Physics – Condensed Matter – Materials Science
Scientific paper
2009-08-09
J.Phys. D: Appl. Phys. 42 (2009) 175406
Physics
Condensed Matter
Materials Science
7 pages, 5 figures, 2 tables, regular article
Scientific paper
10.1088/0022-3727/42/17/175406
We report the electronic structure studies of well characterized polycrystalline Zn_{1-x}Fe_xO (x = 0.0, 0.01, 0.03, and 0.05) nanorods synthesized by a co-precipitation method through x-ray absorption fine structure (XAFS). X-ray diffraction (XRD) reveals that Fe doped ZnO crystallizes in a single phase wurtzite structure without any secondary phase. From the XRD pattern, it is observed that peak positions shift towards lower 2\theta value with Fe doping. The change in the peak positions with increase in Fe contents clearly indicates that Fe ions are replacing Zn ions in the ZnO matrix. Linear combination fittings (LCF) at Fe K-edge demonstrate that Fe is in mixed valent state (Fe3+/Fe2+) with a ratio of ~ 7:3 (Fe3+:Fe2+). XAFS data is successfully fitted to wurtzite structure using IFEFFIT and Artemis. The results indicate that Fe substitutes Zn site in the ZnO matrix in tetrahedral symmetry.
Chae Kyu-Hyun
Gautam Sanjeev
Kumar Ravi
Kumar Sanjeev
Lee Chong Gyu
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