Sodium ion ordering and vacancy cluster formation in NaxCoO2 (x=0.71 and 0.84) single crystals by synchrotron X-Ray diffraction.
Phys Rev Lett
; 101(12): 127404, 2008 Sep 19.
Article
en En
| MEDLINE
| ID: mdl-18851411
ABSTRACT
In the rich phase diagram of NaxCoO2, x=0.71 enjoys special stability and is called the Curie-Weiss metal due to its anomalous properties. Similarly, x=0.84 prepared from high temperature melt is a special end point beyond which the system phase separates. Using synchrotron x-ray diffraction on single crystals, we discovered sqrt[12]a and sqrt[13]a superlattice structures which we interpret as the ordering of Na (vacancy) clusters. These results lead to a picture of coexisting local moments and itinerant carriers and form the first step towards understanding the many anomalous properties of cobaltates.
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Banco de datos:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Año:
2008
Tipo del documento:
Article
País de afiliación:
Taiwán