Irradiation-induced magnetism in carbon nanostructures

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 (M(s)) in the case o...

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Veröffentlicht in:	Physical review letters 2005-08, Vol.95 (9), p.097201.1-097201.4, Article 097201
Hauptverfasser:	TALAPATRA, S, GANESAN, P. G, KIM, T, VAJTAI, R, HUANG, M, SHIMA, M, RAMANATH, G, SRIVASTAVA, D, DEEVI, S. C, AJAYAN, P. M
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology Magnetic properties and materials Magnetic properties of nanostructures Physics
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	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 (M(s)) in the case of 15N implanted samples was found to be higher compared to the 12C implanted samples for dose sizes greater than 10(14) 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.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.95.097201