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Titolo:
Influence of nonequilibrium electrons on photovoltaic current and domain switching in poled (Pb0.85La0.15)TiO3 ferroelectric ceramics during illumination
Autore:
Choi, DG; Kim, SR; Choi, SK;
Indirizzi:
Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Yusung Gu, Taejon 305701, South Korea Korea Adv Inst Sci & Technol Taejon South Korea 305701 5701, South Korea
Titolo Testata:
FERROELECTRICS
fascicolo: 1-4, volume: 227, anno: 1999,
pagine: 123 - 132
SICI:
0015-0193(1999)227:1-4<123:IONEOP>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACOUSTIC-EMISSION; POLARIZATION;
Keywords:
nonsteady-state photovoltaic current; photoinduced domain switching; nonequilibrium electrons; space charge held; acoustic emission; (Pb0.85La0.15)TiO3 ferroelectric ceramics;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Choi, DG Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Yusung Gu, 373-1 KusungDong, Taejon 305701, South Korea Korea Adv Inst Sci & Technol 373-1 Kusung Dong Taejon South Korea 305701
Citazione:
D.G. Choi et al., "Influence of nonequilibrium electrons on photovoltaic current and domain switching in poled (Pb0.85La0.15)TiO3 ferroelectric ceramics during illumination", FERROELECTR, 227(1-4), 1999, pp. 123-132

Abstract

The variations of photovoltaic current and acoustic emission (AE) event counts with experimental parameters were observed in (Pb0.85La0.15)TiO3 ferroelectric ceramics during illumination in the absence of external electric field. Both photovoltaic current and cumulative AE event counts increased with illumination time. These results could be explained to be associated with the increase in the remanent polarization due to the photoinduced domain switching which resulted from the space charge held established by photoexcited electrons trapped at the grain boundaries. The influence of the experimental parameters on the activity of photoinduced domain switching could beexplained in terms of the mechanical strain energy, Delta G(a)(M), which acted as the energy barrier for domain wall motion and the energy associatedwith space charge held, Delta G(a)(SC), which stimulated domain wall motion.

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Documento generato il 31/03/20 alle ore 07:46:41