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- W2759631796 abstract "In oxide materials, nanostructuring effect has been found very promising approach for the enhancement of textit{figure-of-merit}, textit{ZT}. In the present work, we have synthesized La$_{0.7}$Sr$_{0.3}$MnO$_{3}$ (LSMO) compound using sol-gel method and samples of crystallite size of 34, 41, and 49 nm were obtained by giving different heat treatment. Seebeck coefficient ($alpha$), electrical resistivity ($rho$), and thermal conductivity ($kappa$) measurements were carried out in 300-600 K temperature range. The systematic change in the values of $alpha$ from $sim$ -19 $mu$V/K to $sim$ -24 $mu$V/K and drastic reduction in the values of $kappa$ from $sim$0.88 W/mK to $sim$0.23 W/mK are observed as crystallite size is reduced from 49 nm to 34 nm at $sim$600 K. Also, fall in the values of $rho$ in the paramagnetic (PM) insulator phase (400-600 K) are effectively responsible for the increasing trend in the values of textit{ZT} at high temperature. For the crystallite size of 41 nm, value of textit{ZT} at 600 K was found to be $sim$0.017, which can be further increased up to $sim$0.045 around 650 K temperature. The predicted value of textit{ZT} suggests that LSMO can be suitable oxide material for thermoelectric applications at high temperature." @default.
- W2759631796 created "2017-10-06" @default.
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- W2759631796 date "2017-09-21" @default.
- W2759631796 modified "2023-10-03" @default.
- W2759631796 title "Effect of nanostructure on thermoelectric properties of La$_{0.7}$Sr$_{0.3}$MnO$_{3}$ in 300-600 K range" @default.
- W2759631796 hasPublicationYear "2017" @default.
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