| Autor: |
Jian Qiu Deng, Zong Min Wang, Peng Cheng Yang, Qing Rong Yao, Yi Hao Shen |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
Key Engineering Materials. 727:403-409 |
| ISSN: |
1662-9795 |
| DOI: |
10.4028/www.scientific.net/kem.727.403 |
| Popis: |
Effect of Na doping on the structural and magnetic properties of La1-xNaxCoO3 (0≤x≤0.4) nanopowder samples synthesized by sol-gel method have been investigated. Rietveld crystal structure refinement of the X-ray diffraction data shows that La1−xNaxCoO3 (x≤0.3) crystallizes in the rhombohedral structure with space group . The lattice parameters decrease and the crystallite sizes increase with the increase of x. For the sample with x=0.4, a secondary hexagonal phase NaCo2O4 was observed. The zero field cooling (ZFC) and field cooling (FC) curve of the samples (x≤0.3) exhibit a paramagnetic-ferromagnetic transition with decreasing temperature. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
