Chemical, Structural, and Transport Properties of Na1-xCoO2

Details Chemical, Structural, and Transport Properties of Na1-xCoO2 Chemical, Structural, and Transport Properties of Na1-xCoO2

2003-04-21

arxiv.org/abs/cond-mat/0304455v1

Physics

Condensed Matter

Materials Science

11 pages, 7 figures, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.68.075108

We report measurement of room-temperature compressibility, thermal expansion, thermoelectric power a(T) at various pressures P < 20 kbar, basal-plane resistivity rab (T), magnetic susceptibility and thermal conductivity k(T) taken on single-crystal or cold-pressed Na0.57CoO2. An enhancement of a large thermopower with a change of slope occurs on heating near 100 K, but this enhancement is progressively suppressed by pressure. The c-axis thermal expansion is large in the interval 150 K

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