Non-Fermi-liquid behavior in the layered Na x Co O 2

The specific heat in the temperature region from 100 mK to 360 K and in magnetic fields of 0 and 9 T and the susceptibility from 2 to 360 K and in a magnetic field of 1 T are measured in the layered Na x Co O 2 ( x = 0.65 , 0.70, and 0.75) oxides. Analysis of the data revealed non-Fermi-liquid behav...

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Bibliographic Details
Published in:Low temperature physics (Woodbury, N.Y.) N.Y.), 2007-11, Vol.33 (11), p.944-947
Main Authors: Zorkovská, A., Feher, A., Šebek, J., Šantavá, E., Bradaric, I.
Format: Article
Language:English
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Summary:The specific heat in the temperature region from 100 mK to 360 K and in magnetic fields of 0 and 9 T and the susceptibility from 2 to 360 K and in a magnetic field of 1 T are measured in the layered Na x Co O 2 ( x = 0.65 , 0.70, and 0.75) oxides. Analysis of the data revealed non-Fermi-liquid behavior. The character of the observed anomalies seems to be connected to the mesoscopic phase separation, underlining the impact of disorder on the low-lying excitations in cobaltates.
ISSN:1063-777X
1090-6517
DOI:10.1063/1.2747070