56 results about "Magnetic order" patented technology

The invention provides a method of producing a nanoparticle coated material, comprising a support and a nanoparticle layer formed on the support, wherein the nanoparticle layer contains nanoparticles comprising a CuAu type or Cu3Au type hard magnetic ordered alloy, and wherein the method satisfies at least one of the following conditions (i) and (ii): (i) the method comprises the steps of forming a shielding layer on the support before forming the nanoparticle layer; and (ii) a step of forming the nanoparticle layer comprises: the steps of applying a coating liquid containing nanoparticles capable of forming a CuAu type or Cu3Au type hard magnetic ordered alloy phase on the support to form a coating film; and irradiating laser light on the coating film.

The invention concerns a magnetic memory, whereof each memory point consists of a magnetic tunnel junction (60), comprising: a magnetic layer, called trapped layer (61), whereof the magnetization is rigid; a magnetic layer, called free layer (63), whereof the magnetization may be inverse; and insulating layer (62), interposed between the free layer (73) and the trapped layer (71) and respectively in contact with said two layers. The free layer (63) is made with an amorphous or nanocrytallized alloy based on rare earth or a transition metal, the magnetic order of said alloy being of the ferromagnetic type, said free layer having a substantially planar magnetization.

The invention relates to a magnetic memory with write inhibit selection and the writing method for same. Each memory element of the invention comprises a magnetic tunnel junction (70) consisting of: a magnetic layer, known as the trapped layer (71), having hard magnetisation; a magnetic layer, known as the free layer (73), the magnetisation of which may be reversed; and an insulating layer (72) which is disposed between the free layer (73) and the trapped layer (71) and which is in contact with both of said layers. The free layer (73) is made from an amorphous or nanocrystalline alloy based on rare earth and a transition metal, the magnetic order of said alloy being of the ferrimagnetic type. The selected operating temperature of the inventive memory is close to the compensation temperature of the alloy.

The invention relates to a nitrogen hybridized magnetic ordered meso-porous carbon adsorbent. The aperture of the adsorbent is within 3.8nm, the surface part of the adsorbent is graphitized, and the adsorbent comprises magnetic nano particles; the magnetic nano particles are iron oxide nano particles and iron nano particles. A preparation method of the adsorbent comprises the following steps: adding a meso-porous silicon SBA-15 template into an organic solution which contains furfuryl alcohol and ferric nitrate and is easy to volatilize, sufficiently mixing, performing thermal polymerization, subsequently carbonizing on the presence of an inert gas, finally removing silicon by using a strong alkali solution, and separating, washing and drying so as to obtain magnetic ordered meso-porous carbon; and dissolving the magnetic ordered meso-porous carbon into a strong acid solution, controlling the temperature to be less than 5 DEG C, adding aniline and ammonium persulfate, sufficiently mixing, washing and drying the complex after polymerization, and carbonizing on the presence of the inert gas so as to obtain the nitrogen hybridized magnetic ordered meso-porous carbon adsorbent. The adsorbent is high in adsorption efficiency, large in adsorption volume and short in adsorption balance time.

The invention relates to a processing technique of a diaper. A diaper body is included and is provided with a surface layer, a flow guide layer, an absorbing core layer and a bottom membrane layer sequentially from top to bottom; the absorbing core layer comprises a dust-free paper layer and a high-absorption material layer sequentially from bottom to top; the high-absorption material layer is made by mixing antibacterial high-absorption resin microspheres and fluff pulp in a mass ratio of (3-4):(7-6). A synthetic method of the antibacterial high-molecular water-absorbing resin microspheres applied in the diaper acts as a modification to a method of synthesizing high-molecular water-absorbing resin via a solution process; magnetic ordered mesoporous carbon nanospheres with multiple ducts,regular pore size and large specific surface area are used as a carrier; therefore, polymerization efficiency is improved, the finished high-molecular water-absorbing resin microspheres have uniform character, and the post-treatment procedures are simple.

In a method of producing magnetic particles which includes the steps of preparing alloy particles capable of forming a CuAu or Cu3Au hard magnetic ordered alloy phase and of forming magnetic particles for forming CuAu or Cu3Au magnetic particles, a plurality of solutions L1 and L2 for preparing the alloy particles are passed in a thin-plate laminar flow and diffused in the direction perpendicular to the flow direction at the contact interface of the solutions L1 and L2 in a mixing channel by using a microreactor, whereby a uniform mixing reaction is conducted in a short time.

The invention provides a method for growing nanometer particles on a substrate. According to the method, a metal pecursor solution is carried on the surface of the substrate; after solvents are evaporated, the substrate carrying metal precursor particles is obtained; then, the substrate is subjected to direct high-temperature calcinations, so that the metal precursor particles are subject to thermolysis reaction to remove other elements except metal elements; finally, the substrate is cooled to the room temperature to obtain magnetic nanometer particles. Compared with the prior art, the method has the advantages that the agglomeration between the particles is effectively avoided; the uniformly scattered nanometer particles with uniform particle diameter are obtained; particularly, when the optimum calcination temperature is higher than the phase forming temperature during nanometer alloy particle preparation, the uniformly scattered metal nanometer particles with chemical and magnetic ordered phases can be obtained through one-step synthesis; the preparation process is greatly simplified; meanwhile, the particle agglomeration phenomenon in the annealing process is avoided.

The invention relates to a Ni-Mn-Ge magnetic shape memory alloy of which the chemical formula is NixMnyGezMa, wherein M is a main group element or transition group element; and 51<x<55, 31<y<40, 5<z<20, a<5, x+y+z+a=100, and x, y, z and a represent atomic percents. The alloy is a monocrystalline material or polycrystalline material. The main group element is In, Sn, Sb, As or Si; and the transition group element is Ti, Fe or Co. The magnetic material with magnetic shape memory effect has shape memory effect and ferromagnetic property, and appears the property of entropic change (magnetic card effect) caused by magnetic-field-driven phase change and magnetic order degree change, wherein the change value is up to S=8J / Kkg.

The invention provides a method for preparing chemical and magnetic ordered-phase nanoparticles through a one-step solid-phase high-temperature sintering process. The method comprises the steps that a large amount of solid dispersing agent powder, such as NaCl and KCl, which can be dissolved in water easily and metal precursor powder are evenly mixed; high-temperature calcination is directly conducted on the mixed powder for the thermal decomposition reaction, so that other elements, except metal elements, in a precursor are removed; and the calcination temperature is controlled to be higher than the magnetic ordered-phase forming temperature, so that crystal-phase growth of prepared nanoparticles is promoted by using dispersing agents as carriers, and thus the chemical and magnetic ordered-phase nanoparticles are obtained. Compared with an existing preparation technique that chemical and magnetic ordered-phase nanoparticles can be obtained only after annealing of chemical disorder nanoparticles synthetized in liquid-phase mode, by the adoption of the method, the chemical and magnetic ordered-phase nanoparticles can be obtained through one-step synthesis without the annealing process, phenomena of agglomeration and growth of the nanoparticles in the high-temperature calcinations are avoided, and the method has good application prospects.