Mechanical-force-induced non-local collective ferroelastic switching in epitaxial lead-titanate thin films

Lu, Xiaoyan; Chen, Zuhuang; Cao, Ye; Tang, Yunlong; Xu, Ruijuan; Saremi, Sahar; Zhang, Zhan; You, Lu; Dong, Yongqi; Das, Sujit; Zhang, Hangbo; Zheng, Limei; Wu, Huaping; Lv, Weiming; Xie, Guoqiang; Liu, Xingjun; Li, Jiangyu; Chen, Lang; Chen, Long-Qing; Cao, Wenwu; Martin, Lane W.

doi:10.1038/s41467-019-11825-2

Title: Mechanical-force-induced non-local collective ferroelastic switching in epitaxial lead-titanate thin films

Journal Article · 02 September 2019 · Nature Communications

DOI: https://doi.org/10.1038/s41467-019-11825-2 · OSTI ID:1580922

^[1]; Chen, Zuhuang ^[1]; Cao, Ye ^[2]; Tang, Yunlong ^[3]; Xu, Ruijuan ^[3];

^[3]; Zhang, Zhan ^[4];

^[5]; Dong, Yongqi ^[4]; Das, Sujit ^[3]; Zhang, Hangbo ^[1]; Zheng, Limei ^[6]; Wu, Huaping ^[7]; Lv, Weiming ^[6]; Xie, Guoqiang ^[1]; Liu, Xingjun ^[1]; Li, Jiangyu ^[8];

^[9]; Chen, Long-Qing ^[10];

^[11] more »

Harbin Inst. of Technology (China)
Univ. of Texas, Arlington, TX (United States)
Univ. of California, Berkeley, CA (United States)
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Nanyang Technological Univ. (Singapore)
Harbin Inst. of Technology (China). Condensed Matter Science and Technology Inst.
Zhejiang Univ. of Technology, Hangzhou (China)
Univ. of Washington, Seattle, WA (United States)
Southern Univ. of Science and Technology, Shenzhen (China)
Pennsylvania State Univ., University Park, PA (United States). Dept. of Physics
Harbin Inst. of Technology (China). Condensed Matter Science and Technology Inst.; Pennsylvania State Univ., University Park, PA (United States)
Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Ferroelastic switching in ferroelectric/multiferroic oxides plays a crucial role in determining their dielectric, piezoelectric, and magnetoelectric properties. In thin films of these materials, however, substrate clamping is generally thought to limit the electric-field- or mechanical-force-driven responses to the local scale. Here, we report mechanical-force-induced large-area, non-local, collective ferroelastic domain switching in PbTiO₃ epitaxial thin films by tuning the misfit-strain to be near a phase boundary wherein c/a and a₁/a₂ nanodomains coexist. Phenomenological models suggest that the collective, c-a-c-a ferroelastic switching arises from the small potential barrier between the degenerate domain structures, and the large anisotropy of a and c domains, which collectively generates much larger response and large-area domain propagation. Large-area, non-local response under small stimuli, unlike traditional local response to external field, provides an opportunity of unique response to local stimuli, which has potential for use in high-sensitivity pressure sensors and switches.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Natural Science Foundation of China; Army Research Office; National Science Foundation (NSF); Gordon and Betty Moore Foundation’s EPiQS Initiative

Grant/Contract Number:: AC02-05CH11231; SC0012375

OSTI ID:: 1580922

Journal Information:: Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 10; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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