| Abstract |
This paper reports on the ferromagnetic properties of aged Ti1-xCoxO2-delta anatase nanopowders with different Co contents (0.03 <= x <= 0.10). It is shown for the first time that aged Co:TiO2 anatase samples retain rather high values of magnetization (M), remanence (M-r) and coercivity (H-c) which provide strong evidence for a preserved long-range ferromagnetic order. Room temperature M, M-r and H-c values were measured in the ranges of [0.05, 0.79] mu(B)/Co, [0.044, 0.096] mu(B)/Co and [366.7, 494.8]Oe, respectively, which are in the same range as in general reported either for newly prepared thin films or nanoparticles. |
