| Autor: |
Hao-Bo Li, Xinjian Xie, Weichao Wang, Yahui Cheng, Wei-Hua Wang, Luyan Li, Hui Liu, Gehui Wen, Rongkun Zheng |
| Jazyk: |
angličtina |
| Rok vydání: |
2013 |
| Předmět: |
|
| Zdroj: |
APL Materials, Vol 1, Iss 4, Pp 042106-042106 (2013) |
| Druh dokumentu: |
article |
| ISSN: |
2166-532X |
| DOI: |
10.1063/1.4824037 |
| Popis: |
Cu/Cu2O core-shell nanoparticles with diameters around 8–9 nm have been fabricated by magnetron sputtering pure Cu targets with subsequent annealing in oxygen. Room-temperature ferromagnetism (FM) was observed in the samples annealed at 150 °C for 10–120 min. The maximum of saturated magnetization is as high as 19.8 emu/cc. The photoluminescence spectra show solid evidence that the FM originates from Cu vacancies in the Cu2O shell of the Cu/Cu2O core-shell nanoparticles. Furthermore, the FM can be modulated by the amount of Cu vacancies through the Cu/Cu2O core-shell interface engineering. Fundamentally, the FM can be understood by the charge-transfer ferromagnetism model based on Stoner theory. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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