Journal
JOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS
Volume 15, Issue 12, Pages 1494-1501Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jno.2020.2892
Keywords
Nano-Particles; Cu3N; Ferromagnetism; Surface Defects
Funding
- National Natural Science Foundation of China [12004146]
- China Postdoctoral Science Foundation [2020M683607]
- Fundamental Research Funds for the Central Universities [LZUMMM2020007, lzujbky-2020-pd07]
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In recent years, ferromagnetism induced by natural defects of nonmagnetic semiconductors has been widely investigated and expected to be applied in spintronics. On this basis, we report the ferromagnetic behavior of copper (I) nitride (Cu3N) nanoparticles. A robust room temperature ferromagnetism is found in Cu3N nanoparticles with the saturated magnetization of 4 memu/g (300 K). Based on the element-specific X-ray magnetic circular dichroism (XMCD) and the density functional theory (DFT) analysis, it is concluded that the ferromagnetism of Cu3N nanoparticles originate from the surface Cu vacancies. Moreover, by increasing the surface area of Cu3N, the variation of magnetism is realized, and the surface states related to ferromagnetism is further revealed.
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