| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1591381 | Solid State Communications | 2016 | 5 Pages |
Abstract
We have studied Ru-doping effect on the thermopower and electrical transport properties of Ca3Co4O9+δ samples. A thermopower in Ca3Co4âxRuxO9+δ was enhanced by Ru doping. A clear field-induced suppression of thermopower implies a large spin entropy contribution. Magnetic results indicate that the spin entropy enhancement originates from the decrease of Co4+ concentration induced by Ru-doping. The increase of resistivity results from the decreases of carrier concentration and mobility. The electrical transport properties reveal that Ru-doping induces a metal-insulator transition at xâ0.2 and the thermally activated mechanism dominates the transport behavior at low temperature.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Dewei Zhang, Zhihe Wang, Xibin Xu, Xiaonong Xu, Li Qiu, Qisheng Wu, Youwei Du,