Title of article
Structural and transport properties of double perovskite Dy2NiMnO6
Author/Authors
Chanda، نويسنده , , Sadhan and Saha، نويسنده , , Sujoy and Dutta، نويسنده , , Alo and Sinha، نويسنده , , T.P.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2015
Pages
8
From page
153
To page
160
Abstract
The double perovskite oxide Dy2NiMnO6 (DNMO) is synthesized in nano and bulk phase by the sol–gel citrate method. The Rietveld refinement of X-ray diffraction pattern of the sample at room temperature shows the monoclinic P21/n phase. Dielectric relaxation of the sample is investigated in the impedance and electric modulus formalisms in the frequency range from 50 Hz to 1 MHz and in the temperature range from 253 to 415 K. The Cole–Cole model is used to explain the relaxation mechanism in DNMO. The frequency-dependent maxima in the imaginary part of impedance are found to obey an Arrhenius law with activation energy of 0.346 and 0.344 eV for nano and bulk DNMO, respectively. A significant increase in conductivity of bulk DNMO has been observed than that of the nanoceramic. Electronic structures and magnetic properties of DNMO have been studied by performing first principles calculation based on density functional theory.
Keywords
E. Electronic structure , A. Ceramics , B. Sol–gel chemistry , C. Impedance spectroscopy , D. Dielectric properties
Journal title
Materials Research Bulletin
Serial Year
2015
Journal title
Materials Research Bulletin
Record number
2106044
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