Transport Properties in (Na,Ca)Co_2O_4 Ceramics

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dc.creatorItoh, T.
dc.creatorKawata, T.
dc.creatorKitajima, T.
dc.creatorTerasaki, I.
dc.date1999-08-03
dc.date.accessioned2026-07-07T03:14:07Z
dc.date.available2026-07-07T03:14:07Z
dc.descriptionThe resistivity and thermopower of polycrystalline (Na,Ca)Co_2O_4 were measured and analyzed. Both the quantities increase with x, suggesting that the carrier density is decreased by the substitutions of Ca^{2+} for Na^{+}. Considering that the temperature dependence of the resistivity show a characteristic change with x, the conduction mechanism is unlikely to come from a simple electron-phonon scattering. As a reference for NaCo_2O_4, single crystals of a two-dimensional Co oxide (Bi,Pb)_2M_3Co_2O_9 (M=Sr and Ba) were studied. The Pb substitution decreases the resistivity, leaving the thermopower nearly intact.
dc.descriptionLaTex 2.06 eith epsf style, 3 pages, 6 eps figures
dc.identifierhttps://arxiv.org/abs/cond-mat/9908039
dc.identifierhttp://arxiv.org/abs/cond-mat/9908039
dc.identifierProc. of 17th International Conference on Thermoelectrics (1998) p.595
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/29554
dc.subjectStrongly Correlated Electrons
dc.titleTransport Properties in (Na,Ca)Co_2O_4 Ceramics
dc.typetext

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