| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8943346 | Journal of Alloys and Compounds | 2019 | 7 Pages |
Abstract
Ruddlesden-Popper layered Ca3Ti2O7 (CTO) and Ca2.85Na0.15Ti2O7 (CNTO) ceramics were successfully prepared by a conventional solid-state reaction process. The ferroelectric coercive field greatly decreased via Na doping. Interestingly, a diode-like electric transport effect was observed in the CNTO sample, which is most likely due to a newly formed p-n junction caused by the applied electric field. Optical characterization by UV-visible absorption showed a decrease of band gap from 3.55 to 3.41eV via Na doping. First-principles calculation showed a similar decreasing trend which confirmed the experimental results.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
C. Huang, Winnie Wong-Ng, W.F. Liu, X.N. Zhang, Y. Jiang, P. Wu, B.Y. Tong, H. Zhao, S.Y. Wang,