Non-equilibrium strain relaxation noise in the relaxor ferroelectric (PbMg1/3Nb2/3O3)1-x(PbTiO3)x

Xinyang Zhang, Thomas J. Kennedy, Eugene V. Colla, M. B. Weissman, D. D. Viehland

Research output: Contribution to journalArticlepeer-review


Large low-frequency polarization noise is found in some perovskite relaxor ferroelectrics when they are partially polarized, regardless of whether the polarization is accompanied by an applied electric field. The noise appears both in the ferroelectric and relaxor states, including the nominally ergodic paraelectric state at temperatures above the susceptibility peak. Since it is present whenever the samples have non-zero average piezoelectric coefficients, but not otherwise evident, it appears to be a response to mechanical strain changes. Dependence of the noise on sample thermal history indicates that non-equilibrium strain relaxation is the source, even in the temperature range for which the sample is nominally ergodic. Non-equilibrium noise in the absence of net piezoelectricity is found at somewhat higher frequencies. Related materials lacking a metastable non-equilibrium cubic bulk phase and a symmetry-broken surface layer show very little of the anomalous low-frequency noise. The implications for a non-equilibrium origin of the skin effect are discussed.

Original languageEnglish (US)
Article number234102
JournalJournal of Applied Physics
Issue number23
StatePublished - Dec 21 2018
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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