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Title: Electronic structure, magnetic and structural properties of Ni doped ZnO nanoparticles

Highlights: • XRD, and HR-TEM results show the single phase nature of Ni doped ZnO nanoparticles. • dc magnetization results indicate the RT-FM in Ni doped ZnO nanoparticles. • Ni L{sub 3,2} edge NEXAFS spectra infer that Ni ions are in +2 valence state. • O K edge NEXAFS spectra show that O vacancy increases with Ni doping in ZnO. - Abstract: We report structural, magnetic and electronic structural properties of Ni doped ZnO nanoparticles prepared by auto-combustion method. The prepared nanoparticles were characterized by using X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), near edge X-ray absorption fine structure (NEXAFS) spectroscopy, and dc magnetization measurements. The XRD and HR-TEM results indicate that Ni doped ZnO nanoparticles have single phase nature with wurtzite lattice and exclude the presence of secondary phase. NEXAFS measurements performed at Ni L{sub 3,2}-edges indicates that Ni ions are in +2 valence state and exclude the presence of Ni metal clusters. O K-edge NEXAFS spectra indicate an increase in oxygen vacancies with Ni-doping, while Zn L{sub 3,2}-edge show the absence of Zn-vacancies. The magnetization measurements performed at room temperature shows that pure and Ni doped ZnO exhibits ferromagnetic behavior.
Authors:
 [1] ;  [2] ;  [3] ; ;  [2] ;  [3] ;  [4] ;  [5]
  1. School of Materials Science and Engineering, Changwon National University, 9 Sarim dong, Changwon 641 773 (Korea, Republic of)
  2. Material Science Research Laboratory, Department of Physics, S. V. College, Aligarh 202001, Uttar Pradesh (India)
  3. Advanced Analysis Center, Korea Institute of Science and Technology, Seoul 136-791 (Korea, Republic of)
  4. Department of Applied Physics, Aligarh Muslim University, Aligarh 202-002 (India)
  5. Department of Mechatronics Convergence, College of Engineering, Changwon National University, Changwon 641 773 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22420637
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 59; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTROSCOPY; DOPED MATERIALS; ELECTRONIC STRUCTURE; FINE STRUCTURE; INDIUM FLUORIDES; MAGNETIZATION; NANOPARTICLES; NANOSTRUCTURES; NICKEL IONS; SYNTHESIS; TEMPERATURE RANGE 0273-0400 K; TRANSMISSION ELECTRON MICROSCOPY; VACANCIES; X-RAY DIFFRACTION; X-RAY SPECTROSCOPY; ZINC OXIDES