Dielectric relaxation in Bi2O3-ZnO-Nb2O5 cubic pyrochlore

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Frequency dispersion associated with dielectric relaxation phenomena in polycrystalline cubic pyrochlore with normal composition (Bi1.5Zn0.5)(Zn0.5Nb1.5)O 7 is analyzed. Measurements at cryogenic temperatures and high frequencies reveal a broad distribution of relaxation times. The associated dielectric loss data can be modeled with a function convoluting the Vogel-Fulcher law and a Gaussian distribution. This function, dependent only on measuring frequency and temperature, describes exceptionally well the phenomena observed over a frequency range covering seven decades and over 300 K.

Original languageEnglish (US)
Pages (from-to)4512-4516
Number of pages5
JournalJournal of Applied Physics
Issue number8
StatePublished - Apr 15 2001

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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