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Designing Morphotropic Phase Composition in BiFeO3

Journal Article · · Nano Letters
 [1];  [2];  [3];  [3];  [3];  [4];  [3];  [5];  [6];  [6];  [6];  [6];  [7];  [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)
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.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1505299
Journal Information:
Nano Letters, Journal Name: Nano Letters Journal Issue: 2 Vol. 19; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Reconfigurable lateral anionic heterostructures in oxide thin films via lithographically defined topochemistry journal July 2019
Optical response of BiFe O 3 films subjected to uniaxial strain journal September 2019

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