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Stabilization of Polar Nanoregions in Pb-free Ferroelectrics

Pramanick, A. ; Dmowski, W. ; Egami, T. ; Budisuharto, A. Setiadi ; Weyland, F. ; Novak, N. ; Christianson, A. D. ; Borreguero, J. M. ; Abernathy, D. L. and Jørgensen, M. R.V. LU orcid (2018) In Physical Review Letters 120(20).
Abstract

The formation of polar nanoregions through solid-solution additions is known to enhance significantly the functional properties of ferroelectric materials. Despite considerable progress in characterizing the microscopic behavior of polar nanoregions (PNR), understanding their real-space atomic structure and dynamics of their formation remains a considerable challenge. Here, using the method of dynamic pair distribution function, we provide direct insights into the role of solid-solution additions towards the stabilization of polar nanoregions in the Pb-free ferroelectric of Ba(Zr,Ti)O3. It is shown that for an optimum level of substitution of Ti by larger Zr ions, the dynamics of atomic displacements for ferroelectric polarization are... (More)

The formation of polar nanoregions through solid-solution additions is known to enhance significantly the functional properties of ferroelectric materials. Despite considerable progress in characterizing the microscopic behavior of polar nanoregions (PNR), understanding their real-space atomic structure and dynamics of their formation remains a considerable challenge. Here, using the method of dynamic pair distribution function, we provide direct insights into the role of solid-solution additions towards the stabilization of polar nanoregions in the Pb-free ferroelectric of Ba(Zr,Ti)O3. It is shown that for an optimum level of substitution of Ti by larger Zr ions, the dynamics of atomic displacements for ferroelectric polarization are slowed sufficiently below THz frequencies, which leads to increased local correlation among dipoles within PNRs. The dynamic pair distribution function technique demonstrates a unique capability to obtain insights into locally correlated atomic dynamics in disordered materials, including new Pb-free ferroelectrics, which is necessary to understand and control their functional properties.

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author
; ; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
120
issue
20
article number
207603
publisher
American Physical Society
external identifiers
  • pmid:29864364
  • scopus:85047190013
ISSN
0031-9007
DOI
10.1103/PhysRevLett.120.207603
language
English
LU publication?
yes
id
740fb66f-0ce2-4d3d-8301-70e2158799c9
date added to LUP
2018-06-01 13:25:15
date last changed
2021-10-06 05:37:04
@article{740fb66f-0ce2-4d3d-8301-70e2158799c9,
  abstract     = {<p>The formation of polar nanoregions through solid-solution additions is known to enhance significantly the functional properties of ferroelectric materials. Despite considerable progress in characterizing the microscopic behavior of polar nanoregions (PNR), understanding their real-space atomic structure and dynamics of their formation remains a considerable challenge. Here, using the method of dynamic pair distribution function, we provide direct insights into the role of solid-solution additions towards the stabilization of polar nanoregions in the Pb-free ferroelectric of Ba(Zr,Ti)O3. It is shown that for an optimum level of substitution of Ti by larger Zr ions, the dynamics of atomic displacements for ferroelectric polarization are slowed sufficiently below THz frequencies, which leads to increased local correlation among dipoles within PNRs. The dynamic pair distribution function technique demonstrates a unique capability to obtain insights into locally correlated atomic dynamics in disordered materials, including new Pb-free ferroelectrics, which is necessary to understand and control their functional properties.</p>},
  author       = {Pramanick, A. and Dmowski, W. and Egami, T. and Budisuharto, A. Setiadi and Weyland, F. and Novak, N. and Christianson, A. D. and Borreguero, J. M. and Abernathy, D. L. and Jørgensen, M. R.V.},
  issn         = {0031-9007},
  language     = {eng},
  month        = {05},
  number       = {20},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Stabilization of Polar Nanoregions in Pb-free Ferroelectrics},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.120.207603},
  doi          = {10.1103/PhysRevLett.120.207603},
  volume       = {120},
  year         = {2018},
}