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Title: Structural, optical and dielectric properties of Ce{sup 3+}, Pr{sup 3+}, Nd{sup 3+} doped LaF{sub 3} hexagonal nanoparticles

Well dispersed, elongated and hexagonal LaF{sub 3}: Ce{sup 3+}, Pr{sup 3+}, Nd{sup 3+} nanocrystals have been synthesized by microwave assisted technique. X-ray diffraction (XRD) studies indicates the formation of nanocrystals with unit cell parameters a = b = 7.144 A{sup 0}, c = 7.281 A{sup 0}, (c/a = 1.019) and unit cell volume of 321.86 (A{sup 0}){sup 3} of average crystallite size 21 nm have been traced by from XRD analysis and it is close agreement with transmission electron microscope (TEM) analysis. Ultra-violet (UV) absorption spectrum shows an edge at 250 nm indicating presence of wide transparency window region between 200 nm-800 nm. Fundamental groups have been observed in the Fourier transformation infrared (FTIR) and FT-Raman spectra. The blue luminescent properties of the nanoparticles were investigated by excitation and emission spectra. Room temperature Electrical and dielectric properties were studied for the synthesized nanocrystals the values of conductivity & resistivity is found to be in the order of 10{sup −6} Scm{sup −1} and resistivity 10{sup 5} Ω cm. Low dielectric constant value was observed in the LaF{sub 3}: Ce{sup 3+}, Pr{sup 3+}, and Nd{sup 3+} nanocrystals at high frequency indicating its suitability for electro optics applications.
Authors:
 [1] ;  [2]
  1. Department of Physics, Bhavan’s College of ASC, Andheri (w) Mumbai-400058, Maharashtra (India)
  2. Material Research Lab, Department of Physics, Birla College, Kalyan-421304, Maharashtra (India)
Publication Date:
OSTI Identifier:
22490219
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1665; Journal Issue: 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION SPECTRA; CERIUM IONS; DOPED MATERIALS; EMISSION SPECTRA; EXCITATION; FOURIER TRANSFORMATION; INFRARED SPECTRA; LANTHANUM FLUORIDES; LUMINESCENCE; MICROWAVE RADIATION; NANOPARTICLES; NANOSTRUCTURES; NEODYMIUM IONS; OPACITY; PERMITTIVITY; PRASEODYMIUM IONS; RAMAN SPECTRA; TEMPERATURE RANGE 0273-0400 K; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION