Abstract
We measured and analyzed the transport properties of single-crystal , which is a metallic transition-metal oxide consisting of a two-dimensional triangle lattice of Co. Reflecting the crystal structure, the resistivity is highly anisotropic between in- and out-of-plane directions, and the in-plane resistivity is as low as 200 cm at 300 K. Most strikingly, the in-plane thermoelectric power of is about 100 V/K at 300 K, which is nearly ten times larger than that of typical metals. The large thermoelectric power and the low resistivity suggest that is a potential thermoelectric material.
- Received 18 July 1997
DOI:https://doi.org/10.1103/PhysRevB.56.R12685
©1997 American Physical Society