Abstract
Self-catalyzed β-FeSi2 nanowires with a high aspect ratio have been synthesized by a spontaneous chemical vapor transport and reaction method. The as-synthesized single-crystalline β-FeSi2 nanowires exhibit photoluminescence at a wavelength of 1.54 μm, which is suitable for Si-based optical communication, at room temperature. The conductivity of a single-stem β-FeSi2 nanowire was found to increase with decreasing diameter. The room temperature ferromagnetism and high magnetoresistance performance of 6% at 200 K indicates that β-FeSi2 nanowires are potentially applicable for spintronic nanodevices.
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