Electric-Field-Driven Nanosecond Ferroelastic-Domain Switching Dynamics in Epitaxial Pb (Zr,Ti) O3 Film

Hyeon Jun Lee, Takao Shimizu, Hiroshi Funakubo, Yasuhiko Imai, Osami Sakata, Seung Hyun Hwang, Tae Yeon Kim, Changjae Yoon, Cheng Dai, Long Q. Chen, Su Yong Lee, Ji Young Jo

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Epitaxial oxide ferroelectric films exhibit emerging phenomena arising from complex domain configurations even at pseudoequilibrium, including the creation of domain states unfavored in nature and abrupt piezoelectric coefficients around morphotropic phase boundaries. The nanometer-sized domain configurations and their domain switching dynamics under external stimuli are directly linked to the ultrafast manipulation of ferroelectric thin films; however, complex domain switching dynamics under homogeneous electric fields has not been fully explored, especially at the nanosecond timescale. This Letter reports the nanosecond dynamics of ferroelastic-domain switching from the 90° to 180° direction using time-resolved X-ray microdiffraction under homogeneous electric fields onto an epitaxial Pb(Zr0.35,Ti0.65)O3 film capacitor. It is found that the application of electric fields induces spatially heterogeneous domain switching processes via intermediate domain structures with rotated polarization vectors. In addition, the domain switching time is shown to be inversely proportional to the magnitude of the applied electric field, and electric fields higher than 480 kV/cm are found to complete the ferroelastic switching within nanoseconds.

Original languageEnglish (US)
Article number217601
JournalPhysical review letters
Volume123
Issue number21
DOIs
StatePublished - Nov 18 2019

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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