Domain reversal and nonstoichiometry in lithium tantalate

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

Research output: Contribution to journalArticlepeer-review

158 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 languageEnglish (US)
Pages (from-to)2949-2963
Number of pages15
JournalJournal of Applied Physics
Volume90
Issue number6
DOIs
StatePublished - Sep 15 2001

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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