| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1811217 | Physica B: Condensed Matter | 2011 | 5 Pages |
Abstract
Layered misfit cobaltite Bi2Ca2.4Co2Oy has been synthesized by a sol–gel method. This compound exhibits large thermoelectric (TE) power (S300 K∼170 μV K−1), low resistivity (ρ300 K∼42 mΩ cm) and relatively small thermal conductivity (κ300 K∼2.8 W K−1 m−1) at room temperature. Furthermore, the resistivity of this compound displays a metallic behavior above T⁎∼150 K with a semiconducting behavior below this temperature. This abnormal behavior in resistivity is analogous to those observed in Sr and Ba based misfit cobaltites. The observed features of the TE have been discussed based on the narrow band model.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
L.H. Yin, R. Ang, L.J. Li, B.C. Zhao, Y.K. Fu, X.B. Zhu, Z.R. Yang, W.H. Song, Y.P. Sun,