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Non-ergodicity and polar features of the transitional phase in lead zirconate

Abstract : The so-called "intermediate" phase in lead zirconate (PbZrO3) is shown to exhibit a peculiar dielectric signature, both as a function of time and of frequency, on the contrary to the low temperature antiferroelectric and high temperature paraelectric phases. This signature is present over a temperature range that overlaps with the paraelectric phase and depends on whether the sample is cooled or heated. In addition, the time dependence of the dielectric constant indicates that PbZrO3 evolves isothermally toward a state that is neither the one measured while heating nor while cooling. We ascribe the observed non-ergodicity to the establishment of a modulated phase stabilized by polar defects. (C) 2014 AIP Publishing LLC.
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https://hal-centralesupelec.archives-ouvertes.fr/hal-02186453
Contributor : Amandine Lustrement <>
Submitted on : Wednesday, July 17, 2019 - 12:21:39 PM
Last modification on : Wednesday, July 1, 2020 - 4:22:03 PM

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R. Faye, H. Liu, Jean-Michel Kiat, Brahim Dkhil, P.-E. Janolin. Non-ergodicity and polar features of the transitional phase in lead zirconate. Applied Physics Letters, American Institute of Physics, 2014, 105 (16), ⟨10.1063/1.4899139⟩. ⟨hal-02186453⟩

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