Investigation of DC current models in Co2+ and Ti4+ substituted M-type BaCox Tix Fe(12-2x) O19 ferrite Vikas Bhikhan, Charanjeet Singh, Rajneesh Kaur, Maciej Jaroszewski and S. Bindra Narang Eur. Phys. J. B, 88 12 (2015) 325 Published online: 07 December 2015 DOI: 10.1140/epjb/e2015-60513-7