(1) Department of Physics, Vidyasagar University, Midnapore, 721 102, India;(2) Department of Physics and Meteorology, Indian Institute of Technology, Kharagpur, 721 302, India
Abstract:
Y-modified Pb(SnTi)O3 polycrystalline materials with a general formula (Pb (Sn (PYST) (x = 0, 0.05, 0.07, 0.1) have been synthesized using the standard mixed oxide method. Crystallographic and surface morphology studies are carried out by the powder X-ray diffraction and scanning electron microscopy techniques. X-ray diffraction studies of the samples showed the tetragonal structure of the unit cell. Uniform grain distributions with porosity throughout the surface of the sample pellets are observed. The TC (transition temperature) increases with increase in the mole fraction of the substituent (x). ɛ/max is found to decrease with increase in x. The slope of lnσac∼ 1/T shows distinct variations for temperature below 410 K, 410 K to Tc and for T > Tc. The room temperature ac conductivity at 10 kHz lies in the range of 10−5–10−6 (ohm−1 m−1).
(Sn
(PYST) (x = 0, 0.05, 0.07, 0.1) have been synthesized using the standard mixed oxide method. Crystallographic and surface morphology studies are carried out by the powder X-ray diffraction and scanning electron microscopy techniques. X-ray diffraction studies of the samples showed the tetragonal structure of the unit cell. Uniform grain distributions with porosity throughout the surface of the sample pellets are observed. The T C (transition temperature) increases with increase in the mole fraction of the substituent (x). ɛ/ max is found to decrease with increase in x. The slope of lnσac∼ 1/T shows distinct variations for temperature below 410 K, 410 K to T c and for T > T c. The room temperature ac conductivity at 10 kHz lies in the range of 10−5–10−6 (ohm−1 m−1).