La0.95Sr0.05CoO3: An efficient room-temperature thermoelectric oxide

Abstract

We present measurements of electrical resistivity, thermal conductivity and thermopower of polycrystalline Sr-doped LaCoO3 with composition La0.95Sr0.05CoO3. Our data show that the investigated compound exhibits a very respectable room temperature thermoelectric figure of merit value of 0.18. Our results not only show that oxides are promising candidates for thermoelectric cooling applications, but also point towards the need for careful theoretical calculations that will serve as a guide in producing the next generation of thermoelectric materials.

arXiv comment13 pages, 3 figures, Accepted in Appl. Phys. Lett. scheduled to appear on Feb 17, 2004 issue

References in corpus (2)

• Low thermal conductivity of the layered oxide (Na,Ca)Co_2O_4: Another example of a phonon glass and an electron crystal
• Transport and Magnetic Properties of R1-xAxCoO3 (R=La, Pr and Nd; A=Ba, Sr and Ca)

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• Thermoelectric Properties of (1-x)LaCoO${}_{3.x}$La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$ Composite
• Magnetic and transport properties of the spin-state disordered oxide La0.8Sr0.2Co_{1-x}Rh_xO_{3-δ}
• Effect of interface resistance on thermoelectric properties in (1-x)La${}_{0.95}$Sr${}_{0.05}$Co${}_{0.95}$Mn${}_{0.05}$O${}_3$/(x)WC composite
• Improved Thermoelectric Properties in (1-x)LaCoO3/(x)La0.7Sr0.3CoO3 Composite