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Bulletin of Materials Science

, Volume 36, Issue 4, pp 591–599 | Cite as

Impedance and a.c. conductivity studies of Ba(Pr1/2Nb1/2)O3 ceramic

  • K AMAR NATH
  • K PRASADEmail author
  • K P CHANDRA
  • A R KULKARNI
Article

Abstract

Impedance and electrical conduction studies of Ba(Pr1/2Nb1/2)O3 ceramic prepared through conventional ceramic fabrication technique are presented. The crystal symmetry, space group and unit cell dimensions were estimated using Rietveld analysis. X-ray diffraction analysis indicated the formation of a single-phase cubic structure with space group, \({Pm\overline 3 m}\). EDAX and SEM studies were carried out to study the quality and purity of compound. To find a correlation between the response of the real system and idealized model circuit composed of discrete electrical components, the model fittings were presented using impedance data. Complex impedance as well as electric modulus analyses suggested dielectric relaxation to be of non-Debye type and negative temperature coefficient of resistance character. The correlated barrier hopping model was employed to successfully explain the mechanism of charge transport in Ba(Pr1/2Nb1/2)O3. The a.c. conductivity data were used to evaluate density of states at Fermi level, minimum hopping length and apparent activation energy.

Keywords

Ba(Pr1/2Nb1/2)O3 perovskite structure impedance spectroscopy permittivity electrical conductivity 

Notes

Acknowledgement

The present work was supported by the Defence Research and Development Organization, New Delhi.

References

  1. Bhagat S and Prasad K 2010 Phys. Status Solidi A207 1232Google Scholar
  2. Boukamp B A 2004 Solid State Ionics 169 65CrossRefGoogle Scholar
  3. Brixner L H 1960 J. Inorg. Nucl. Chem. 15 352CrossRefGoogle Scholar
  4. Cao W and Gerhardt R 1990 Solid State Ionics 42 213CrossRefGoogle Scholar
  5. Dias A, Khalam L A, Sebastian M T, Paschoal C W A and Moreira R L 2006 Chem. Mater. 18 214CrossRefGoogle Scholar
  6. Gerhardt R 1994 J. Phys. Chem. Solids 55 1491CrossRefGoogle Scholar
  7. Kao K C 2004 Dielectric phenomena in solids (USA: Elsevier Academic Press)Google Scholar
  8. Khalam L A, Sreemoolanathan H, Ratheesh R, Mohanan P and Sebastian M T 2004 Mater. Sci. Eng. B107 264CrossRefGoogle Scholar
  9. Lily, Kumari K, Prasad K and Yadav K L 2007 J. Mater. Sci. 42 6252CrossRefGoogle Scholar
  10. Maier R, Chon J L, Neumeier J J and Bendersky L A 2001 Appl. Phys. Lett. 78 2536CrossRefGoogle Scholar
  11. Moulson A J and Herbert J M 2003 Electroceramics (England: John Wiley & Sons Ltd.) 2nd ed.CrossRefGoogle Scholar
  12. Nadeem M, Akhtar M J, Khan A Y, Shaheen R and Haque M N 2002 Chem. Phys. Lett. 366 433CrossRefGoogle Scholar
  13. Nobre M A L and Lanfredi S 2003 J. Phys. Chem. Solids 64 2457CrossRefGoogle Scholar
  14. Prasad K, Kumari K, Lily, Chandra K P, Yadav K L and Sen S 2007 Adv. Appl. Ceram. 106 241CrossRefGoogle Scholar
  15. Prasad K, Bhagat S, Amar Nath K, Choudhary S N and Yadav K L 2009 Phys. Status Solidi A206 316Google Scholar
  16. Prasad K, Chandra K P, Bhagat S, Choudhary S N and Kulkarni A R 2010a J. Am. Ceram. Soc. 93 190CrossRefGoogle Scholar
  17. Prasad K, Amar Nath K, Bhagat S, Priyanka, Chandra K P and Kulkarni A R 2010b Adv. Appl. Ceram. 109 225CrossRefGoogle Scholar
  18. Prasad K, Bhagat S, Priyanka, Amar Nath K, Chandra K P and Kulkarni A R 2010c Physica B: Condens. Matter 405 3564CrossRefGoogle Scholar
  19. Rodriguez-Carvajal J 2008 FullProf 2000: A Rietveld refinement and pattern matching analysis program (France: Laboratoire Léon Brillouin (CEA-CNRS))Google Scholar
  20. Roisnel J and Rodrıguez-Carvajal J 2000 WinPLOTR; Centre d’Etudes de Saclay (Gif sur Yvette Cedex, France: Laboratoire Leon Brillouin (CEA-CNRS))Google Scholar
  21. Sharma G D, Roy M and Roy M S 2003 Mater. Sci. Eng. B104 15CrossRefGoogle Scholar
  22. Sreemoolanathan H, Ratheesh R, Sebastian M T and Mohanan P 1997 Mater. Lett. 33 161CrossRefGoogle Scholar
  23. Zurmiihlen R, Petzelt J, Kamba S, Voitsekhovskiia V V, Colla E and Setter N 1995a J. Appl. Phys. 77 5341CrossRefGoogle Scholar
  24. Zurmiihlen R, Petzelt J, Kamba S, Kozlov G, Volkov A, Gorshunov B, Dube D, Tagantsev A and Setter N 1995b J. Appl. Phys. 77 5351CrossRefGoogle Scholar

Copyright information

© Indian Academy of Sciences 2013

Authors and Affiliations

  • K AMAR NATH
    • 1
  • K PRASAD
    • 2
    Email author
  • K P CHANDRA
    • 3
  • A R KULKARNI
    • 4
  1. 1.University Department of PhysicsT.M. Bhagalpur UniversityBhagalpurIndia
  2. 2.Centre for Applied PhysicsCentral University of JharkhandRanchiIndia
  3. 3.Department of PhysicsS.M. CollegeBhagalpurIndia
  4. 4.Department of Metallurgical Engineering and Materials ScienceIndian Institute of TechnologyMumbaiIndia

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