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Title: Designing Morphotropic Phase Composition in BiFeO 3

Abstract

In classical morphotropic piezoelectric materials, rhombohedral and tetragonal phase variants can energetically compete to form a mixed phase regime with improved functional properties. Even though the discovery of morphotropic-like phases in multiferroic BiFeO 3 films has broadened this definition, accessing these phase spaces is still typically accomplished through isovalent substitution or heteroepitaxial strain which do not allow for continuous modification of phase composition postsynthesis. In this work, we show that it is possible to use low-energy helium implantation to tailor morphotropic phases of epitaxial BiFeO 3 films postsynthesis in a continuous and iterative manner. Applying this strain doping approach to morphotropic films creates a new phase space based on internal and external lattice stress that can be seen as an analogue to temperature–composition phase diagrams of classical morphotropic ferroelectric systems.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3]; ORCiD logo [3]; ORCiD logo [3];  [4];  [3]; ORCiD logo [5];  [6];  [6];  [6];  [6];  [7]; ORCiD logo [3]
  1. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Martin Luther Univ. of Halle-Wittenberg, Halle (Germany)
  2. National Inst. for Research and Development in Electrochemistry and Condensed Matter, Timisoara (Romania)
  3. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
  4. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Drexel Univ., Philadelphia, PA (United States)
  5. Martin Luther Univ. of Halle-Wittenberg, Halle (Germany)
  6. Iowa State Univ., Ames, IA (United States)
  7. Harvard Univ., Cambridge, MA (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1505299
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 19; Journal Issue: 2; Journal ID: ISSN 1530-6984
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ferroelectrics; implantation; metastability; Morphotropic phases; strain

Citation Formats

Herklotz, Andreas, Rus, Stefania F., Balke, Nina, Rouleau, Christopher, Guo, Er-Jia, Huon, Amanda, KC, Santosh, Roth, Robert, Yang, Xu, Vaswani, Chirag, Wang, Jigang, Orth, Peter P., Scheurer, Mathias S., and Ward, Thomas Z. Designing Morphotropic Phase Composition in BiFeO3. United States: N. p., 2019. Web. doi:10.1021/acs.nanolett.8b04322.
Herklotz, Andreas, Rus, Stefania F., Balke, Nina, Rouleau, Christopher, Guo, Er-Jia, Huon, Amanda, KC, Santosh, Roth, Robert, Yang, Xu, Vaswani, Chirag, Wang, Jigang, Orth, Peter P., Scheurer, Mathias S., & Ward, Thomas Z. Designing Morphotropic Phase Composition in BiFeO3. United States. doi:10.1021/acs.nanolett.8b04322.
Herklotz, Andreas, Rus, Stefania F., Balke, Nina, Rouleau, Christopher, Guo, Er-Jia, Huon, Amanda, KC, Santosh, Roth, Robert, Yang, Xu, Vaswani, Chirag, Wang, Jigang, Orth, Peter P., Scheurer, Mathias S., and Ward, Thomas Z. Wed . "Designing Morphotropic Phase Composition in BiFeO3". United States. doi:10.1021/acs.nanolett.8b04322.
@article{osti_1505299,
title = {Designing Morphotropic Phase Composition in BiFeO3},
author = {Herklotz, Andreas and Rus, Stefania F. and Balke, Nina and Rouleau, Christopher and Guo, Er-Jia and Huon, Amanda and KC, Santosh and Roth, Robert and Yang, Xu and Vaswani, Chirag and Wang, Jigang and Orth, Peter P. and Scheurer, Mathias S. and Ward, Thomas Z.},
abstractNote = {In classical morphotropic piezoelectric materials, rhombohedral and tetragonal phase variants can energetically compete to form a mixed phase regime with improved functional properties. Even though the discovery of morphotropic-like phases in multiferroic BiFeO3 films has broadened this definition, accessing these phase spaces is still typically accomplished through isovalent substitution or heteroepitaxial strain which do not allow for continuous modification of phase composition postsynthesis. In this work, we show that it is possible to use low-energy helium implantation to tailor morphotropic phases of epitaxial BiFeO3 films postsynthesis in a continuous and iterative manner. Applying this strain doping approach to morphotropic films creates a new phase space based on internal and external lattice stress that can be seen as an analogue to temperature–composition phase diagrams of classical morphotropic ferroelectric systems.},
doi = {10.1021/acs.nanolett.8b04322},
journal = {Nano Letters},
number = 2,
volume = 19,
place = {United States},
year = {2019},
month = {2}
}

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This content will become publicly available on February 13, 2020
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