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Please use this identifier to cite or link to this item: http://dyuthi.cusat.ac.in/purl/4414

Title: Colossal thermoelectric power in Gd-Sr manganites
Authors: Anantharaman, M R
Sagar, S
Ganesan, V
Joy, P A
Senoy, Thomas
Liebig, A
Albrecht, M
Issue Date: 30-Jul-2010
Publisher: IOP Publishing LTD
Abstract: Manganites belonging to the series Gd1−xSrxMnO3 (x=0.3, 0.4 and 0.5) were prepared by wet solid-state reaction and their thermoelectric power was evaluated. Thermoelectric power measurements revealed a peak value at ∼40 K. All the samples exhibited a colossal thermopower at ∼40K and in that Gd0.5Sr0.5MnO3 exhibited a maximum value of ∼35mV/K, which is the largest reported for these class of materials at this temperature. Temperaturedependent magnetisation measurements showed that the samples exhibit a phase transition from paramagnetic to spin-glass–like state at these temperatures. Plausible mechanisms responsible for the observed colossal thermoelectric power in Gd-Sr manganites are discussed
Description: EPL (Europhysics Letters),vol 91,issue 1,17008
URI: http://dyuthi.cusat.ac.in/purl/4414
Appears in Collections:Dr. M R Anantharaman

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