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Calcium-induced cation ordering and large resistivity decrease in Pr.sub.0.3./sub.CoO.sub.2./sub.

SYSNO ASEP	0466138
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Calcium-induced cation ordering and large resistivity decrease in Pr_0.3CoO₂
Author(s)	Brázda, Petr (FZU-D)_{RID, ORCID} Palatinus, Lukáš (FZU-D)_{RID, ORCID} Drahokoupil, Jan (FZU-D)_{RID, ORCID} Knížek, Karel (FZU-D)_{RID, ORCID} Buršík, Josef (UACH-T)_{RID, ORCID, SAI}
Number of authors	5
Source Title	Journal of Physics and Chemistry of Solids. - : Elsevier - ISSN 0022-3697 Roč. 96-97, Sep (2016), s. 10-16
Number of pages	7 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	thermoelectric cobaltate ; Pr_xCoO₂ ; electron diffraction tomography ; powder X-ray diffraction ; cobalt oxide
Subject RIV	BM - Solid Matter Physics ; Magnetism
Subject RIV - cooperation	Institute of Inorganic Chemistry - Inorganic Chemistry
R&D Projects	GA13-03708S GA ČR - Czech Science Foundation (CSF)
Institutional support	FZU-D - RVO:68378271 ; UACH-T - RVO:61388980
UT WOS	000378960700002
EID SCOPUS	84966441027
DOI	10.1016/j.jpcs.2016.04.012
Annotation	Structure of layered cobaltates Pr0.3CoO2 and (PrCa)0.3CoO2 were investigated by electron diffraction tomography and powder X-ray diffraction. The effect of the calcium substitution on thermoelectric properties was evaluated. The structure consists of hexagonal sheets of edge-sharing CoO6 octahedra interleaved by cationic monolayers. The cations form a 2-dimensional a√3×a√3 superstructure in the a–b plane. While Pr0.3CoO2 showed no layer order in the [001] direction, introduction of calcium resulted in the formation of a superstructure spanning over six cationic layers along the [001]. This superstructure model appears to be valid also for the description of the superstructures of CaxCoO2 and SrxCoO2 with x about 1/3.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2017

Number of the records: 1