Vacancy-Mediated Magnetism in Pure Copper Oxide Nanoparticles
Room temperature ferromagnetism (RTF) is observed in pure copper oxide (CuO) nanoparticles which were prepared by precipitation method with the post-annealing in air without any ferromagnetic dopant. X-ray photoelectron spectroscopy (XPS) result indicates that the mixture valence states of Cu1+ and Cu2+ ions exist at the surface of the particles. Vacuum annealing enhances the ferromagnetism (FM) of CuO nanoparticles, while oxygen atmosphere annealing reduces it. The origin of FM is suggested to the oxygen vacancies at the surface/or interface of the particles. Such a ferromagnet without the presence of any transition metal could be a very good option for a class of spintronics.
- Vacancy-Mediated Magnetism in Pure Copper Oxide Nanoparticles
- Open Access
- Available under Open Access This content is freely available online to anyone, anywhere at any time.
Nanoscale Research Letters
Volume 5, Issue 4 , pp 769-772
- Cover Date
- Print ISSN
- Online ISSN
- Additional Links
- X-ray photoelectron spectroscopy
- Room temperature ferromagnetism
- Industry Sectors