Počet záznamů: 1

Phase diagram of the sodium-rich Na.sub.x./sub.CoO.sub.2./sub. cobaltates

  1. 1.
    0342613 - FZU-D 2011 RIV DE eng J - Článek v odborném periodiku
    Zorkovská, A. - Baran, A. - Kajňáková, M. - Feher, A. - Šebek, Josef - Šantavá, Eva - Lin, C. T. - Peng, J.B.
    Phase diagram of the sodium-rich NaxCoO2 cobaltates.
    Physica Status Solidi B-Basic Solid State Physics. Roč. 247, č. 3 (2010), s. 665-667 ISSN 0370-1972
    Výzkumný záměr: CEZ:AV0Z10100520
    Klíčová slova: cobaltates * specific heat * magnetic phase transition * A-type antiferromagnetism
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 1.344, rok: 2010

    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.
    Trvalý link: http://hdl.handle.net/11104/0185304