Processing of ferromagnetic iron nanowire arrays

We report a fabrication of ferromagnetic iron nanowires by thermally decomposing iron pentacarbonyl molecules under the magnetic field. The nanowire array is fabricated through the pile-up of magnetic iron particles under the magnetic field. We observed that shapes of nanowires depend on iron pentacarbonyl vapor pressures. We observed three pressure ranges responsible for three kinds of nanowire shapes. We explained this pressure dependence and suggested a growth mechanism of the nanowires.