Webber, Kyle G. ; Robinson, Harold C. ; Rossetti, George A. jr. ; Lynch, Christopher S. (2008)
A distributed step-like switching model of the continuous field-driven phase transformations observed in PMN–xPT relaxor ferroelectric single crystals.
In: Acta Materialia, 56 (12)
doi: 10.1016/j.actamat.2008.02.006
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The field-driven phase transformation behavior of relaxor ferroelectric single crystal PZN–xPT is discontinuous and displays well-defined forward and reverse coercive fields, whereas the same transformation in PMN–xPT is nearly continuous and occurs over a range of field levels. In analogy to the broad Curie range in relaxor ferroelectrics arising from property fluctuations at the nanometer length scale, the continuous field-driven phase transformations in PMN–xPT are modeled as a step-like series of discontinuous transformations associated with similar spatial property fluctuations. An increase in the applied field gradually increases the volume fraction of the new phase at the expense of the old phase, resulting in a continuous transition between phases. The model simulation produces excellent agreement with the measured material response of 〈0 1 1〉 cut PMN–0.32PT single crystals under conditions of cooperative stress and electric field loading.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2008 |
| Autor(en): | Webber, Kyle G. ; Robinson, Harold C. ; Rossetti, George A. jr. ; Lynch, Christopher S. |
| Art des Eintrags: | Bibliographie |
| Titel: | A distributed step-like switching model of the continuous field-driven phase transformations observed in PMN–xPT relaxor ferroelectric single crystals |
| Sprache: | Englisch |
| Publikationsjahr: | Juli 2008 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Acta Materialia |
| Jahrgang/Volume einer Zeitschrift: | 56 |
| (Heft-)Nummer: | 12 |
| DOI: | 10.1016/j.actamat.2008.02.006 |
| Kurzbeschreibung (Abstract): | The field-driven phase transformation behavior of relaxor ferroelectric single crystal PZN–xPT is discontinuous and displays well-defined forward and reverse coercive fields, whereas the same transformation in PMN–xPT is nearly continuous and occurs over a range of field levels. In analogy to the broad Curie range in relaxor ferroelectrics arising from property fluctuations at the nanometer length scale, the continuous field-driven phase transformations in PMN–xPT are modeled as a step-like series of discontinuous transformations associated with similar spatial property fluctuations. An increase in the applied field gradually increases the volume fraction of the new phase at the expense of the old phase, resulting in a continuous transition between phases. The model simulation produces excellent agreement with the measured material response of 〈0 1 1〉 cut PMN–0.32PT single crystals under conditions of cooperative stress and electric field loading. |
| Freie Schlagworte: | Dielectrics; Electroceramics; Perovskites; Ferroelectricity; Piezoelectricity |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Elektromechanik von Oxiden 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe |
| Hinterlegungsdatum: | 24 Jan 2013 12:50 |
| Letzte Änderung: | 17 Aug 2021 08:13 |
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