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Spin-entropy contribution to thermopower in the [Ca.sub.2./sub.CoO.sub.3-t./sub. ].sub.0.62./sub.(CoO.sub.2./sub.) misfits
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SYSNO ASEP 0449628 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Spin-entropy contribution to thermopower in the [Ca2CoO3-t ]0.62(CoO2) misfits Author(s) Hejtmánek, Jiří (FZU-D) RID, ORCID
Jirák, Zdeněk (FZU-D) RID, ORCID, SAI
Šebek, Josef (FZU-D) RIDSource Title Physical Review. B - ISSN 1098-0121
Roč. 92, č. 12 (2015), "125106-1"-"125106-11"Number of pages 11 s. Language eng - English Country US - United States Keywords thermoelectric and thermomagnetic effects ; galvanomagnetic and other magnetotransport effects ; thermal properties of crystalline solids Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GA13-17538S GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 UT WOS 000360425700005 EID SCOPUS 84942475469 DOI 10.1103/PhysRevB.92.125106 Annotation Two samples of the [Ca2CoO3-t ]0.62(CoO2) misfit cobaltate, often denoted as the Ca3Co4O9 phase, were prepared from the same ceramic material by oxygen and argon annealing, resulting in different carrier concentrations in the conducting CoO2 layers, n = 0.31 and 0.19 hole/Co, respectively. Electrical and thermal transport properties were studied in dependence of magnetic field up to 140 kOe. The magnetothermopower data reveal an extra spin-entropy contribution to the Seebeck coefficient that is not expected for carriers of Fermi liquid character. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2016
Number of the records: 1