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- W2053006904 abstract "Abstract The polycrystalline samples of Pb(Mn 1/4 Cd 1/4 W 1/2 )O 3 were synthesized by a high-temperature solid-state reaction technique. A preliminary X-ray structural study of the compound at room temperature shows the formation of a single-phase compound with a non-centrosymmetric space group P 222 1 of orthorhombic structure. Studies of dielectric constant ( e ) and loss tangent (tan δ ) both as a function of frequency (10 3 –10 4 Hz) and temperature (20–350 °C) suggest that the compound undergoes a phase transition at 250 °C and has a very high value of dielectric constant ∼30,000 at transition temperature. Both ac and dc conductivity have been studied over a wide range of temperature. The activation energy ( E a ) of the compound was calculated from both the plot of ac and dc conductivity versus inverse of absolute temperature. Variation of dc resistivity with electric field (0.55–53 kV m −1 ) at room temperature and variation of dc resistivity (10 6 –10 3 Ω m) with temperature (26–350 °C) at a constant electric field of 11.2 kV m −1 showed the semiconductor characteristics of the material." @default.
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- W2053006904 date "2003-02-01" @default.
- W2053006904 modified "2023-09-26" @default.
- W2053006904 title "Phase transition in Pb(Mn1/4Cd1/4W1/2)O3 ceramics" @default.
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- W2053006904 doi "https://doi.org/10.1016/s0254-0584(02)00224-9" @default.
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