2002/03/29 by S. Moehlecke, Pei-Chun Ho, M. B. Maple · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Fiber-reinforced polymer composites #Graphene research and applications #Graphite, nuclear technology, radiation studies #cond-mat.supr-con
paper · pdf · doi:10.1080/13642810210146443
17 pages, 6 figures, to be published in Phil. Mag. Lett
arxiv created 2002/03/29 · openalex publication_date 2002/08/01 · arxiv updated 2009/11/30 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
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.