Electrocaloric induced retarded ferroelectric switching | Zendy

Till Buchacher | Zendy; Maciej Rokosz | Zendy; Robert Dorey | Zendy; J. Allam | Zendy; Andrew Gregory | Zendy

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Electrocaloric induced retarded ferroelectric switching

Author(s) -

Till Buchacher,

Maciej Rokosz,

Robert Dorey,

J. Allam,

Andrew Gregory

Publication year - 2017

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4973752

Subject(s) - ferroelectricity , electrocaloric effect , materials science , microsecond , electric field , condensed matter physics , switching time , optoelectronics , dielectric , optics , physics , quantum mechanics

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

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