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Title: Effects of MnO doping on the electronic properties of zinc oxide: 406 GHz electron paramagnetic resonance spectroscopy and Newman superposition model analysis

MnO-doped ZnO ceramics have been synthesized through the conventional ceramic processing route. Mn{sup 2+} ions have been incorporated into the ZnO lattice within the limits of solid solubility. By using X-band-frequency and high-field electron paramagnetic resonance (EPR), we have resolved some of the main electronic transitions for the S = 5/2, I = 5/2 high-spin system and have determined accurately the EPR spin-Hamiltonian parameters. By combining data from crystallographic X-ray diffraction and EPR with the semi-empirical Newman superposition model, we have found the local configurational position of Mn{sup 2+} and have confirmed the symmetry of the lattice. The results presented in this contribution indicate that Mn ions substitute at Zn sites in ZnO. The effect of Mn{sup 2+} ions on the intrinsic defects becomes remarkable, thus the vacancy related intrinsic defect signals cannot be visible in the EPR spectrum. MnO doping affects the band gap energy of ZnO system which was confirmed via UV-Vis spectroscopy.
Authors:
;  [1] ;  [2] ; ;  [3]
  1. Engineering Faculty, Metallurgical and Materials Engineering Department, Istanbul University, Avcılar, 34320 Istanbul (Turkey)
  2. Faculty of Arts and Sciences, Bahcesehir University, Besiktas, 34349 Istanbul (Turkey)
  3. Institut für Physikalische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstr. 21, 79104 Freiburg (Germany)
Publication Date:
OSTI Identifier:
22492900
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CERAMICS; CRYSTALLOGRAPHY; DOPED MATERIALS; ELECTRON SPIN RESONANCE; GHZ RANGE 100-1000; HAMILTONIANS; MANGANESE IONS; MANGANESE OXIDES; PROCESSING; SIGNALS; SOLIDS; SOLUBILITY; SPECTRA; SPECTROSCOPY; SPIN; SYMMETRY; VACANCIES; X-RAY DIFFRACTION; ZINC OXIDES