Preparation, characterization and impedance study of AgTaMP3O12 (M=Al, Ga, In, Cr, Fe and Y)

摘要: Abstract Preparation, characterization and electrical properties of new silver nasicons composition AgTaMP 3 O 12 (M=Al, Ga, In, Cr, Fe Y) have been investigated. All compositions crystallize in the rhombohedral nasicon structure are found to be isomorphous with NbTiP . The space group all is R 3¯c except AgTaYP , which crystallizes 3¯ group. compounds show characteristic PO 4 vibrational bands. DC conductivity studies (by two-probe method) AC impedance measurements correlate well. Cole–Cole plots do not any spikes on lower frequency side indicating negligible electrode effects. isothermal obtained from ( σ dc ) (0)) agrees activation energies log versus 1 /  T (0) τ approximately same suggesting conducting species mobile ions. peak width at half height for M ʺ modulus plot ∼1.34 decades samples, close 1.14 observed Debye solid. experimental that (max) =  C 0  / 2 nature samples. room temperature Mossbauer spectrum AgTaFeP suggests paramagnetic this sample.