Magnetotransport properties of Coх(MgF2)100-x oxygen-free nanocomposites Tatyana Tregubova, Oleg Stognei, Veronika Kirpan and Aleksandr Sitnikov EPJ Web Conf., 185 (2018) 01014 Published online: 04 July 2018 DOI: 10.1051/epjconf/201818501014