrTe2 crystal material in the field of magnetic induced storage.

Example nanoparticles may include an iron-based core, and a shell. The shell may include a non-magnetic, anti-ferromagnetic, or ferrimagnetic material. Example alloy compositions may include an iron-based grain, and a grain boundary. The grain boundary may include a non-magnetic, anti-ferromagnetic, or ferrimagnetic material. Example techniques for forming iron-based core-shell nanoparticles may include depositing a shell on an iron-based core. The depositing may include immersing the iron-based core in a salt composition for a predetermined period of time. The depositing may include milling the iron-based core with a salt composition for a predetermined period of time. Example techniques for treating a composition comprising core-shell nanoparticles may include nitriding the composition.

The present invention relates to a nanoparticle that can be used to capture a pollutant, of the type comprising a core made of ferrimagnetic material, the core being covered with a layer of ethyl orthosilicate to which at least one cyclodextrin molecule is covalently attached by a linker comprising a main chain and side chains. Characteristically, the cyclodextrin molecule is linked to a triazole ring attached to the end of the chain of the linker and / or to the end of at least one side chain of the linker.

The invention belongs to the technical field of preparation of high-entropy oxides, and discloses a preparation method of a ferromagnetic spinel type high-entropy oxide material, the chemical formula of the ferromagnetic spinel type high-entropy oxide material is (Mn < 0.2 > Fe < 0.2 > Co < 0.2 > Ni < 0.2 > X < 0.2 >) 3O4, X is one of Cr and Cu, and X is one of Ni and Cu. The preparation method comprises the following steps: weighing each metal nitrate according to the stoichiometric ratio of each element in the chemical formula (Mn0. 2Fe0. 2Co0. 2Ni0. 2X0. 2) 3O4, adding the metal nitrate and a template agent into deionized water, dissolving, and carrying out ultrasonic treatment to obtain a precursor solution; drying the precursor solution into sol; and calcining the sol-like precursor to obtain the ferromagnetic spinel type high-entropy oxide material. The high-entropy oxide material is controllable in morphology, shows stable ferrimagnetism, and has huge application prospects in the fields of magnetic catalysis, magnetic storage and the like.

The present disclosure relates to an aerosol-generating article (100) for use with an induction-heated aerosol-generating device (10). The article comprises an aerosol-forming substrate (130) and a susceptor device (120) for heating the aerosol-forming substrate by interaction of the susceptor device with an alternating magnetic field provided by the aerosol-generating device. The susceptor device comprises a plurality of elongate susceptor elements (121) comprising a ferromagnetic or ferrimagnetic susceptor material dispersed throughout the aerosol-forming substrate wherein the ratio of the length dimension of the susceptor elements to the maximum lateral dimension of the susceptor elements perpendicular to the length dimension is greater than 4. The present disclosure also relates to an aerosol-generating system comprising such an article and an induction heated aerosol-generating device for use with an article.

This invention relates to magnetic iron oxide nanoparticles (NPs), and to methods of making the magnetic iron oxide nanoparticles (NPs) with tunable particle sizes and crystallite size. More specifically, this invention provides methods for making highly crystalline iron oxide nanospheres (IONSs) that exhibit enhanced ferrimagnetic (FM) properties. In addition, the method allows precise modulation of the nanoparticle crystallinity, which in turn enables the ability to finely tune their magnetic properties from ferrimagnetic (FM) properties to superparamagnetic (SPM) properties.

This invention relates to magnetic iron oxide nanoparticles (NPs), and to methods of making the magnetic iron oxide nanoparticles (NPs) with tunable particle sizes and crystallite size. More specifically, this invention provides methods for making highly crystalline iron oxide nanospheres (IONSs) that exhibit enhanced ferrimagnetic (FM) properties. In addition, the method allows precise modulation of the nanoparticle crystallinity, which in turn enables the ability to finely tune their magnetic properties from ferrimagnetic (FM) properties to superparamagnetic (SPM) properties.

The present application relates to an apparatus which comprises a wireless power transfer system. This system comprises features which allow it to transfer more power wirelessly at extended distances than other systems operating in the same frequency range. The system possesses heat dissipation features; these features allow it to operate effectively in elevated-temperature environments, and to transfer power at higher levels and / or greater distances than a typical power-transfer system. The system also might include design features to withstand mechanical shocks, stresses, and impacts for use in a rugged environment. The system can also comprise adaptations to reduce electromagnetic interference, and can comprise specially shaped components with magnetic / ferrimagnetic properties that enhance performance. Other potential features include power conditioning by combining, within one circuit or one board, multiple elements that protect against excessive current, over-voltage, and / or reverse voltage.

The present invention relates to an additive in the form of a composite comprising ferrimagnetic particles of at least one iron-containing oxide, at least one first expanding agent having a structure whose volume can be increased by at least 50% by heating, and optionally at least one second expanding agent different from the at least one first expanding agent, which is at least one gas-releasing expanding agent, wherein the weight percentage of the ferrimagnetic particles, the weight percentage of the at least one first expanding agent and optionally the weight percentage of the at least one second expanding agent, each based on the total weight of the additive, supplement each other to at least 95% by weight, based on the total weight of the additive.Furthermore, the present invention also relates to a method for producing the additive, as well as to an adhesive composition comprising at least one additive according to the invention and its production. The present invention also further relates to the use of the additive in an adhesive composition.

Non-reversible circuit elements are used in the 3GHz to 6GHz band. [Solution] A method for using an irreversible circuit element comprising a ferrimagnetic material having a main surface, a plurality of central conductors arranged on the main surface of the ferrimagnetic material in an insulated state from each other, and a laminated magnet in which a ferrite magnet containing Sr and a rare earth magnet containing Sm are stacked, wherein the laminated magnet is arranged opposite the plurality of central conductors, A method for using the non-reversible circuit element, wherein the frequency characteristics of the insertion loss in the non-reversible circuit element are such that, in a temperature range of -40°C to 125°C, the resonant frequency of the main band and the attenuation pole closest to the resonant frequency are separated by 200 MHz or more.

The application discloses an inorganic compound and a preparation method and application thereof. The chemical formula of the inorganic compound is NaMn2(IO3)6, the inorganic compound belongs to a trigonal system, a space group is P3, cell parameters are alpha = beta = 90 DEG, gamma = 120 DEG, and Z = 1. The inorganic compound has a nonlinear optical effect, a powder frequency doubling effect thereof is 0.55 times of that of KH2PO4 (KDP) under 1064 nm laser irradiation; and the inorganic compound has ferrimagnetism at low temperature 10 K.

A stator includes a core and a molded midsection arranged to define a plurality of slots. The stator also includes a plurality of conductors wound within the slots. Portions of the midsection immediately adjacent to the slots include magnetic insulator embedded therein. The magnetic insulator is electrically insulating and has ferrimagnetic ordering. The stator further includes a plurality of non-magnetic wedges disposed between the conductors and an inner diameter surface of the stator.

The utility model belongs to the technical field of sewing machines, and particularly relates to a sewing machine side cover magnetic attraction structure which comprises a machine shell and an electric control side cover, a rear window plate is arranged on the side edge of the machine shell, the rear window plate is made of ferromagnetic materials or ferrous magnetic materials, a magnet is arranged on the electric control side cover, and the electric control side cover is magnetically attracted to the rear window plate through the magnet. The electric control side cover is convenient to disassemble and assemble, convenience is provided for later maintenance, the problems that screws are loosened, threads are damaged and screw holes are abraded are solved, and the problems that the electric control side cover falls off and cannot be installed on a machine shell are solved.

The present disclosure relates to a method of manufacturing a gasket for electromagnetic shielding wherein the method comprises the steps of: a) providing a composition comprising i) a viscous material and ii) particles having electrical and ferromagnetic and / or ferrimagnetic properties; the invention relates to a method for manufacturing a substrate, comprising a) applying a composition to the substrate by applying the composition in the form of a gasket having a length, a width and a height, c) applying a magnetic field on the gasket resulting in a change in the geometry of the gasket, preferably the change resulting in an increase in the height of the gasket, where the applied magnetic field is in the range of 750 to 2500 gauss. The present disclosure further relates to gaskets manufactured by the method and uses thereof.

This invention relates to magnetic iron oxide nanoparticles (NPs), and to methods of making the magnetic iron oxide nanoparticles (NPs) with tunable particle sizes and crystallite size. More specifically, this invention provides methods for making highly crystalline iron oxide nanospheres (IONSs) that exhibit enhanced ferrimagnetic (FM) properties. In addition, the method allows precise modulation of the nanoparticle crystallinity, which in turn enables the ability to finely tune their magnetic properties from ferrimagnetic (FM) properties to superparamagnetic (SPM) properties.

The application discloses a passive back cavity wall based on a plane sound field, comprising a magnetic structure, a magnetic film and a pressure-sensitive adhesive layer; each magnetic structure is a ferrimagnetic magnetic structure, and a plurality of magnetic structures are spliced through the pressure-sensitive adhesive layer to form a U-shaped or H-shaped magnetic cavity structure matched with an active device; each magnetic cavity structure is arranged at a central position directly below the corresponding active device and is fixedly connected with the corresponding position of the lower surface of the plane material through the pressure-sensitive adhesive layer; a magnetic film matched with the magnetic cavity structure is arranged on the outer surface of each magnetic cavity structure; each magnetic film has magnetism, is preliminarily fixed through the magnetic attraction generated between the magnetic film and the corresponding magnetic cavity structure, and is used for adsorbing and sealing the corresponding magnetic cavity structure, so that the passive back cavity wall matched with the active device is formed. The application assists in increasing the low-frequency vibration amplitude and displacement through the induced magnetic field formed by the passive magnetic cavity structure, and improves the low frequency and high frequency.

An aerosol-generating device for generating an aerosol by inductive heating of an aerosol-forming substrate is provided, the aerosol-generating device including: a device housing including a cavity to removably receive the substrate to be heated; an inductive heating arrangement including an induction coil to generate a varying magnetic field within the cavity, the coil being arranged around at least part of the cavity; and a flux concentrator arranged around at least part of the induction coil and configured to distort the varying magnetic field towards the cavity during use of the device, the flux concentrator including a multi-layer flux concentrator foil having at least one magnetic layer laminated with at least a first support layer, the magnetic layer including a plurality of separated fragments of a ferromagnetic or ferrimagnetic alloy, and gaps between the fragments being at least partially filled with an electrically insulating material.

The present application provides a non-reciprocal circuit element suitable for a 3 GHz to 6 GHz band. The non-reciprocal circuit element includes a ferrimagnetic body (3) having a main surface; a plurality of center conductors (4, 5, 6) disposed in an insulating state with respect to each other on the main surface of the ferrimagnetic body; and a laminated magnet that is a laminate of a Sr-containing ferrite magnet (2B) and a Sm-containing rare earth magnet (2A) and is disposed opposite the plurality of center conductors, the laminated magnet having a temperature coefficient of the remanent flux density of the laminated magnet of -0.14% / °C or more and -0.06% / °C or less. The ferrimagnetic body preferably has a saturation flux density of 40 mT or more and 80 mT or less, has a temperature coefficient of the saturation flux density of -0.45% / °C or more and -0.25% / °C or less, and has a low ferromagnetic resonance half-width (ΔH < 2500 A / m).

A mounting system (30) for an image acquisition device (31), in particular a smartphone (32), on an optical observation device (1, 2, 70) is described. The mounting system (30) has a retaining ring (34) which, at least in the intended mounting state, is arranged on an eyepiece tube (16) of the observation device (1, 2, 70) on a side of an eyecup (20) of the eyepiece tube (16) facing away from the viewing end of the eyepiece tube (16), wherein the retaining ring (34) comprises or is made of ferro- or ferrimagnetic material. Furthermore, the mounting system (30) has a mounting ring (40) which is configured for magnetic coupling with the retaining ring (34) and supports the image acquisition device (31, 32) in the intended operating state. The fastening ring (40) surrounds the eyecup (20) on the outside when in its intended operating state.

The present disclosure relates to a method for manufacturing a gasket for electromagnetic shielding, wherein the method comprises the steps of:a) providing a composition comprising i) a viscous material and ii) particles having electrical conductivity and ferromagnetic and / or ferrimagnetic properties;b) applying said composition to a substrate, by applying the composition in the form of a gasket having a length, a width and a height,c) applying a magnetic field across said gasket, resulting in a change in a geometry of the gasket, preferably the change results in the height of the gasket increasing,wherein the magnetic field applied is in the range of 750-2500 Gauss. The present disclosure further relates to gaskets manufactured by said method and their usage.

This invention belongs to the field of semiconductor device technology and discloses an all-oxide vertical ferrimagnetic tunnel junction, its fabrication method, and its applications. The all-oxide vertical ferrimagnetic tunnel junction comprises NiCo layers sequentially stacked on a substrate. 2‑y Fe y O4 layer, MgAl2O4 layer, NiCo 2‑x Fe x O4 layer, and NiCo 2‑y Fe y O4 layer, MgAl2O4 layer, NiCo 2‑x Fe x The O4 layer is ring-shaped, where 0 ≤ y ≤ x ≤ 0.2; the substrate composition is MgAl2O4. This all-oxide vertical ferrimagnetic tunnel junction exhibits a significant tunneling magnetoresistance signal when a 1 μA current is applied under magnetic field assistance, corresponding to a current density less than 1 A / cm². 2 High conductivity results in low overall resistance of the tunnel junction, reducing energy consumption. Furthermore, the lower current density helps reduce transistor size, enabling denser storage.

The present invention relates to a rotor (10) for an electric machine of a motor vehicle, wherein the rotor (10) comprises at least one magnet (12) with a core made of a ferrimagnetic material for generating a magnetic field, wherein the rotor (10) comprises on the at least one magnet (12) a currentable inductive component (18) for adjusting the magnetic field that can be generated by the magnet (12). Furthermore, the present invention relates to a method for controlling the current supply to a currentable inductive component (18). Furthermore, the invention relates to a drive train for a motor vehicle that is at least partially electrically powered, comprising an electric machine with the above rotor (10) and a control device (20), wherein the control device (20) is designed to carry out the above method.

The application relates to the field of spin electronic devices, in particular to a nano-twin Cr2O3 film with room-temperature ferrimagnetism and a preparation method thereof, which is suitable for non-volatile, low-power-consumption and high-sensitivity spin electronic devices. A Cr2O3 epitaxial film is grown on a SrTiO3 (111) substrate by using a pulse laser deposition technology, and a high-density nano-twin is grown in the film through regulation of a film growth process. Two kinds of twin boundaries with different atomic structures are formed in the nano-twin film, one of which is ferromagnetic coupling and has a net magnetic moment, so that the nano-twin Cr2O3 film presents room-temperature ferrimagnetism. The application opens up an effective way for regulating the magnetism of film materials by using nano-twins, thereby laying a foundation for the development of high-performance nano-twin magnetic materials.

A frequency-tunable component for cryogenically cooled applications comprises a YIG sphere (201), i.e. a piece of solid ferrimagnetic or ferromagnetic resonator material with an unloaded Q value larger than 400. One or more input ports (305) and one or more output ports (306) are provided for coupling oscillating signals to and from said YIG sphere (201) at frequencies above 0.5 GHz. A controllable magnet arrangement (204, 205, 301, 302, 401, 402, 503, 504, 505, 506, 602, 903, 1002, 1003) is configured to induce, in response to one or more control signals, a magnetic field at a location of said YIG sphere (201). A magnetic flux density of said induced magnetic field depends on values of said one or more control signals. A common supporting and thermalizing frame (403, 501, 601) is thermally coupled to said YIG sphere (201) and to said controllable magnet arrangement (204, 205, 301, 302, 401, 402, 503, 504, 505, 506, 602, 903, 1002, 1003) and configured to maintain said controllable magnet arrangement (204, 205, 301, 302, 401, 402, 503, 504, 505, 506, 602, 903, 1002, 1003) fixed with respect to said YIG sphere (201).