Size induced tuning of dielectric behavior in nanostructured Y0.95Ca0.05MnO3 compoundsReport as inadecuate

Size induced tuning of dielectric behavior in nanostructured Y0.95Ca0.05MnO3 compounds - Download this document for free, or read online. Document in PDF available to download.

Applied Nanoscience

, Volume 4, Issue 7, pp 889–895

First Online: 26 September 2013Received: 17 August 2013Accepted: 12 September 2013


Size is the key factor of nanostructured materials, since all the structural, transport, electrical, magnetic and other physical properties can be tuned by this factor of materials. Only the condition is to choose appropriate inexpensive scale-processing method for material synthesis which offers good control over the stoichiometry, morphology and particle size distribution. Present communication deals with the studies on the sol–gel grown Y0.95Ca0.05MnO3 YCMO nanostructured compounds for their size-induced tuning of dielectric behavior. Structural studies reveal the single phasic nature with improved crystallite size with sintering temperature. Dielectric constant real and imaginary is found to increase with temperature and crystallite size-sintering temperature. High dielectric loss has been observed in the present system. Size dependent activation energy Ea, obtained from modulus measurement, showing the increase in Ea with crystallite size. The variation in various dielectric parameters and Ea has been discussed in the light of crystallite size, crystallite boundaries, oxygen vacancies and charge carrier hopping.

KeywordsSize effect Dielectric behavior Sol–Gel Nanostructure  Download fulltext PDF

Author: N. A. Shah


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