Dielectric behavior of Fe-ion-doped BaTiO3 nanoparticles

Jana, A. ; Kundu, T. K. ; Pradhan, S. K. ; Chakravorty, D. (2005) Dielectric behavior of Fe-ion-doped BaTiO3 nanoparticles Journal of Applied Physics, 97 (4). 044311_1-044311_6. ISSN 0021-8979

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Official URL: http://jap.aip.org/resource/1/japiau/v97/i4/p04431...

Related URL: http://dx.doi.org/10.1063/1.1846135


Iron-ion-doped barium titanate (BaTiO3) nanoparticles have been synthesized through a chemical route using polyvinyl alcohol. The polymer serves as a surfactant to encapsulate the cationic species in divided groups during the reaction that confines the size and morphology of the specimen. The concentration of Fe3+ varies from 0 to 2 mol % in the specimens. The results from x-ray diffractograms and transmission electron micrographs show that the particle diameters in the specimen lie in the range 29 to 49 nm. It is seen that the ferroelectric-paraelectric phase transition temperature (Tc) varies with the composition and the dielectric permittivity in doped specimens is enhanced by an order of magnitude compared to undoped barium titanate ceramics. The dielectric permittivity shows maxima in the specimen containing 0.3 mol % of dopant concentration. The dielectric behavior of the specimens is explained in terms of the change in crystalline structure of the specimens.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
Keywords:Barium Compounds; Iron; Polymers; Surfactants; Ferroelectric Materials; Nanoparticles; Nanotechnology; Permittivity; Ferroelectric Transitions; Dielectric Losses; Ferroelectric Curie Temperature; Impurity Distribution; Grain Size; Doping Profiles; Transmission Electron Microscopy; X-ray Diffraction
ID Code:65054
Deposited On:15 Oct 2011 12:18
Last Modified:15 Oct 2011 12:18

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