Abstract
films exhibit antiferromagnetic or ferromagnetic behavior depending on the carbon doping level . We report a detailed electronic-transport study of films prepared with different . All films exhibit metallic behavior of the temperature-dependent resistivity with a logarithmic increase towards low temperatures attributed to the structural disorder and the accompanied scattering of conduction electrons by two-level systems. Below , the Kondo-type behavior shows a crossover to Fermi-liquid behavior independent of the type of magnetic order. The magnetoelectronic properties such as Hall effect and magnetoresistance show clear differences characteristic for the different magnetically ordered phases, i.e., antiferromagnetic vs ferromagnetic.
4 More- Received 8 November 2007
DOI:https://doi.org/10.1103/PhysRevB.77.104414
©2008 American Physical Society