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Magnetic and magnetotransport properties of misfit cobaltate Ca.sub.3./sub.Co.sub..3.93./sub.O.sub.9+δ./sub..
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SYSNO ASEP 0379113 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Magnetic and magnetotransport properties of misfit cobaltate Ca3Co.3.93O9+δ. Author(s) Hejtmánek, Jiří (FZU-D) RID, ORCID
Knížek, Karel (FZU-D) RID, ORCID
Maryško, Miroslav (FZU-D) RID
Jirák, Zdeněk (FZU-D) RID, ORCID, SAI
Sedmidubský, D. (CZ)
Jankovský, O. (CZ)
Huber, Š. (CZ)
Masschelein, P. (FR)
Lenoir, B. (FR)Source Title Journal of Applied Physics. - : AIP Publishing - ISSN 0021-8979
Roč. 111, č. 7 (2012), "07D715-1"-"07D715-3"Number of pages 3 s. Language eng - English Country US - United States Keywords low temperature thermoelectric power ; magnetic properties Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GA203/09/1036 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10100521 - FZU-D (2005-2011) UT WOS 000303282401178 DOI 10.1063/1.3677312 Annotation Samples of Ca3Co3.93O9+δ, prepared by classical ceramic route (CCR) and spark plasma sintering (SPS), were characterized by means of magnetic, electrical, and thermal experiments in a broad temperature range. The low temperature specific heat measured down to 0.3 K, reveals two important electronic contributions: the first one, dominated by magnetic excitations, that can be suppressed by an external magnetic field, and the second, due to band-like carriers, characterized by γ~50 mJ mol-1 K-1 for both samples. The ferrimagnetism, associated with the long-range magnetic order of IS Co3+ species in rock-salt blocks detected below TF~15 K in the CCR samples, is absent in the SPS samples. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2013
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