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Electric-field-induced antiferroelectric to ferroelectric phase transition in polycrystalline NaNbO 3

Zhang, Mao-Hua and Fulanovic, Lovro and Egert, Sonja and Ding, Hui and Groszewicz, Pedro B. and Kleebe, Hans-Joachim and Molina-Luna, Leopoldo and Koruza, Jurij (2020):
Electric-field-induced antiferroelectric to ferroelectric phase transition in polycrystalline NaNbO 3.
In: Acta Materialia, 200, pp. 127-135. Elsevier, ISSN 13596454,
DOI: 10.1016/j.actamat.2020.09.002,
[Article]

Abstract

Electric-field-induced phase transitions are the most important characteristics of antiferroelectric mate- rials. However, in several prototype antiferroelectrics, these transitions are irreversible and the origin of this behavior is poorly understood. This prevents their widespread use, for example, in energy storage and memory applications. Here, we investigated the antiferroelectric-ferroelectric phase transitions in poly- crystalline NaNbO 3 , a material recently suggested as the basis for lead-free antiferroelectrics with high energy storage densities. An irreversible transition from the antiferroelectric state to a new state show- ing macroscopic piezoelectricity ( d 33 = 35 pC/N) was induced at 11.6 kV/mm (room temperature, 1 Hz), accompanied by a 33% drop in permittivity. Microscopically, a change from a translational antiferroelec- tric domain structure to a wedge-shaped ferroelectric domain structure was observed using transmis- sion electron microscopy. 23 Na solid-state nuclear magnetic resonance allowed for a detailed study of the local structure and revealed pure antiferroelectric and coexisting antiferroelectric/ferroelectric nature of the samples before and after the application of an electric field, respectively. Interestingly, despite the large electric fields applied, only 50 ±5% of the material underwent the antiferroelectric-ferroelectric phase transition, which was related to the material ´s microstructure. The temperature- and frequency- dependence of the phase transition was studied and compared to the behavior observed in lead-based antiferroelectric systems.

Item Type: Article
Erschienen: 2020
Creators: Zhang, Mao-Hua and Fulanovic, Lovro and Egert, Sonja and Ding, Hui and Groszewicz, Pedro B. and Kleebe, Hans-Joachim and Molina-Luna, Leopoldo and Koruza, Jurij
Title: Electric-field-induced antiferroelectric to ferroelectric phase transition in polycrystalline NaNbO 3
Language: English
Abstract:

Electric-field-induced phase transitions are the most important characteristics of antiferroelectric mate- rials. However, in several prototype antiferroelectrics, these transitions are irreversible and the origin of this behavior is poorly understood. This prevents their widespread use, for example, in energy storage and memory applications. Here, we investigated the antiferroelectric-ferroelectric phase transitions in poly- crystalline NaNbO 3 , a material recently suggested as the basis for lead-free antiferroelectrics with high energy storage densities. An irreversible transition from the antiferroelectric state to a new state show- ing macroscopic piezoelectricity ( d 33 = 35 pC/N) was induced at 11.6 kV/mm (room temperature, 1 Hz), accompanied by a 33% drop in permittivity. Microscopically, a change from a translational antiferroelec- tric domain structure to a wedge-shaped ferroelectric domain structure was observed using transmis- sion electron microscopy. 23 Na solid-state nuclear magnetic resonance allowed for a detailed study of the local structure and revealed pure antiferroelectric and coexisting antiferroelectric/ferroelectric nature of the samples before and after the application of an electric field, respectively. Interestingly, despite the large electric fields applied, only 50 ±5% of the material underwent the antiferroelectric-ferroelectric phase transition, which was related to the material ´s microstructure. The temperature- and frequency- dependence of the phase transition was studied and compared to the behavior observed in lead-based antiferroelectric systems.

Journal or Publication Title: Acta Materialia
Journal volume: 200
Publisher: Elsevier
Uncontrolled Keywords: Antiferroelectric NaNbO 3 Phase transition Lead free
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Earth Science > Geo-Material-Science
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Advanced Electron Microscopy (aem)
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: 16 Sep 2020 05:31
DOI: 10.1016/j.actamat.2020.09.002
Official URL: https://www.sciencedirect.com/science/article/abs/pii/S13596...
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