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Title: Microstructural and ionic transport studies of hydrothermally synthesized lanthanum fluoride nanoparticles

This article presents the structural and transport characteristics of hydrothermally synthesized LaF{sub 3} nanoparticles with an average crystallite size of 35nm. The phase formation of the material is confirmed by both X-ray diffraction and transmission electron microscopy techniques. In addition, phase purity of the LaF{sub 3} nanoparticles is corroborated by micro-Raman spectroscopy studies. The complex impedance plots at different temperatures reveal that the conductivity is predominantly due to the intrinsic bulk grains and the conductivity relaxation is non-Debye in nature. The frequency variation of conductivity exhibits dispersion at higher frequencies that can be explained with the frame work of Almond-West formalism. The conduction process is controlled by the mobility of the charge carriers and the charge of transport of mobile fluoride ions occur through hopping mechanism. The scaling behavior of both frequency dependence of conductivity and complex impedance plots at different temperatures confirm that the relaxation mechanism of the mobile fluoride ions is independent of temperature.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Department of Physics, Indian Institute of Technology Madras, Chennai, 600 036 (India)
  2. (Germany)
  3. Materials Science and Engineering Division, National Institute of Standards and Technology (NIST), Gaithersburg 20899 (United States)
  4. (United States)
  5. School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia Campus, Brisbane 4072 (Australia)
Publication Date:
OSTI Identifier:
22420216
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 4; Journal Issue: 12; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; CHARGE CARRIERS; DISPERSIONS; FREQUENCY DEPENDENCE; HYDROTHERMAL SYNTHESIS; IMPURITIES; IONS; LANTHANUM FLUORIDES; MICROSTRUCTURE; NANOPARTICLES; RAMAN SPECTROSCOPY; RELAXATION; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION