Magnetite whiskers with an aspect ratio of up to 1000 were grown on the surface of a stainless-steel plate as a result of its thermal oxidation in atmosphere. The stainless-steel plate bearing the whiskers had a relatively good field emission characteristic of 15 mA/cm2.

Elastic scattering of electrons by krypton atom was investigated both experimentally and theoretically. Differential cross sections (DCSs) were measured at fixed incident energies from 20 eV to 80 eV as a function of scattering angle (10 • -150 • ). From 100 eV, DCSs were measured as a function of both incident electron energy (100-260 eV) and scattering angle (30 • -110 • ), in small steps around minima. The energy dependence of the angular positions of DCS minima was determined. Theoretical results were obtained in terms of a model of phenomenological complex potential with allowance for spin-orbit interaction. Two data sets were calculated, with and without an absorption potential, and compared to experimental results. The improvements and deteriorations in agreement with measurements upon inclusion of absorption effects are discussed.

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Articles you may be interested inStructural and room-temperature ferromagnetic properties of Fe-doped CuO nanocrystals Magnetite ͑Fe 3 O 4 ͒ is oxidative resistant and has a half metallic property and is expected to have spintronic applications. In this work, ͗110͘-oriented single crystal magnetite whiskers, 30-300 nm in diameter, were synthesized on a stainless steel plate by means of the combustion flame thermal oxidation process. An electron source with this single magnetite whisker was fabricated by using a microsampling instrument in a focused ion beam system. The spin polarization of the electron source was found to be 15% at room temperature by using a Mott electron polarimeter.