Abstract:
Electrochemical deposition of cobalt onto the single-layer CVD graphene draw to the formation of Co-CoO/graphene composites with increased electrical resistance and magnetoresistance. It is shown that magnetoresistance is governed with two competing mechanisms – negative (NMR) and positive (PMR). NMR at low magnetic fields could be well described with localized quantum corrections to the Drude conductivity in graphene. The enhancement of PMR at high magnetic fields could be associated with the influence of Lorentz mechanism in Co-CoO particles.
Keywords:
graphene, cobalt, cobalt oxide, electric charge transfer.
Funding agency
Grant number
State Committee for Science and Technology of the Republic of Belarus
Ф18ПЛШГ-005
State Research programs Photonics and Opto- and Microelectronics
The work was supported by the State Committee on Science and Technology, Republic of Belarus (agreement no. F18PLShG-005), within the state research programs “Photonics and Opto- and Microelectronics” (assignment no. 3.3.01), and within a contract (no. 08626319/182161170-74) with the Joint Institute for Nuclear Research, Russia.
Citation:
Yu. A. Fedotova, A. A. Kharchanka, A. K. Fedotov, M. V. Chichkov, M. D. Malinkovich, A. O. Konakov, S. A. Vorobyova, Yu. V. Kasyuk, V. È. Gumiennik, M. Kula, M. Mitura-Nowak, A. A. Maximenko, J. Przewoznik, Cz. Kapusta, “Effect of magnetic Co-CoO particles on the carrier transport in monolayer graphene”, Fizika Tverdogo Tela, 62:2 (2020), 316–325; Phys. Solid State, 62:2 (2020), 368–377