Geodesic
Synthesis and studies room temperature conductivity, dielectric analysis of LaF$_{3}$ nanocrystals
Nanosistemy: fizika, himiâ, matematika, Tome 5 (2014) no. 6, pp. 843-848 Cet article a éte moissonné depuis la source Math-Net.Ru

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Lanthanum fluoride (LaF$_{3}$) was synthesized using LaCl$_{3}$ and NH$_{4}$F as starting materials in deionized water as solvent via a microwavea-ssisted technique. The structure of LaF$_{3}$ nanocrystals, analyzed by XRD and TEM, was found to be hexagonal with an average crystalline particle size of 20 nm (JCPDS standard card (32-0483) of pure hexagonal LaF$_{3}$ crystals). The resistivity and conductivity at room temperature for LaF$_{3}$ was verified and found to depend on the applied DC field. At an applied voltage of 20 V/cm – 30 V/cm, the resistivity and conductivity changes rapidly due to the liberation of extra fluoride (F$^-$) ions, whereas the conductivity of LaF$_3$ nanocrystals depends upon temperature. The variation of dielectric constant ($\varepsilon$') and dielectric loss ($\varepsilon$") with applied frequency shows normal dielectric behavior, attributable to the space charge formation. The observed peak in the plot of tangent loss (tan $\delta$) vs. $\log F$ around 2.6 KHz can be attributed to interface charge relaxation at the grain boundaries.
Keywords: microwave radiation, dielectric materials.
Mots-clés : hexagonal shape, X-ray diffraction 
@article{NANO_2014_5_6_a11,
     author = {Sidheshwar G. Gaurkhede},
     title = {Synthesis and studies room temperature conductivity, dielectric analysis of {LaF}$_{3}$ nanocrystals},
     journal = {Nanosistemy: fizika, himi\^a, matematika},
     pages = {843--848},
     year = {2014},
     volume = {5},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/NANO_2014_5_6_a11/}
}
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Sidheshwar G. Gaurkhede. Synthesis and studies room temperature conductivity, dielectric analysis of LaF$_{3}$ nanocrystals. Nanosistemy: fizika, himiâ, matematika, Tome 5 (2014) no. 6, pp. 843-848. http://geodesic.mathdoc.fr/item/NANO_2014_5_6_a11/