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Title: Domain alignment within ferroelectric/dielectric PbTiO 3 /SrTiO 3 superlattice nanostructures

Abstract

The ferroelectric domain pattern within lithographically defined PbTiO 3/SrTiO 3 ferroelectric/dielectric heteroepitaxial superlattice nanostructures is strongly influenced by the edges of the structures. Synchrotron X-ray nanobeam diffraction reveals that the spontaneously formed 180° ferroelectric stripe domains exhibited by such superlattices adopt a configuration in rectangular nanostructures in which domain walls are aligned with long patterned edges. The angular distribution of X-ray diffuse scattering intensity from nanodomains indicates that domains are aligned within an angular range of approximately 20° with respect to the edges. Computational studies based on a time-dependent Landau–Ginzburg–Devonshire model show that the preferred direction of the alignment results from lowering of the bulk and electrostrictive contributions to the free energy of the system due to the release of the lateral mechanical constraint. This unexpected alignment appears to be intrinsic and not a result of distortions or defects caused by the patterning process. Thus, our work demonstrates how nanostructuring and patterning of heteroepitaxial superlattices allow for pathways to create and control ferroelectric structures that may appear counterintuitive.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1];  [3]; ORCiD logo [1];  [3];  [4]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [1]
  1. Univ. of Wisconsin-Madison, Madison, WI (United States). Dept. of Materials Science and Engineering
  2. Univ. of Connecticut, Storrs, CT (United States). Dept. of Physics
  3. Stony Brook Univ., NY (United States). Dept. of Physics and Astronomy
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
  5. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Northwestern Univ., Evanston, IL (United States). Center for Hierarchical Material Design, Northwestern-Argonne Inst. of Science and Engineering
  6. Univ. of Connecticut, Storrs, CT (United States). Dept. of Physics and Dept. of Materials Science and Engineering and Inst. of Material Science
Publication Date:
Research Org.:
Univ. of Wisconsin-Madison, Madison, WI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS) (SC-27); Oak Ridge Inst. for Science and Education (ORISE), Oak Ridge, TN (United States); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Connecticut, Storrs, CT (United States); National Science Foundation (NSF)
OSTI Identifier:
1423429
Grant/Contract Number:
FG02-04ER46147; AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nanoscale
Additional Journal Information:
Journal Volume: 10; Journal Issue: 7; Journal ID: ISSN 2040-3364
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ferroelectric nanomaterials; x-ray nanobeam diffraction; nanoscale effects in complex oxides; organization and alignment of nanoscale order parameters

Citation Formats

Park, Joonkyu, Mangeri, John, Zhang, Qingteng, Yusuf, M. Humed, Pateras, Anastasios, Dawber, Matthew, Holt, Martin V., Heinonen, Olle G., Nakhmanson, Serge, and Evans, Paul G. Domain alignment within ferroelectric/dielectric PbTiO 3 /SrTiO 3 superlattice nanostructures. United States: N. p., 2018. Web. doi:10.1039/C7NR07203A.
Park, Joonkyu, Mangeri, John, Zhang, Qingteng, Yusuf, M. Humed, Pateras, Anastasios, Dawber, Matthew, Holt, Martin V., Heinonen, Olle G., Nakhmanson, Serge, & Evans, Paul G. Domain alignment within ferroelectric/dielectric PbTiO 3 /SrTiO 3 superlattice nanostructures. United States. doi:10.1039/C7NR07203A.
Park, Joonkyu, Mangeri, John, Zhang, Qingteng, Yusuf, M. Humed, Pateras, Anastasios, Dawber, Matthew, Holt, Martin V., Heinonen, Olle G., Nakhmanson, Serge, and Evans, Paul G. Mon . "Domain alignment within ferroelectric/dielectric PbTiO 3 /SrTiO 3 superlattice nanostructures". United States. doi:10.1039/C7NR07203A.
@article{osti_1423429,
title = {Domain alignment within ferroelectric/dielectric PbTiO 3 /SrTiO 3 superlattice nanostructures},
author = {Park, Joonkyu and Mangeri, John and Zhang, Qingteng and Yusuf, M. Humed and Pateras, Anastasios and Dawber, Matthew and Holt, Martin V. and Heinonen, Olle G. and Nakhmanson, Serge and Evans, Paul G.},
abstractNote = {The ferroelectric domain pattern within lithographically defined PbTiO3/SrTiO3 ferroelectric/dielectric heteroepitaxial superlattice nanostructures is strongly influenced by the edges of the structures. Synchrotron X-ray nanobeam diffraction reveals that the spontaneously formed 180° ferroelectric stripe domains exhibited by such superlattices adopt a configuration in rectangular nanostructures in which domain walls are aligned with long patterned edges. The angular distribution of X-ray diffuse scattering intensity from nanodomains indicates that domains are aligned within an angular range of approximately 20° with respect to the edges. Computational studies based on a time-dependent Landau–Ginzburg–Devonshire model show that the preferred direction of the alignment results from lowering of the bulk and electrostrictive contributions to the free energy of the system due to the release of the lateral mechanical constraint. This unexpected alignment appears to be intrinsic and not a result of distortions or defects caused by the patterning process. Thus, our work demonstrates how nanostructuring and patterning of heteroepitaxial superlattices allow for pathways to create and control ferroelectric structures that may appear counterintuitive.},
doi = {10.1039/C7NR07203A},
journal = {Nanoscale},
number = 7,
volume = 10,
place = {United States},
year = {Mon Jan 22 00:00:00 EST 2018},
month = {Mon Jan 22 00:00:00 EST 2018}
}

Journal Article:
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