1. Temperature-dependent evolution of crystallographic and domain structures in (K, Na, Li)(Ta, Nb)O3 piezoelectric single crystals
- Author
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Leopoldo Molina-Luna, Alexander Zintler, Daniel Rytz, Hairui Liu, Philippe Veber, Jurij Koruza, Mario Maglione, Department of Materials and Earth Sciences [Darmstadt], Technische Universität Darmstadt (TU Darmstadt), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut Lumière Matière [Villeurbanne] (ILM), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, FEE, and FEE GmBh
- Subjects
010302 applied physics ,Materials science ,Acoustics and Ultrasonics ,02 engineering and technology ,Crystal structure ,[CHIM.MATE]Chemical Sciences/Material chemistry ,Atmospheric temperature range ,021001 nanoscience & nanotechnology ,01 natural sciences ,Ferroelectricity ,Crystal ,Condensed Matter::Materials Science ,Tetragonal crystal system ,Crystallography ,0103 physical sciences ,Curie temperature ,Orthorhombic crystal system ,Electrical and Electronic Engineering ,0210 nano-technology ,Instrumentation ,Single crystal - Abstract
International audience; (K,Na)NbO 3 -based ferroelectric single crystals have recently undergone a substantial development, resulting in improved crystal quality and large piezoelectric coefficients, exceeding 700 pC/N, over a broad temperature range. However, further development necessitates a detailed understanding of the mechanisms defining the domain structure and its temperature evolution. This paper presents the investigation into the crystallographic structure and domain configurations of a (K,Na,Li)(Ta,Nb)O 3 single crystal over a broad temperature range. The crystal was grown by the submerged-seed solution growth technique and investigated using in situ transmission electron microscopy, X-ray diffraction, dielectric measurements, and polarized light microscopy. The lattice distortion, structural phase transitions, and domain configurations are reported. A transition from the lamellar orthorhombic to the rectangular tetragonal domain structure is observed upon heating. Moreover, the milky optical appearance of the crystal was investigated and found to result from the presence of regions with different domain configurations and domain sizes. The formation of these regions is related to the growth defects, which govern the domain formation when cooling below the Curie temperature.
- Published
- 2018