▎ 摘　　要

The appearance of coexisting ferromagnetic and superconductive phenomena in graphite-sulfur and amorphous carbon-sulfur composites has recently attracted an important attention. In this work we propose a novel reinvestigation of the carbon-sulfur doping mechanism performed by employing carbon nanotube networks (cm-scale buckypapers) and graphene-oxide films as host-materials. In the buckypaper-case, the presence of multiple sulfidation processes involving formation of 1) carbon-sulfur and 2) metal-sulfide phases was demonstrated. Presence of carbon-sulfur bonding was identified by employing both Raman spectroscopy and X-ray photoelectron spectroscopy. The conductive and magnetic properties of the sulfur-rich areas within the bucky-paper were also investigated. An enhanced carbon-sulfur bonding was then identified in sulfur-doped grapheneoxide films. In this latter case we demonstrate an almost complete annihilation of ferromagnetic-signals. ESR-spectroscopy of this second-type of system revealed the appearance of a paramagnetic transition for g similar to 2.08 at T similar to 77 K, possibly originating from the carbon-sulfur bonding. A weak enhancement in the diamagnetic component could be interestingly detected below T similar to 60 K as a consequence of sulfur doping, after subtraction of the percolative ferromagnetic signals.