Irradiation-Induced Magnetism in Carbon Nanostructures

by S. Talapatra et al. Physical Review Letters, 26 Aug 2005 Nitrogen (¹⁵N) and carbon (¹²C) ion implantations with implant energy of 100 keV for different doses were performed on nanosized diamond (ND) particles. Magnetic measurements on the doped ND show ferromagnetic hysteresis behavior at room temperature. The saturation magnetization (Ms) in the case of ¹⁵N implanted samples was found to be higher compared to the ¹²C implanted samples for dose sizes greater than 10¹⁴ cm^-2. The role of structural modification or defects along with the carbon-nitrogen (C-N) bonding states for the observed enhanced ferromagnetic ordering in ¹⁵N doped samples is explained on the basis of x-ray photoelectron spectroscopy measurements. Read more