Ferroelastic domain motion by pulsed electric field in (111)/(11 1) rhombohedral epitaxial Pb(Z r0.65 T i0.35) O3 thin films: Fast switching and relaxation FERROELASTIC DOMAIN MOTION by PULSED ... YOSHITAKA EHARA et al.

Yoshitaka Ehara, Takao Shimizu, Shintaro Yasui, Takahiro Oikawa, Takahisa Shiraishi, Hiroki Tanaka, Noriyuki Kanenko, Ronald Maran, Tomoaki Yamada, Yasuhiko Imai, Osami Sakata, Nagarajan Valanoor, Hiroshi Funakubo

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Reversible electric-field induced domain switching in ferroelectric thin films gives rise to a large electromechanical coupling. Despite extensive in situ studies confirming a dominant contribution from domain switching, the speed of the domain wall motion had not been discussed enough. In this study, we performed time-resolved measurement of lattice elongation and non-180° domain switching for an epitaxial rhombohedral (111)/(111)-oriented (Pb(Zr0.65Ti0.35)O3 film under nanosecond electric field pulses by means of synchrotron x-ray diffraction. Both lattice elongation and non-180° domain switching due to a 200-ns electric pulse were directly observed from the shift of the 222 diffraction position toward a lower angle and the change in the integrated intensity ratio of 222 to 222 peaks, respectively. The non-180° domain switching also results in an increase of the switchable polarization. Following the removal of the electric field, it is seen that the non-180° domain back switching from 222 to 222 is sluggish compared to the relaxation of the field-induced lattice strain. This is different from the (100)/(001)-oriented tetragonal epitaxial Pb(Zr,Ti)O3 films, in which no obvious delay was detected. These results show the importance of the direct time-resolved response observation of the crystal structure change with the application of a high-speed electric pulse field to understand the frequency dispersion of the ferroelectric and piezoelectric responses of Pb(Zr,Ti)O3 films.

Original languageEnglish
Article number104116
JournalPhysical Review B
Volume100
Issue number10
DOIs
Publication statusPublished - 2019 Sep 30

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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