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Local environment of Mn dopant in ZnO by near-edge x-ray absorption fine structure analysis

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5 Author(s)
Kunisu, Masahiro ; Department of Materials Science and Engineering, Kyoto University, Yoshida, Sakyo, Kyoto 606-8501, Japan ; Oba, Fumiyasu ; Ikeno, Hidekazu ; Tanaka, Isao
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High-resolution near-edge x-ray absorption fine structure (NEXAFS) at Mn K edge is employed to probe the local environment of Mn dopant in ZnO. First-principles supercell calculations are systematically made to obtain theoretical NEXAFS. Mn is found to substitute for Zn up to 5 at.%Mn in polycrystalline samples sintered at 1623 K in air. Presence of Mn3O4 is apparent for samples with higher Mn content. The NEXAFS does not change in the range of Mn concentration from 0.01 to 5 at. %, indicating the absence of Mn precipitates. The results are confirmed by examining the polarization dependence of the NEXAFS for a 5 at. %-doped ZnO thin film.

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Applied Physics Letters  (Volume:86 ,  Issue: 12 )