Lupascu, Doru C. ; Utschig, Thomas ; Shur, Vladimir Ya. ; Shur, Alevtina G. (2003)
The Dynamics of Domain Walls Determined from Acoustic Emission Measurements.
In: Ferroelectrics, 290 (1)
doi: 10.1080/00150190390222475
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The field-induced jump-like dynamics of a single planar domain wall in single crystalline uniaxial ferroelectric-ferroelastic Gd 2 (MoO 4 ) 3 and needle domains in the perovskite BaTiO 3 are compared. Acoustic emission as well as ferroelectric Barkhausen pulse measurements were performed in order to investigate time coincidences with optically observed jumps. In both crystals significant amounts of acoustic emissions occur. The coincidences of both event types in Gd 2 (MoO 4 ) 3 are determined by the particular character of extended defects in the crystal and the relative orientation of the acoustic sensor. Hardly any Barkhausen pulses but huge amounts of acoustic pulses are observed for the annihilation of needle domains. The underlying microscopic mechanisms are discussed.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2003 |
| Autor(en): | Lupascu, Doru C. ; Utschig, Thomas ; Shur, Vladimir Ya. ; Shur, Alevtina G. |
| Art des Eintrags: | Bibliographie |
| Titel: | The Dynamics of Domain Walls Determined from Acoustic Emission Measurements |
| Sprache: | Englisch |
| Publikationsjahr: | Januar 2003 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Ferroelectrics |
| Jahrgang/Volume einer Zeitschrift: | 290 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.1080/00150190390222475 |
| Kurzbeschreibung (Abstract): | The field-induced jump-like dynamics of a single planar domain wall in single crystalline uniaxial ferroelectric-ferroelastic Gd 2 (MoO 4 ) 3 and needle domains in the perovskite BaTiO 3 are compared. Acoustic emission as well as ferroelectric Barkhausen pulse measurements were performed in order to investigate time coincidences with optically observed jumps. In both crystals significant amounts of acoustic emissions occur. The coincidences of both event types in Gd 2 (MoO 4 ) 3 are determined by the particular character of extended defects in the crystal and the relative orientation of the acoustic sensor. Hardly any Barkhausen pulses but huge amounts of acoustic pulses are observed for the annihilation of needle domains. The underlying microscopic mechanisms are discussed. |
| Freie Schlagworte: | ferroelectrics; BaTiO3; Gd-2(MoO4)(3); acoustic emissions; ferroelectric Barkhausen pulses |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 18 Mai 2011 15:20 |
| Letzte Änderung: | 05 Mär 2013 09:47 |
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