Irreversible magnetic properties of carbon nanoparticles E. Lähderanta, A.V. Lashkul, K.G. Lisunov, D.A. Zherebtsov, D.M. Galimov and A.N. Titkov EPJ Web of Conferences, 40 (2013) 08008 Published online: 14 January 2013 DOI: 10.1051/epjconf/20134008008