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Revealing the sequence of switching mechanisms in polycrystalline ferroelectric/ferroelastic materials

Schultheiß, Jan ; Liu, Lisha ; Kungl, Hans ; Weber, Michael ; Kodumudi Venkataraman, Lalitha ; Checchia, Stefano ; Damjanovic, Dragan ; Daniels, John E. ; Koruza, Jurij (2018)
Revealing the sequence of switching mechanisms in polycrystalline ferroelectric/ferroelastic materials.
In: Acta Materialia, 2018 (157)
doi: 10.1016/j.actamat.2018.07.018
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

Ferroelectric materials find application in numerous electronic devices and are continuously enabling the development of new technologies. Their versatility is intimately related to the unique property to switch the polarization with electric fields. However, the switching mechanisms in polycrystalline ferroelectric materials remain insufficiently understood. Here we reveal that switching in ferroelectric/ferroelastic materials consists of a sequence of individual events, separated into three regimes: rapid movement of non-180° domain walls, main switching phase with 180° and non-180° switching events, and creep-like non-180° domain wall movement. The determination of the mechanisms was enabled by a novel measurement approach, simultaneously tracking the time dynamics of switched polarization, macroscopic strain, and structural changes. Time-resolved in situ synchrotron diffraction allowed direct insight into the non-180° domain wall dynamics and lattice strains and gave evidence for strong time correlation of non-180° switching events in different grains of the polycrystalline material. The obtained results open new opportunities for targeted manipulation of individual switching events and tuning of material's functional properties.

Typ des Eintrags: Artikel
Erschienen: 2018
Autor(en): Schultheiß, Jan ; Liu, Lisha ; Kungl, Hans ; Weber, Michael ; Kodumudi Venkataraman, Lalitha ; Checchia, Stefano ; Damjanovic, Dragan ; Daniels, John E. ; Koruza, Jurij
Art des Eintrags: Bibliographie
Titel: Revealing the sequence of switching mechanisms in polycrystalline ferroelectric/ferroelastic materials
Sprache: Englisch
Publikationsjahr: 2 August 2018
Verlag: Elsevier
Titel der Zeitschrift, Zeitung oder Schriftenreihe: Acta Materialia
Jahrgang/Volume einer Zeitschrift: 2018
(Heft-)Nummer: 157
DOI: 10.1016/j.actamat.2018.07.018
Kurzbeschreibung (Abstract):

Ferroelectric materials find application in numerous electronic devices and are continuously enabling the development of new technologies. Their versatility is intimately related to the unique property to switch the polarization with electric fields. However, the switching mechanisms in polycrystalline ferroelectric materials remain insufficiently understood. Here we reveal that switching in ferroelectric/ferroelastic materials consists of a sequence of individual events, separated into three regimes: rapid movement of non-180° domain walls, main switching phase with 180° and non-180° switching events, and creep-like non-180° domain wall movement. The determination of the mechanisms was enabled by a novel measurement approach, simultaneously tracking the time dynamics of switched polarization, macroscopic strain, and structural changes. Time-resolved in situ synchrotron diffraction allowed direct insight into the non-180° domain wall dynamics and lattice strains and gave evidence for strong time correlation of non-180° switching events in different grains of the polycrystalline material. The obtained results open new opportunities for targeted manipulation of individual switching events and tuning of material's functional properties.

Freie Schlagworte: Ferroelectric Domain switching Electroceramics High-energy X-ray diffraction Gibbs energy
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: 02 Aug 2018 06:28
Letzte Änderung: 18 Mai 2020 12:58
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