Figure 1:shows X-ray patterns of barium and strontium perovskite cobaltites. Fig.1. X-ray patterns of perovskite structures of a) barium cobaltites BaCoO3 and b) strontium SrCoO3 obtained from a melt in a solar furnace

Figure 2:SEM micrographs of barium (a) and strontium (b) cobaltites obtained by melt quenching in a solar furnace. The temperature dependence of resistivity (ρ) and samples are shown in Fig.3

Figure 3:Temperature dependences of the electrical resistance of barium and strontium cobaltites in the temperature range 300 - 1200K