Growth of Magnetic Yard-Glass Shaped Boron Nitride Nanotubes with Periodic Iron Nanoparticles

Novel yard‐glass shaped boron nitride nanotubes (YG‐BNNTs) periodically filled with Fe nanoparticles were synthesized by a catalytic reaction process of ammonia with boron precursors at 1300 °C. Such novel structures were extensively characterized using X‐ray diffraction and advanced electron microscopy. The Fe‐filled boron nitride nanotubes show excellent ferromagnetic properties at room temperature with superior chemical stability. A growth model is proposed for the formation of such novel BN nanostructures. Novel yard‐glass shaped boron nitride nanotubes (YG‐BNNTs) periodically filled with Fe nanoparticles were synthesized by a catalytic reaction process of ammonia with boron precursors. As they show excellent ferromagnetic property at room temperature with superior chemical stability, it can be used in rigorous environments for nano‐scaled magnetic devices.