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Separation of dielectric and space charge polarizations in Ca Cu3 Ti4 O12 CaTi O3 composite polycrystalline systems

Applied Physics Letters, ISSN: 0003-6951, Vol: 90, Issue: 14
2007
  • 37
    Citations
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    Usage
  • 40
    Captures
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    37
    • Citation Indexes
      37
  • Captures
    40

Article Description

The complex analysis of dielectric/capacitance is a very useful approach to separate different polarization contributions existing in polycrystalline ceramics. In this letter, the authors use this type of spectroscopic analysis to separate the bulk's dielectric dipolar relaxation contributions from the polarization contribution due to space charge in the grain boundaries of a Ca Cu3 Ti4 O12 CaTi O3 polycrystalline composite system. The bulk dielectric dipolar relaxation was attributed to the self-intertwined domain structures from the Ca Cu3 Ti4 O12 phase coupled to the dipole relaxation from the CaTi O3 phase, while the space charge relaxation was attributed to the Schottky-type potential barrier responsible for the highly non-Ohmic properties observed in this composite polycrystalline system. © 2007 American Institute of Physics.

Bibliographic Details

Paulo R. Bueno; William C. Ribeiro; Miguel A. Ramírez; Josá A. Varela; Elson Longo

AIP Publishing

Physics and Astronomy

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