Depoling and fatigue behavior of Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystal at megahertz frequencies under bipolar electric field

Zhaojiang Chen, Shiyang Li, Yang Zhang, Wenwu Cao

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Bipolar electric field induced degradation in [001]c poled Pb(Mg1/3Nb2/3)O3-0.29PbTiO3 (PMN-0.29PT) single crystals was investigated at megahertz frequencies. The electromechanical coupling factor kt, dielectric constant εr, dielectric loss D, and piezoelectric constant d33 were measured as a function of amplitude, frequency, and number of cycles of the applied electric field. Our results showed that samples degrade rapidly when the field amplitude is larger than a critical value due to the onset of domain switching. We define this critical value as the effective coercive field Ec at high frequencies, which increases drastically with frequency. We also demonstrate an effective counter-depoling method by using a dc bias, which could help the design of high field driven devices based on PMN-PT single crystals and operated at megahertz frequencies.

Original languageEnglish (US)
Article number174101
JournalJournal of Applied Physics
Volume121
Issue number17
DOIs
StatePublished - May 7 2017

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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