| Autor: |
Tingjing Hu, Xiaoyan Cui, Jingshu Wang, Xin Zhong, Yinzhu Chen, Junkai Zhang, Xuefei Li, Jinghai Yang, Chunxiao Gao |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
Crystals, Vol 8, Iss 2, p 98 (2018) |
| Druh dokumentu: |
article |
| ISSN: |
2073-4352 |
| DOI: |
10.3390/cryst8020098 |
| Popis: |
The high-pressure transport behavior of CaF2 nanoparticles with 3 mol% Tb concentrations was studied by alternate-current impedance measurement. All of the electrical parameters vary abnormally at approximately 10.76 GPa, corresponding to the fluorite-cotunnite structural transition. The substitution of Ca2+ by Tb3+ leads to deformation in the lattice, and finally lowers the transition pressure. The F− ions diffusion, electronic transport, and charge-discharge process become more difficult with the rising pressure. In the electronic transport process, defects at grains play a dominant role. The charge carriers include both F− ions and electrons, and electrons are dominant in the transport process. The Tb doping improves the pressure effect on the transport behavior of CaF2 nanocrystals. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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