Nano Archive

Vacancy-Mediated Magnetism in Pure Copper Oxide Nanoparticles

Gao, Daqiang and Zhang, Jing and Zhu, Jingyi and Qi, Jing and Zhang, Zhaohui and Sui, Wenbo and Shi, Huigang and Xue, Desheng (2010) Vacancy-Mediated Magnetism in Pure Copper Oxide Nanoparticles. Nanoscale Research Letters, 5 (4). pp. 769-772. ISSN 1931-7573 (Print) 1556-276X (Online)

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Official URL: http://www.springerlink.com/content/r4mr6701528762...

Abstract

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.

Item Type:Article
Uncontrolled Keywords:CuO - Nanoparticles - X-ray photoelectron spectroscopy - Room temperature ferromagnetism
Subjects:Analytical Science > Microscopy and probe methods
Physical Science > Nano objects
Physical Science > Nanoelectronics
Physical Science > Nanomagnetics
ID Code:8825
Deposited By:IoN
Deposited On:15 Jul 2010 09:57
Last Modified:15 Jul 2010 09:57

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