Abstract
Single crystalline Mn-doped 3C-SiC nanowires were synthesized by high-purity Si, SiO2, Mn and graphite powders. The scanning electron microscopy (SEM) results indicate that the diameter of the nanowires ranged from 30 to 200nm, with a length up to tens of micrometers. The results of high resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) indicate that Mn entered into SiC lattice and the nanowires grew along the [111] direction. Superconducting quantum interference device (SQUID) results show that the nanowires exhibited room temperature ferromagnetism (RTFM) behavior. The possible origin of the ferromagnetism has been fully discussed. The RTFM of the nanowires makes them potentially useful as build components for spintronic devices.
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