| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1459051 | Ceramics International | 2016 | 5 Pages |
Abstract
Effects of (Lu, Ni) co-doping on spin entropy of Ca3Co4O9+δ have been investigated. Results of this study show that (Lu, Ni) co-doping can be more effective than single Lu doping for optimizing the spin entropy of Ca3Co4O9+δ. X-ray photo-emission spectroscopy confirms a reduction in Co4+ concentration, which leads to enhanced spin entropy from Co sites. The magnetic ions of Ni with unpaired 3d electrons can produce extra spin entropy through a new hopping model, thereby contributing to an increase in total spin entropy. Incorporating magnetic ions is an effective way to optimize the spin entropy of thermoelectric materials. This study opens a new way to broaden and design prospective thermoelectric materials.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Wenchao Yang, Huicheng Zhang, Jiaqing Tao, Dongdong Zhang, Dewei Zhang, Zhihe Wang, Guodong Tang,