Abstract:
A stable FePt plating solution is provided. Further a process for electroplating is provided for producing an FePt magnetic material having especially strong coercive force and excellent properties by use of the plating solution. The plating solution contains ionic Fe, ionic Pt, and a complex agent, at a molar ratio (Fe/Pt) of the ionic Fe to the ionic Pt ranging from 0.75 to 3.
Abstract:
Processes for coating three dimensional inorganic substrates, with shielded surfaces, with transition metal oxide-containing coatings are disclosed. Such processes comprise contacting a substrate with a transition metal oxide precursor, preferably maintaining the precursor coated substrate at conditions to equilibrate the coating, and then oxidizing the precursor to form a substrate containing transition metal oxide on at least a portion of the three dimensions and shielded surfaces of the substrate. Also disclosed are substrates coated with transition metal oxide-containing coatings for use in various applications including catalysis, shielding, heating and electro rheological applications using elements such as inorganic, fluid, porous and polymer matrix elements.
Abstract:
Embodiments described herein provide methods and apparatus for treating a magnetic substrate having an imprinted, oxygen-reactive mask formed thereon by implanting ions into a magnetically active surface of the magnetic substrate through the imprinted oxygen-reactive mask, wherein the ions do not reduce the oxygen reactivity of the mask, and removing the mask by exposing the substrate to an oxygen-containing plasma. The mask may be amorphous carbon, through which carbon-containing ions are implanted into the magnetically active surface. The carbon-containing ions, which may also contain hydrogen, may be formed by activating a mixture of hydrocarbon gas and hydrogen. A ratio of the hydrogen and the hydrocarbon gas may be selected or adjusted to control the ion implantation.
Abstract:
A material capable of being applied as a film or coating on a substrate and of supplying suitable magnetic and electrical properties for magnetic applications includes cobalt, boron, and at least one of tungsten and phosphorus. The material has a resistivity between approximately 20 and 1000 μOhm-cm, a saturation magnetic flux density of between approximately 0.1 and 1.8 Tesla, a coercivity less than approximately 5 Oersted, and a relative permeability of between approximately 100 and 2000.
Abstract:
A stable FePt plating solution is provided. Further a process for electroplating is provided for producing an FePt magnetic material having especially strong coercive force and excellent properties by use of the plating solution. The plating solution contains ionic Fe, ionic Pt, and a complex agent, at a molar ratio (Fe/Pt) of the ionic Fe to the ionic Pt ranging from 0.75 to 3.
Abstract:
Process for preparing magnetic recording material by depositing ferromagnetic material in particulate form into an aluminum substrate. The aluminum substrate is prepared by cleaning an aluminum or aluminum metal containing substrate; anodizing the cleaned metal substrate, to produce a suitably pitted or porous oxide substrate surface; and rinsing the anodized substrate,substantially to remove therefrom acid residues remaining from the anodizing step. The substrate in contact with a liquid solution of a salt of at least one ferromagnetic metal is then subjected to electrolysis with alternating current, to deposit the metal into the pores of the oxide in small-particle, ferromagnetic form while adjusting and controlling the frequency of the alternating current to obtain discrete particles in the pores assembled in an anisotropic configuration. Excess liquid solution is subsequently removed from the so-treated substrate. The material is then preferably coated with a suitable resin or polymer to seal the pores and then polished to generate a suitable surface for reading or writing by magnetic heads.
Abstract:
The present invention relates to a laminated nanostructure including magnetic nanoparticles having a perpendicular magnetic anisotropy, to a method for producing same, and to a magnetic storage medium using same. More particularly, the present invention relates to a laminated nanostructure which is produced using a porous thin film as a template, and by depositing magnetic nanoparticles in the pores of the thin film through an electrodeposition process. As a result, the gaps between nanoparticles are uniform, the sizes of nanoparticles are small, and nanoparticles are free from a polarity interaction therebetween, thus enabling each of the nanoparticles to have its own polarity, and to achieve perpendicular magnetic properties.