High-strength magnetic materials

Two new precipitation-hardened magnetic alloys are suitable for operation in 800 to 1600 deg F range. One is a martensitic alloy and the other a cobalt-based alloy. They possess improved creep resistance and have application in high temperature inductors and alternators

All-optical control of ferromagnetic thin films and nanostructures

The interplay of light and magnetism has been a topic of interest since the original observations of Faraday and Kerr where magnetic materials affect the light polarization. While these effects have historically been exploited to use light as a probe of magnetic materials there is increasing research on using polarized light to alter or manipulate magnetism. For instance deterministic magnetic switching without any applied magnetic fields using laser pulses of the circular polarized light has been observed for specific ferrimagnetic materials. Here we demonstrate, for the first time, optical control of ferromagnetic materials ranging from magnetic thin films to multilayers and even granular films being explored for ultra-high-density magnetic recording. Our finding shows that optical control of magnetic materials is a much more general phenomenon than previously assumed. These results challenge the current theoretical understanding and will have a major impact on data memory and storage industries via the integration of optical control of ferromagnetic bits.Comment: 21 pages, 11 figure

Magnetic forming of resistive materials

Necessary theoretical foundation is given for the treatment of magnetic stresses applied to cylindrical boundaries and swaging of metallic tubing. Emphasis is placed on the use of high-resistivity materials such as stainless steel and Hastelloy

Synthesis of Magnetic Materials Pseudobrookite Fe2tio5 From Local Resources of Mineral

The synthesis and characterization of magnetic materials pseudobrookite Fe2TiO5 from local resources of iron sand has been performed. Iron sand mineral is obtained from the coast of Banten. Iron sand is prepared by mechanical milling technique to obtain a small particle size. Then sand iron is carried out leaching and magnetic seperator to separates non-magnetic impurities. And then the separation results with magnetic separator is added TiO2 according to the rules of stoichiometric tomade magneticmaterial pseudobrookite Fe2TiO5. Synthesis of pseudobrookite Fe2TiO5 use solid state reaction through a process of mechanical milling and sintered at a temperature of 1000 °C for 5 hours. Refinement results of X-Ray Diffraction pattern showed that the magnetic material pseudobrookite Fe2TiO5 has been formed of good with the crystal structure of orthorombic (space group C m c m), lattice parameters a = 3.7233(5) Å, b = 9.774(1) Å and c = 9.968(1) Å, α = β = γ = 90o, the unit cell volume of V = 362.8(1) Å3 and atomic density of ρ = 4.178 g.cm-3. The measurement results of the magnetic properties indicate that the pseudobrookite Fe2TiO5 is soft magnet, and had coercivity field and remanence magnetization are 461 Oe and 0.2 emu/g, respectively. We concluded that this study has successfully made a magnetic material pseudobrookite Fe2TiO5 from local resources of iron sands