Schmitt, Ljubomira A. ; Kleebe, Hans-Joachim (2010)
Single Grains Hosting Two Space Groups: A Transmission Electron Microscopy Study of a Lead-Free Ferroelectric.
In: Functional Materials Letters, 03 (01)
doi: 10.1142/s1793604710000920
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
In this letter, conclusive experimental evidence is presented for the coexistence of two phases within individual grains in the system (Bi0.5Na0.5TiO3)0.91-(BaTiO3)0.06-(K0.5Na0.5NbO3)0.03. Electron diffraction data unequivocally reveal the presence of a rhombohedral and a tetragonal phase with space group R3c and P4bm, respectively, both on the nanoscale level. Superlattice reflections, observed in the corresponding selected area electron diffraction, were used to identify the rhombohedral and tetragonal phase present at different regions within one grain. It is thought that the rhombohedral phase acts as a nucleation site for the phase transformation monitored under applied electrical field. The coexistence of these two phases in conjunction with the triggered tetragonal to rhombohedral phase transformation rationalizes the high bipolar and unipolar strain recorded for this lead-free ferroelectric material.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2010 |
| Autor(en): | Schmitt, Ljubomira A. ; Kleebe, Hans-Joachim |
| Art des Eintrags: | Bibliographie |
| Titel: | Single Grains Hosting Two Space Groups: A Transmission Electron Microscopy Study of a Lead-Free Ferroelectric |
| Sprache: | Deutsch |
| Publikationsjahr: | März 2010 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Functional Materials Letters |
| Jahrgang/Volume einer Zeitschrift: | 03 |
| (Heft-)Nummer: | 01 |
| DOI: | 10.1142/s1793604710000920 |
| Kurzbeschreibung (Abstract): | In this letter, conclusive experimental evidence is presented for the coexistence of two phases within individual grains in the system (Bi0.5Na0.5TiO3)0.91-(BaTiO3)0.06-(K0.5Na0.5NbO3)0.03. Electron diffraction data unequivocally reveal the presence of a rhombohedral and a tetragonal phase with space group R3c and P4bm, respectively, both on the nanoscale level. Superlattice reflections, observed in the corresponding selected area electron diffraction, were used to identify the rhombohedral and tetragonal phase present at different regions within one grain. It is thought that the rhombohedral phase acts as a nucleation site for the phase transformation monitored under applied electrical field. The coexistence of these two phases in conjunction with the triggered tetragonal to rhombohedral phase transformation rationalizes the high bipolar and unipolar strain recorded for this lead-free ferroelectric material. |
| Freie Schlagworte: | Lead-free piezoceramics; domain structure; transmission electron microscopy (TEM); selected area electron diffraction; dark field imaging |
| Zusätzliche Informationen: | SFB 595 B3 |
| Fachbereich(e)/-gebiet(e): | DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > B - Charakterisierung > Teilprojekt B3: Strukturelle Untersuchungen zur Aufklärung der elektrischen Ermüdung in PZT DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > B - Charakterisierung DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung Zentrale Einrichtungen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche DFG-Sonderforschungsbereiche (inkl. Transregio) |
| Hinterlegungsdatum: | 10 Aug 2011 11:33 |
| Letzte Änderung: | 05 Mär 2013 09:51 |
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