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Electrocaloric induced retarded ferroelectric switching

Buchacher, Till, Rokosz, M, Dorey, Robert, Allam, Jeremy and Gregory, A (2017) Electrocaloric induced retarded ferroelectric switching Applied Physics Letters, 110 (2).

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Abstract

Ferroelectric 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 effect. Here an additional EC induced retardation mechanism is proposed whereby EC induced temperature changes repeatedly temporarily prevent further FE switching during cooling cycles.

Item Type: Article
Subjects : Mechanical Engineering Sciences
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Buchacher, Tillt.buchacher@surrey.ac.ukUNSPECIFIED
Rokosz, MUNSPECIFIEDUNSPECIFIED
Dorey, Robertr.dorey@surrey.ac.ukUNSPECIFIED
Allam, JeremyJ.Allam@surrey.ac.ukUNSPECIFIED
Gregory, AUNSPECIFIEDUNSPECIFIED
Date : 9 January 2017
Identification Number : 10.1063/1.4973752
Copyright Disclaimer : Copyright 2017 AIP Publishing
Depositing User : Symplectic Elements
Date Deposited : 13 Jan 2017 17:54
Last Modified : 19 Jul 2017 08:10
URI: http://epubs.surrey.ac.uk/id/eprint/813293

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