Thermal conductivity of the A_xBO_2 type layered oxides Na_0.77MnO_2 and LiCoO_2

Details Thermal conductivity of the A_xBO_2 type layered oxides Na_0.77MnO_2 and LiCoO_2 Thermal conductivity of the A_xBO_2 type layered oxides Na_0.77MnO_2 and LiCoO_2

2001-08-21

arxiv.org/abs/cond-mat/0108327v1

Physics

Condensed Matter

Strongly Correlated Electrons

2 pages, 2 figures, ReVTeX4 style submitted to Jpn. J. Appl. Phys

Scientific paper

10.1143/JJAP.41.763

We prepared polycrystalline samples of the A_xBO_2 type layered oxides Na_0.77MnO_2 and LiCoO_2, and measured thermal conductivity from 15 to 280 K. Na0.77MnO_2 shows a low thermal conductivity of 15 mW/cmK, while LiCoO_2 shows a much higher value of 40 mW/cmK at 280 K. By comparing them with the data of NaCo_2O_4, we have found that the low thermal conductivity of A_xBO_2 comes essentially from the A-ion deficiency, not from the layered structure itself.

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