Kataoka, T. ; Kobayashi, M. ; Sakamoto, Y. ; Song, G. S. ; Fujimori, A. ; Chang, F.-H. ; Lin, H.-J. ; Huang, D. J. ; Chen, C. T. ; Ohkochi, T. ; Takeda, Y. ; Okane, T. ; Saitoh, Y. ; Yamagami, H. ; Tanaka, A. ; Mandal, S. K. ; Nath, T. K. ; Karmakar, D. ; Dasgupta, I. (2010) Electronic structure and magnetism of the diluted magnetic semiconductor Fe-doped ZnO nanoparticles Journal of Applied Physics, 107 (3). ISSN 0021-8979
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Official URL: https://doi.org/10.1063/1.3294620
Related URL: http://dx.doi.org/10.1063/1.3294620
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, resonant photoemission spectroscopy, x-ray absorption spectroscopy, 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 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 ≈ 2-3 nm
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics. |
| ID Code: | 140958 |
| Deposited On: | 11 Dec 2025 05:28 |
| Last Modified: | 11 Dec 2025 05:28 |
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