On the Origin of the Metallic and Anisotropic Magnetic Properties of Na_xCoO_2 (x~~0.75)

M. -H. Whangbo, D. Dai, R. K. Kremer

Non-stoichiometric NaxCoO2 (0.5 < x < 1) consists of CoO2 layers made up of edge-sharing CoO6 octahedra, and exhibits strongly anisotropic magnetic susceptibilities as well as meta…