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A simple sonochemical approach of Mn2+ doped ZnO nanopowder: structural, optical and magnetic studies

Title
A simple sonochemical approach of Mn2+ doped ZnO nanopowder: structural, optical and magnetic studies
Author
박진섭
Keywords
ROOM-TEMPERATURE FERROMAGNETISM; ASSISTED SYNTHESIS; INFRARED-SPECTRA; ZINC-OXIDE; FILMS; IONS; NANOCRYSTALS; LUMINESCENCE; NANORODS; GLASSES
Issue Date
2016-01
Publisher
SPRINGER
Citation
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, v. 27, NO 1, Page. 191-197
Abstract
Mn2+ doped ZnO nanopowder was prepared by simple sonochemical method. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, optical absorption (UV-Vis), photoluminescence (PL), Electron Paramagnetic Resonance (EPR), Fourier transform infrared (FT-IR) spectroscopy and magnetization have been used to characterize the sample. XRD study revealed that Mn2+ doped ZnO had wurtzite hexagonal structure. Composition analysis by EDX indicated the presence of small amounts of manganese. Crystal field (Dq) and interelectronic repulsion (B, C) parameters are evaluated from optical absorption. Spin-Hamiltonian and bonding parameters are evaluated from the EPR study. Optical and EPR confirms that the Mn2+ entered into ZnO lattice as distorted octahedral site symmetry. FT-IR spectrum exhibited vibrational bands of Zn-O bonds. PL spectrum shows the emission bands in UV and visible region. Magnetization loop was measured and clearly shows typical ferromagnetic saturation behavior. The results suggest oxygen vacancies, especially singly ionized oxygen vacancies, play a crucial role in mediating ferromagnetism in the Mn doped ZnO system.
URI
https://link.springer.com/article/10.1007%2Fs10854-015-3736-2http://hdl.handle.net/20.500.11754/30571
ISSN
0957-4522; 1573-482X
DOI
10.1007/s10854-015-3736-2
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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