Zhang, Mao-Hua ; Zhao, Changhao ; Fulanovic, Lovro ; Rödel, Jürgen ; Novak, Nikola ; Schökel, Alexander ; Koruza, Jurij (2021)
Revealing the mechanism of electric-field-induced phase transition in antiferroelectric NaNbO3 by in situ high-energy x-ray diffraction.
In: Applied Physics Letters, 118 (13)
doi: 10.1063/5.0043050
Article, Bibliographie
Abstract
Antiferroelectric materials exhibit electric field-induced phase transitions between antiferroelectric and ferroelectric states, which enable their use in energy storage and other applications. However, the mechanisms of these transitions are insufficiently understood. Here, we considered the electric field-induced phase transition in the lead-free antiferroelectric NaNbO3. Macroscopic measurements of polarization and longitudinal, transverse, and volumetric strain were complemented with simultaneous structural investigations using high-energy x-ray radiation, yielding crystallographic strain and unit cell volume changes. The field-induced behavior can be divided into the structural antiferroelectric– ferroelectric phase transition at about 8 kV/mm and the clearly decoupled polarization switching process at about 12 kV/mm, which is associated with a large increase in polarization and strain. Decoupling of the field-induced phase transition and polarization switching is related to the randomly oriented grains and mechanical stress present at the phase boundary.
| Item Type: | Article |
|---|---|
| Erschienen: | 2021 |
| Creators: | Zhang, Mao-Hua ; Zhao, Changhao ; Fulanovic, Lovro ; Rödel, Jürgen ; Novak, Nikola ; Schökel, Alexander ; Koruza, Jurij |
| Type of entry: | Bibliographie |
| Title: | Revealing the mechanism of electric-field-induced phase transition in antiferroelectric NaNbO3 by in situ high-energy x-ray diffraction |
| Language: | English |
| Date: | 1 April 2021 |
| Publisher: | American Institute of Physics Publishing |
| Journal or Publication Title: | Applied Physics Letters |
| Volume of the journal: | 118 |
| Issue Number: | 13 |
| DOI: | 10.1063/5.0043050 |
| URL / URN: | https://aip.scitation.org/doi/10.1063/5.0043050 |
| Abstract: | Antiferroelectric materials exhibit electric field-induced phase transitions between antiferroelectric and ferroelectric states, which enable their use in energy storage and other applications. However, the mechanisms of these transitions are insufficiently understood. Here, we considered the electric field-induced phase transition in the lead-free antiferroelectric NaNbO3. Macroscopic measurements of polarization and longitudinal, transverse, and volumetric strain were complemented with simultaneous structural investigations using high-energy x-ray radiation, yielding crystallographic strain and unit cell volume changes. The field-induced behavior can be divided into the structural antiferroelectric– ferroelectric phase transition at about 8 kV/mm and the clearly decoupled polarization switching process at about 12 kV/mm, which is associated with a large increase in polarization and strain. Decoupling of the field-induced phase transition and polarization switching is related to the randomly oriented grains and mechanical stress present at the phase boundary. |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials LOEWE LOEWE > LOEWE-Schwerpunkte LOEWE > LOEWE-Schwerpunkte > FLAME - Fermi Level Engineering Antiferroelektrischer Materialien für Energiespeicher und Isolatoren |
| Date Deposited: | 07 Apr 2021 05:30 |
| Last Modified: | 07 Apr 2021 05:30 |
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