Abstract
Room temperature ferromagnetism of Mn+ -implanted Si nanowires (NWs) has been discovered. The saturation magnetization was found to increase with the Mn concentration. Healing the damages in crystallinity at 600 °C led to an increase in magnetization, while the ferromagnetism disappeared upon annealing at 800 °C as Mn atoms segregated to the surface of NWs. The results indicate that Mn+ -implanted Si NWs are potentially useful for nanoscale spintronics applications. c 2007 American Institute of Physics.