Figure 5

Frequency dependence of layer thermal conductivities of CoO2 layers. (a–c) Layer thermal conductivities of CoO2 layers in NaxCoO2 (x = 1.0, 0.5) and Ca3Co4O9 at 300 K in (a) X, (b) Y, and (c) Z directions as a function of frequency.

Frequency dependence of layer thermal conductivities of CoO2 layers. (a–c) Layer thermal conductivities of CoO2 layers in NaxCoO2 (x = 1.0, 0.5) and Ca3Co4O9 at 300 K in (a) X, (b) Y, and (c) Z directions as a function of frequency.