Figure 3

(a) The temperature dependence of magnetization under 0.1, 1, 10, 20, 30 kOe, respectively; (b) The magnetization versus magnetic field at 4 K for Co4Nb2O9; The inset shows the magnetic susceptibility as a function of magnetic field.
(a) The temperature dependence of magnetization under 0.1, 1, 10, 20, 30 kOe, respectively; (b) The magnetization versus magnetic field at 4 K for Co4Nb2O9; The inset shows the magnetic susceptibility as a function of magnetic field.