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Title: Atomic Resolution Probing of Phase Transformations and Domain Evolution During Large Superelastic Deformation in Ferroelectrics with in situ TEM

Abstract

Intrinsically brittle Ferroelectrics have attractive applications such as flexible/wearable electronic devices and mechanically-written high-density memory that depend on both functional and mechanical performance. One potential way to mitigate their brittle behavior is through large superelastic deformation stemming from strain-driven phase transformations and domain evolution. Therefore, in this work, we investigated free-standing single-crystal BaTiO3 and Pb(Mg1/3Nb2/3)O3-PbTiO3 sub-micrometer pillars during large superelastic deformation, directly observing the stress-induced phase transformations and domain evolution by using in situ Scanning Transmission Electron Microscope (STEM). We found ultra-small and multiple-phase coexistence with sizes down to a few unit cells, and we were able to study them at atomic resolution while under load. Notably, extremely small phase transformation structures and domain structures are often introduced during the large superelastic deformations since the stress field is not screened in ferroelectrics, as compared to the situation with electrical field or thermal cycling.

Authors:
 [1];  [2];  [3];  [3];  [3];  [3];  [3];  [4];  [4]
+ Show Author Affiliations
  1. Nanjing Univ. (China). Physics School and Modern Anaysis Center
  2. Austrian Academy of Sciences, Leoben (Austria). Erich Schmid Inst. of Materials Science
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry, National Center for Electron Microscopy
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry, National Center for Electron Microscopy; Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Engineering
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC); Natural Science Foundation of Jiangsu Province; National Science Foundation (NSF); US Department of the Navy, Office of Naval Research (ONR)
OSTI Identifier:
1602852
Grant/Contract Number:  
AC02-05CH11231; 50802039; BK20151382; N00014-12-1-0413; N00014-17-1-2283
Resource Type:
Accepted Manuscript
Journal Name:
Microscopy and Microanalysis
Additional Journal Information:
Journal Volume: 25; Journal Issue: S2; Conference: Microscopy and Microanalysis; Journal ID: ISSN 1431-9276
Publisher:
Microscopy Society of America (MSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Deng, Y., Gammer, C., Ciston, J., Ercius, Peter, Ophus, C., Bustillo, K. C., Song, Chengyu, Zhang, Ruopeng, and Minor, A. M. Atomic Resolution Probing of Phase Transformations and Domain Evolution During Large Superelastic Deformation in Ferroelectrics with in situ TEM. United States: N. p., 2019. Web. doi:10.1017/s143192761900998x.
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Deng, Y., Gammer, C., Ciston, J., Ercius, Peter, Ophus, C., Bustillo, K. C., Song, Chengyu, Zhang, Ruopeng, & Minor, A. M. Atomic Resolution Probing of Phase Transformations and Domain Evolution During Large Superelastic Deformation in Ferroelectrics with in situ TEM. United States. https://doi.org/10.1017/s143192761900998x
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Deng, Y., Gammer, C., Ciston, J., Ercius, Peter, Ophus, C., Bustillo, K. C., Song, Chengyu, Zhang, Ruopeng, and Minor, A. M. Mon . "Atomic Resolution Probing of Phase Transformations and Domain Evolution During Large Superelastic Deformation in Ferroelectrics with in situ TEM". United States. https://doi.org/10.1017/s143192761900998x. https://www.osti.gov/servlets/purl/1602852.
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@article{osti_1602852,
title = {Atomic Resolution Probing of Phase Transformations and Domain Evolution During Large Superelastic Deformation in Ferroelectrics with in situ TEM},
author = {Deng, Y. and Gammer, C. and Ciston, J. and Ercius, Peter and Ophus, C. and Bustillo, K. C. and Song, Chengyu and Zhang, Ruopeng and Minor, A. M.},
abstractNote = {Intrinsically brittle Ferroelectrics have attractive applications such as flexible/wearable electronic devices and mechanically-written high-density memory that depend on both functional and mechanical performance. One potential way to mitigate their brittle behavior is through large superelastic deformation stemming from strain-driven phase transformations and domain evolution. Therefore, in this work, we investigated free-standing single-crystal BaTiO3 and Pb(Mg1/3Nb2/3)O3-PbTiO3 sub-micrometer pillars during large superelastic deformation, directly observing the stress-induced phase transformations and domain evolution by using in situ Scanning Transmission Electron Microscope (STEM). We found ultra-small and multiple-phase coexistence with sizes down to a few unit cells, and we were able to study them at atomic resolution while under load. Notably, extremely small phase transformation structures and domain structures are often introduced during the large superelastic deformations since the stress field is not screened in ferroelectrics, as compared to the situation with electrical field or thermal cycling.},
doi = {10.1017/s143192761900998x},
journal = {Microscopy and Microanalysis},
number = S2,
volume = 25,
place = {United States},
year = {Mon Aug 05 00:00:00 EDT 2019},
month = {Mon Aug 05 00:00:00 EDT 2019}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1017/s143192761900998x
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Figures / Tables:

Figure 1 Figure 1: (a) The domain evolutions in a single-crystal BaTiO3 sub-micrometer pillar under compression loading. We use the models below to illustrate the domain evolutions in the pillar. (b) HRSTEM observation on a domain wall.
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Works referenced in this record:

Strain mapping at nanometer resolution using advanced nano-beam electron diffraction
journal, June 2015

  • Ozdol, V. B.; Gammer, C.; Jin, X. G.
  • Applied Physics Letters, Vol. 106, Issue 25
  • DOI: 10.1063/1.4922994

Observation of a periodic array of flux-closure quadrants in strained ferroelectric PbTiO3 films
journal, April 2015

Applications of Modern Ferroelectrics
journal, February 2007

Domain wall nanoelectronics
journal, February 2012

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