TY - JOUR
T1 - Domain reversal and nonstoichiometry in lithium tantalate
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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U2 - 10.1063/1.1389525
DO - 10.1063/1.1389525
M3 - Article
AN - SCOPUS:0035883943
SN - 0021-8979
VL - 90
SP - 2949
EP - 2963
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 6
ER -