Analysis of Raman modes in Mn-doped ZnO nanocrystals

Details Analysis of Raman modes in Mn-doped ZnO nanocrystals Analysis of Raman modes in Mn-doped ZnO nanocrystals

2010-09-15

arxiv.org/abs/1009.2870v1

Physics

Condensed Matter

Materials Science

4 pages, 4 figures

Scientific paper

10.1002/pssb.200945192

Mn-doped ZnO was synthesized using a co-precipitation technique. X-ray diffraction (XRD) measurements and photoluminescence (PL) spectra show that Mn ions are doped into the lattice positions of ZnO. The modes at 202, 330, and 437 cm-1 in the Raman spectrum are assigned as 2E2 (low), E2 (high)-E2 (low), and E2 (high) modes of ZnO base, respectively. The mode at 528 cm-1 is ascribed to a local vibrational mode related to Mn. The mode at 580 cm-1 should be an intrinsic mode of ZnO and assigned to E1 longitudinal optical (LO). Its reinforcement should result from a combination of resonance at the excitation wavelength and impurity-induced scattering.

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