TITLE

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

AUTHOR(S)
Kunisu, Masahiro; Oba, Fumiyasu; Ikeno, Hidekazu; Tanaka, Isao; Yamamoto, Tomoyuki
PUB. DATE
March 2005
SOURCE
Applied Physics Letters;3/21/2005, Vol. 86 Issue 12, p121902
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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.
ACCESSION #
16581767

 

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