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Electronic structure and magnetism of the diluted magnetic semiconductor Fe-doped ZnO nanoparticles
- Source :
- Journal of Applied Physics. 107(3):033718\_1-033718\_7
- Publication Year :
- 2010
- Publisher :
- American Institute of Physics, 2010.
-
Abstract
- We have studied the electronic structure of Fe-doped ZnO nanoparticles, which have been reported to show ferromagnetism at room temperature, by X-ray photoemission spectroscopy (XPS), resonant photoemission spectroscopy (RPES), X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD). From the experimental and cluster-model calculation results, we find that Fe atoms are predominantly in the Fe3+ ionic state with mixture of a small amount of Fe2+ and that Fe3+ ions are dominant in the surface region of the nanoparticles. It is shown that the room temperature ferromagnetism in the Fe-doped ZnO nanoparticles is primarily originated from the antiferromagnetic coupling between unequal amounts of Fe3+ ions occupying two sets of nonequivalent positions in the region of the XMCD probing depth of sim2-3 nm.<br />著者所属: 日本原子力研究開発機構(JAEA)
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 107
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.jairo.........bcded7b892ad069a8c2271a548040342