Electrocaloric induced retarded ferroelectric switching
| Autor: | Andrew Gregory, Robert A. Dorey, Jeremy Allam, Maciej Rokosz, Till Buchacher |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Condensed matter physics 02 engineering and technology Advanced materials 021001 nanoscience & nanotechnology 01 natural sciences Ferroelectricity Pyroelectricity Microsecond Electric field 0103 physical sciences 010306 general physics 0210 nano-technology |
| Zdroj: | Applied Physics Letters. 110:022901 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.4973752 |
| Popis: | Ferroelectric (FE) switching in bulk materials, at modest electric fields, is a relatively fast process, occurring on time scales of microseconds and less. A secondary retarded switching phenomenon also occurs on time scales of seconds and has previously been attributed to defect induced elevated energy barriers between polarisation states. As ferroelectric switching is a thermally activated process, the barrier heights are also affected by temperature, which is not constant in ferroelectric materials due to the electrocaloric (EC) effect. Here, an additional EC induced retardation mechanism is proposed whereby EC induced temperature changes repeatedly temporarily prevent further FE switching during cooling cycles. |
| Databáze: | OpenAIRE |
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