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Phase diagram of the sodium-rich Na.sub.x./sub.CoO.sub.2./sub. cobaltates
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SYSNO ASEP 0342613 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Phase diagram of the sodium-rich NaxCoO2 cobaltates Author(s) Zorkovská, A. (SK)
Baran, A. (SK)
Kajňáková, M. (SK)
Feher, A. (SK)
Šebek, Josef (FZU-D) RID
Šantavá, Eva (FZU-D) RID, ORCID
Lin, C. T. (DE)
Peng, J.B. (DE)Source Title Physica Status Solidi B : Basic Solid State Physics. - : Wiley - ISSN 0370-1972
Roč. 247, č. 3 (2010), s. 665-667Number of pages 3 s. Language eng - English Country DE - Germany Keywords cobaltates ; specific heat ; magnetic phase transition ; A-type antiferromagnetism Subject RIV BM - Solid Matter Physics ; Magnetism CEZ AV0Z10100520 - FZU-D (2005-2011) UT WOS 000276339600050 DOI 10.1002/pssb.200983032 Annotation Specific heat of layered NaxCoO2 single crystals (x=0.76–0.87) down to 100mK and the dc-susceptibility down to 2K in magnetic field applied parallel to the layers has been measured. Non-Fermi liquid (NFL) features observed in Na concentration dependent temperature region have been analyzed and discussed in terms of disorder induced NFL behavior with quantum Griffiths phases in the background. The phase diagram is proposed, the results indicate possible quantum critical point below x=0.7 and closeness to metal–insulator transition at doping above x=0.87. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2011
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