Thermoelectric properties of filling controlled manganites

Kuwahara, H.; Hirobe, Y.; Nagayama, J.; Kodama, S.; Kakishima, A.

doi:10.1016/j.jmmm.2003.12.1048

Cited by 3 publications

(1 citation statement)

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“…Two reasons make these materials of great relevance. Firstly, the TEP materials can recover waste heat and transform it to electrical current through the Seebeck effect (S) [1,2] The conversion efficiency of this process is determined through the figure of merit (ZT) dimensionless factor (ZT = S 2 q À1 j À1 T, where q is the electrical resistivity, j is the thermal conductivity and T is the absolute temperature. Secondly, extensive research work in manganites [3][4] shows that these materials can be used in magnetic cooling technology.…”

Section: Introductionmentioning

confidence: 99%

Thermopower and magnetocaloric properties in NdSrMnO/CrO3 composites

Ahmed

Mohamed

Paixão

et al. 2018

Journal of Magnetism and Magnetic Materials

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The thermoelectric power (TEP) and magnetocaloric effect (MCE) for (Nd 0.6 Sr 0.4 MnO 3 ) 1-x /(CrO 3 ) x composites have been measured. The TEP measurements show a negative sign value of the Seebeck coefficient (S), in microvolts. TEP data construe in the low range of temperature by the magnon and phonon drag model, whereas at high temperature by small polaron conduction mechanism. Magnetic measurements exhibit that all composites show a paramagnetic-ferromagnetic transition with decreasing temperature. The Arrott plots of composites reveal the occurrence of a second order phase transition. The maximum value of magnetic entropy change (DS) is 2.37 J kg À1 K À1 , achieved fore the composite with x = 0.015. Moreover, the maximum value of relative cooling power (RCP) is 122.1 J kg À1 , achieved for the composite with x = 0.020. These composites may be appropriate for magnetic application near room temperature.

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Section: Introductionmentioning

confidence: 99%