Synthesis, structure and magnetic properties of new γ-Ba(CoV1-xPxO4)2 x = 0.4-0.5

The temperature dependences of the magnetization of γ-Ba(CoP0.5V0.5O4)2, γ-Ba(CoP0.4V0.6O4)2, α-Ba(CoPO4)2 and BaCo2(VO4)2, measured in the field H = 0.5 T. Inset: the magnetizations of compounds measured at 3 K as a function of the magnetic field.253