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Ferromagnetism induced by heavy-ion irradiation in fullerene films

Abstract : 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.
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Submitted on : Monday, March 19, 2007 - 2:22:15 PM
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A. Kumar, D.K. Avasthi, J.C. Pivin, A. Tripathi, F. Singh. Ferromagnetism induced by heavy-ion irradiation in fullerene films. Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2006, 74, pp.153409. ⟨10.1103/PhysRevB.74.153409⟩. ⟨in2p3-00137302⟩



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