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Physical Review B 74 (2006) 153409
Ferromagnetism induced by heavy-ion irradiation in fullerene films
A. Kumar, D.K. Avasthi, J.C. Pivin1, A. Tripathi, F. Singh

Magnetic measurements using a superconducting quantum interference device and magnetic force microscopy were performed on fullerene films irradiated with 250 keV Ar and 92 MeV Si ions, to compare the effects of electronic excitation and collisional cascade on the magnetization. A ferromagnetic behavior increasing with ion fluence is observed. The magnetization is attributed to (i) the formation of an amorphous carbon network and (ii) the incorporation of oxygen in the irradiated films.
1 :  CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
Physique/Matière Condensée/Science des matériaux
ferromagnetic materials – ion beam effects – magnetic susceptibility – magnetic force microscopy – fullerenes – thin films – magnetisation