808 research outputs found

    An online handwritten music symbol recognition system

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    The original publication is available at www.springerlink.comArticleINTERNATIONAL JOURNAL ON DOCUMENT ANALYSIS AND RECOGNITION. 9(1): 49-58 (2007)journal articl

    Epitaxial ferromagnetic Fe3_{3}Si/Si(111) structures with high-quality hetero-interfaces

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    To develop silicon-based spintronic devices, we have explored high-quality ferromagnetic Fe3_{3}Si/silicon (Si) structures. Using low-temperature molecular beam epitaxy at 130 circ^circC, we realize epitaxial growth of ferromagnetic Fe3_{3}Si layers on Si (111) with keeping an abrupt interface, and the grown Fe3_{3}Si layer has the ordered DO3DO_{3} phase. Measurements of magnetic and electrical properties for the Fe3_{3}Si/Si(111) yield a magnetic moment of ~ 3.16 muBmu_{B}/f.u. at room temperature and a rectifying Schottky-diode behavior with the ideality factor of ~ 1.08, respectively.Comment: 3 pages, 3 figure

    Spin accumulation created electrically in an n-type germanium channel using Schottky tunnel contacts

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    Using high-quality Fe3_{3}Si/n+n^{+}-Ge Schottky-tunnel-barrier contacts, we study spin accumulation in an nn-type germanium (nn-Ge) channel. In the three- or two-terminal voltage measurements with low bias current conditions at 50 K, Hanle-effect signals are clearly detected only at a forward-biased contact. These are reliable evidence for electrical detection of the spin accumulation created in the nn-Ge channel. The estimated spin lifetime in nn-Ge at 50 K is one order of magnitude shorter than those in nn-Si reported recently. The magnitude of the spin signals cannot be explained by the commonly used spin diffusion model. We discuss a possible origin of the difference between experimental data and theoretical values.Comment: 4 pages, 3 figures, To appear in J. Appl. Phy
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