Phys. Rev. Lett. 95, 097201 (2005) [4 pages]Irradiation-Induced Magnetism in Carbon NanostructuresReceived 20 April 2005; published 23 August 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. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.097201
DOI:
10.1103/PhysRevLett.95.097201
PACS:
75.75.+a, 72.80.Ng, 75.50.Pp
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