TU Darmstadt / ULB / TUbiblio

Stabilization of Polar Nanoregions in Pb-free Ferroelectrics

Pramanick, A. and Dmowski, W. and Egami, T. and Budisuharto, A. Setadi and Weyland, Florian and Novak, Nikola and Christanson, A.D. and Borreguero, J.M. and Abernathy, D.L. and Jørgensen, M.R.V. :
Stabilization of Polar Nanoregions in Pb-free Ferroelectrics.
In: Physical Review Letters, 120 (207603) pp. 1-7. ISSN 0031-9007
[Article] , (2018)

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 slowed sufficiently below THz frequencies, which leads to increased local correlationamong 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.

Item Type: Article
Erschienen: 2018
Creators: Pramanick, A. and Dmowski, W. and Egami, T. and Budisuharto, A. Setadi and Weyland, Florian and Novak, Nikola and Christanson, A.D. and Borreguero, J.M. and Abernathy, D.L. and Jørgensen, M.R.V.
Title: Stabilization of Polar Nanoregions in Pb-free Ferroelectrics
Language: English
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 slowed sufficiently below THz frequencies, which leads to increased local correlationamong 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.

Journal or Publication Title: Physical Review Letters
Volume: 120
Number: 207603
Publisher: American Physical Society
Divisions: 11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences
Date Deposited: 22 May 2018 07:57
DOI: 10.1103/PhysRevLett.120.207603
Export:

Optionen (nur für Redakteure)

View Item View Item