Fig. 6: Phase diagram of Na2BaCo(PO4)2.

The magnetic phase diagrams of Na2BaCo(PO4)2 for B // c (a) and B // a (b). The data points are obtained from the AC susceptibility (AC), specific heat (Cp) and temperature or field dependence of thermal conductivity (κ(T) and κ(B)) measurements. The dashed lines are phase boundaries. For B // c, there are four phases (I, II, III, and IV) in the low-temperature and low-field region. Whereas, there are two phase (I and II) at low-temperature and low-field for B // a. The dashed lines are a guide to the eye.