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611435 
Journal Article 
Spin correlations and cobalt charge states: phase diagram of sodium cobaltates 
Lang, G; Bobroff, J; Alloul, H; Collin, G; Blanchard, N 
2008 
1 
Physical Review B (Condensed Matter and Materials Physics)
ISSN: 1098-0121
EISSN: 1550-235X 
78 
15 
155116 (155112 pp.) 
WOS:000260574400055 
Using /sup 23/Na NMR measurements on sodium cobaltates at intermediate dopings (0.44x*. It is suggested that at a given x the ferromagnetic correlations might dominate the antiferromagnetic ones above T*. From /sup 59/Co NMR data, it is shown that moving toward higher x away from x=0.5 results in the progressive appearance of nonmagnetic Co/sup 3+/ sites, breaking the homogeneity of Co states encountered for x
IRIS
• Cobalt
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