  Superconducting characteristics such as the Meissner-Ochsenfeld state,
screening supercurrents and hysteresis loops of type-II superconductors were
observed from the temperature and magnetic field dependences of the magnetic
moment, m(T, H), in graphite powders reacted with sulfur for temperatures below
9.0 K. The temperature dependence of the lower critical field Hc1(T) was
determined and the zero-temperature penetration depth, lambda(0), was estimated
(lambda (0) = 227 nm). The superconductivity was observed to be highly
anisotropic and to coexist with a ferromagnetic state that has a Curie
temperature well above room temperature. A continuous transition from the
superconducting state to the ferromagnetic state could be achieved by simply
increasing the applied magnetic field.
