Domain reversal and nonstoichiometry in lithium tantalate

Sungwon Kim; Venkatraman Gopalan; K. Kitamura; Y. Furukawa

doi:10.1063/1.1389525

Domain reversal and nonstoichiometry in lithium tantalate

Sungwon Kim
, Venkatraman Gopalan
, K. Kitamura
, Y. Furukawa

Research output: Contribution to journal › Article › peer-review

191 Scopus citations

Abstract

Recent studies have shown that lithium nonstoichiometry has a tremendous influence on domain reversal characteristics in ferroelectric lithium tantalate. This work presents a systematic study of the domain reversal characteristics such as threshold coercive fields for domain reversal, domain stabilization times, "backswitching" phenomena, domain switching and wall pinning times, and sideways wall mobility in near-stoichiometric LiTaO₃ with Li/(Li+Ta)∼0.498. These properties are contrasted with those of congruent LiTaO₃ [Li/(Li+Ta)∼0.485]. A qualitative model is proposed based on nonstoichiometric dipolar defects to explain the dependence of threshold coercive field on defect density, and on repeated field cycling, the origin of domain backswitching, and domain stabilization times.

Original language	English (US)
Pages (from-to)	2949-2963
Number of pages	15
Journal	Journal of Applied Physics
Volume	90
Issue number	6
DOIs	https://doi.org/10.1063/1.1389525
State	Published - Sep 15 2001

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1063/1.1389525

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AU - Kim, Sungwon

AU - Gopalan, Venkatraman

AU - Kitamura, K.

AU - Furukawa, Y.

PY - 2001/9/15

Y1 - 2001/9/15

N2 - Recent studies have shown that lithium nonstoichiometry has a tremendous influence on domain reversal characteristics in ferroelectric lithium tantalate. This work presents a systematic study of the domain reversal characteristics such as threshold coercive fields for domain reversal, domain stabilization times, "backswitching" phenomena, domain switching and wall pinning times, and sideways wall mobility in near-stoichiometric LiTaO3 with Li/(Li+Ta)∼0.498. These properties are contrasted with those of congruent LiTaO3 [Li/(Li+Ta)∼0.485]. A qualitative model is proposed based on nonstoichiometric dipolar defects to explain the dependence of threshold coercive field on defect density, and on repeated field cycling, the origin of domain backswitching, and domain stabilization times.

AB - Recent studies have shown that lithium nonstoichiometry has a tremendous influence on domain reversal characteristics in ferroelectric lithium tantalate. This work presents a systematic study of the domain reversal characteristics such as threshold coercive fields for domain reversal, domain stabilization times, "backswitching" phenomena, domain switching and wall pinning times, and sideways wall mobility in near-stoichiometric LiTaO3 with Li/(Li+Ta)∼0.498. These properties are contrasted with those of congruent LiTaO3 [Li/(Li+Ta)∼0.485]. A qualitative model is proposed based on nonstoichiometric dipolar defects to explain the dependence of threshold coercive field on defect density, and on repeated field cycling, the origin of domain backswitching, and domain stabilization times.

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JF - Journal of Applied Physics

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Domain reversal and nonstoichiometry in lithium tantalate

Abstract

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