Dielectric properties of the system Ca1-xLaxSn1-xCoxO3

Compositions with x less than or equal to 0.10 in the Ca1-xLaxSn1-xCoxO3 sy stem form solid solution. Dielectric properties of these materials have bee n studied in the temperature range 300-500 K as a function of frequency fro m 100 Hz to 1 MHz. Dielectric constant of the composition with x = 0.01 rem ains almost independent of temperature up to 350 K while for the samples wi th x = 0.05 and 0.10, it increases continuously with temperature in the ent ire temperature range, This shows significant contribution of interfacial p olarization to dielectric parameters of these compositions. Scanning electr on microphotographs show the faceted nature of the grains.