Höfling, Marion ; Trapp, Maximilian ; Porz, Lukas ; Uršič, Hana ; Bruder, Enrico ; Kleebe, Hans-Joachim ; Rödel, Jürgen ; Koruza, Jurij (2021)
Large plastic deformability of bulk ferroelectric KNbO3 single crystals.
In: Journal of the European Ceramic Society, 41 (7)
doi: 10.1016/j.jeurceramsoc.2021.02.023
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Ferroelectrics have become indispensable electroceramic materials in modern electronic applications. While point-defect engineering is a common tool to modify the properties of ferroelectrics, dislocations have not been widely considered, although they were previously shown to alter electrical properties in other oxides. Here, we study the room temperature uniaxial deformation of the perovskite ferroelectric single crystalline KNbO3 in [010]pc and [101]pc orientations. We demonstrate a large plastic deformation in the range of 5%. Dislocation and domain structure were investigated across different length scales using optical microscopy, electron channeling contrast imaging, and transmission electron microscopy. Planar arrangement of dislocations in slip bands was observed, while the predominant appearance of edge dislocations indicates a dominant dislocation motion by the kink-pair mechanism. Increased dislocation density resulted in decreased ferroelectric domain size from 1.8 μm to 0.5 μm after deformation. Piezoresponse force microscopy highlights the effect of dislocations on domain nucleation and their mobility.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Höfling, Marion ; Trapp, Maximilian ; Porz, Lukas ; Uršič, Hana ; Bruder, Enrico ; Kleebe, Hans-Joachim ; Rödel, Jürgen ; Koruza, Jurij |
| Art des Eintrags: | Bibliographie |
| Titel: | Large plastic deformability of bulk ferroelectric KNbO3 single crystals |
| Sprache: | Englisch |
| Publikationsjahr: | 25 März 2021 |
| Verlag: | Elsevier Science Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the European Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 41 |
| (Heft-)Nummer: | 7 |
| DOI: | 10.1016/j.jeurceramsoc.2021.02.023 |
| URL / URN: | https://www.sciencedirect.com/science/article/abs/pii/S09552... |
| Kurzbeschreibung (Abstract): | Ferroelectrics have become indispensable electroceramic materials in modern electronic applications. While point-defect engineering is a common tool to modify the properties of ferroelectrics, dislocations have not been widely considered, although they were previously shown to alter electrical properties in other oxides. Here, we study the room temperature uniaxial deformation of the perovskite ferroelectric single crystalline KNbO3 in [010]pc and [101]pc orientations. We demonstrate a large plastic deformation in the range of 5%. Dislocation and domain structure were investigated across different length scales using optical microscopy, electron channeling contrast imaging, and transmission electron microscopy. Planar arrangement of dislocations in slip bands was observed, while the predominant appearance of edge dislocations indicates a dominant dislocation motion by the kink-pair mechanism. Increased dislocation density resulted in decreased ferroelectric domain size from 1.8 μm to 0.5 μm after deformation. Piezoresponse force microscopy highlights the effect of dislocations on domain nucleation and their mobility. |
| Freie Schlagworte: | KNbO3, Single crystal, Ferroelectric, Plastic deformation |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe |
| Hinterlegungsdatum: | 26 Mär 2021 06:51 |
| Letzte Änderung: | 26 Mär 2021 06:51 |
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