Cobaltites as perspective thermoelectrics

0041766 - FZÚ 2007 RIV US eng C - Conference Paper (international conference)
Hejtmánek, Jiří - Veverka, Miroslav - Knížek, Karel - Fujishiro, H. - Herbert, S. - Klein, Y. - Maignan, A. - Bellouard, C. - Lenoir, B.
Cobaltites as perspective thermoelectrics.
[Kobaltity jako perspektivní termoelektrika.]
Materials and Technologies for Direct Thermal-to-Electric Energy Conversion, 2005 MRS Fall Meeting. Warrendale: Materials Research Society, 2006 - (Yang, J.; Hogan, T.; Funahashi, R.; Nolas, G.), F01/07.1-F01/07.9. MRS Symposium Proceedings Series, Vol. 886. ISBN 1-55899-840-3. ISSN 0272-9172.
[Materials and Technologies for Direct Thermal-to-Electric Energy Conversion, 2005 MRS Fall Meeting. Boston (US), 28.11.2005-02.12.2005]
R&D Projects: GA ČR(CZ) GA203/03/0924
Grant - others:MŠMT, FR(XE) BARRANDE 2005-2006-020-1
Institutional research plan: CEZ:AV0Z10100521
Keywords : cobalt oxides * thermoelectric power * thermal conductivity
Subject RIV: BM - Solid Matter Physics ; Magnetism

Aiming the thermoelectric applications at high temperatures the Co³⁺/Co⁴⁺ oxides with 1D, 2D and 3D dimensionality of CoO₆ octahedral building network were studied. This comparative experimental study of electrically conducting complex cobaltites is based on magnetic, transport and thermal characterization. Spin fluctuations are shown to be the efficient scatters for thermal conductivity in cobalt parovskites.

S ohledem na vysokoteplotní termoelektrické aplikace byly studovány Co³⁺/Co⁴⁺ oxidy s těsným uspořádáním CoO₆ oktahedrů v 1,2 nebo 3 směrech. Experimentální studie je založena na magnetické, transportní a tepelné charakterizaci materiálů mezi 10 - 1100 K. Je ukázáno, že spinové fluktuace vedou k významnému snížení tepelné vodivosti.
Permanent Link: http://hdl.handle.net/11104/0135143