34 results about "Iron platinum" patented technology

The invention discloses a method for preparing iron-platinum nanoparticles and cobalt-platinum nanoparticles in ordered phases. Iron acetylacetonate (or cobalt) and chloroplatinic acid are dissolved in an organic solvent as an impregnating solution, impregnated with sodium chloride powder, and dried Reduction at the melting point of sodium chloride, washing with water to obtain iron-platinum (or cobalt-platinum) nanoparticles. The invention can rapidly prepare high-dispersion ordered phase iron-platinum nano-particles and cobalt-platinum nano-particles in batches, and the particle size is uniform.

The invention provides a magnetic resonance mutation spectrum material and a preparation method thereof, and in particular, the preparation method of the magnetic resonance mutation spectrum material comprises the following steps: 1) sample loading: iron platinum powder is put in an induction composite heating powder preparation device containing a heat resisting crucible; argon is charged after vacuumizing; and the pressure of the argon is kept at 1 KPa; 2) melting: a high-frequency induction power supply is started for heating to melt the iron platinum powder; and the input power is 10 KW; and 3) irradiation:an ultrasonic source or an ultrasonic wave-laser composite source radiation source is leaded in to adjust a distance between an argon shielding gas nozzle and a molten metal level as 20-25 mm to obtain black powder, namely the magnetic resonance mutation spectrum material. The magnetic resonance mutation spectrum material with different crystal form ratios is obtained through changing a laser-induction composite heating powder preparation device.

A magnetic film comprises a platinum layer having a (001) plane orientation and an island-shaped iron-platinum crystalline arranged on the platinum layer and having a (001) plane orientation parallel to the (001) plane orientation of the platinum layer, wherein the island-shaped iron-platinum crystalline has a composition region consisting of 50 atomic % of each of iron and platinum and exhibits a perpendicular magnetic anisotropy having a high coercive force in a direction perpendicular to the surface of the platinum layer.

The invention discloses a method for preparing hard magnetism iron platinum (FePt) nanometer-particles by using inorganic salt as a precursor and relates to the method for preparing the hard magnetism FePt nanometer-particles. According to the method for preparing the hard magnetism FePt nanometer-particles, the present technical problems of the complex preparation process, high energy consumption, irregular morphology of the nanometer particles and uncontrollable sizes of hard magnetism L10- FePt nanometer-particles obtained by using the surface coating method to conduct high-temperature annealing or a salt bath method are resolved. The method includes the following steps that 1, mixing and stirring are conducted under the shielding gas; 2, heating is conducted; 3, cooling is conducted; and 4, washing and drying are conducted. An easy liquid phrase thermal synthesis method is adopted; oleylamine is used as a solvent, a surfactant and a reducing agent; then, high-temperature thermal reduction of ferrous chloride and potassium chloroplatinate is conducted under a nitrogen atmosphere; the hard magnetism L10- FePt nanometer-particles with excellent magnetic performance is obtained through one step of preparation; and the magnetic performance, morphology and sizes of a product are adjusted further by adjusting the heating rate and the reaction time.

The invention provides a self-assembly magnetic memorizer which comprises a memorizer body. The memorizer body comprises a disc-shaped hard disk substrate, a plurality of annular rail grooves are formed in the hard disk substrate by taking the circle center of the hard disk substrate as the center, a silicon dioxide nanosphere array is arranged in the rail grooves, the surfaces, in contact with the air, of silicon dioxide nanospheres are provided with iron platinum thin films, and an iron platinum dot matrix is formed. A forming method of the self-assembly magnetic memorizer comprises the steps that the annular rail grooves are etched in the hard disk substrate with the photoetching technique; the silicon dioxide nanosphere array is prepared in the rail grooves in a nanometer self-assembly micromachining way; the iron platinum thin films are grown on the silicon dioxide nanospheres, and the regular iron platinum dot matrix is formed. The self-assembly magnetic memorizer lowers the coupling effect of magnetic domains to the maximum degree, meets the requirement for high magnetic recording density, and has environmental stability at the same time. The forming method of the self-assembly magnetic memorizer overcomes physical defects of traditional continuous magnetic storage media.