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Structure and electrical properties of double perovskite Sr(Ni1/2Mo1/2)O3 ceramics

J. Appl. Phys. 106, 094105 (2009); doi:10.1063/1.3212978

Published 4 November 2009

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Anurak Prasatkhetragarn,1 Piyachon Ketsuwan,1 Santi Maensiri,2 Rattikorn Yimnirun,3 Chien-Chih Huang,4 and David P. Cann4
1School of Science and Technology, Naresuan Phayao University, Phayao 56000, Thailand
2Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand
3School of Physics, Institute of Science, Suranaree University of Technology, Nakorn Ratchasima 30000, Thailand
4Materials Science, School of Mechanical, Industrial and Manufacturing Engineering, Oregon State University, Corvallis, Oregon 97331, USA
The double perovskite Sr(Ni1/2Mo1/2)O3 has been prepared with solid-state reaction and was characterized by x-ray diffraction technique. It has been indicated that the single phase is formed at 1300  °C in air. The compound undergoes a phase transition at 280  °C, where the structure of the ordered perovskite type changes from tetragonal (I4/m) to cubic (Fm[overline 3]m). Dielectric constant (epsilonr) and dielectric loss (tan  delta) are observed at the transition point. The conductivity of the sample has been studied, and the slope of dc conductivity versus the inverse of temperature corresponds to an Arrhenius activation energy in the range of 0.34–0.46  eV. This range of activation is nearly double ionized oxygen vacancies V<sub>O</sub><sup>[bold [center-dot] ][bold [center-dot] ]</sup> in the resistivity transition of other perovskite oxides. ©2009 American Institute of Physics
History: Received 18 April 2009; accepted 1 August 2009; published 4 November 2009
Permalink: http://link.aip.org/link/?JAPIAU/106/094105/1
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KEYWORDS and PACS

Keywords
PACS
  • 81.05.Je
    Ceramics and refractories: fabrication, treatment, testing and analysis
  • 77.22.Ch
    Permittivity (dielectric function)
  • 77.22.Gm
    Dielectric loss and relaxation
  • 81.30.Hd
    Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder
  • 64.70.K-
    Solid-solid transitions
  • 61.72.jd
    Vacancies (point defects)
  • 72.80.Sk
    Electrical conductivity of insulators
  • 81.20.-n
    Methods of materials synthesis and materials processing
  • YEAR: 2009

PUBLICATION DATA

ISSN:
0021-8979 (print)   1089-7550 (online)
Publisher:
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REFERENCES (18)
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