Investigation of Jerky Domain Wall Motion in Lithium Niobate

Батурин, И. С.; Konev, M. V.; Ахматханов, А. Р.; Lobov, A. I.; Shur, V. Ya.

doi:10.1080/00150190802427531

Cited by 33 publications

(31 citation statements)

References 21 publications

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“…7(b)-7(d)). Such behavior qualitatively differs from the jumplike change of the domain shape, 42 which is typical for the kinetics of the usual domains in VTE-LT. 35 In terms of the proposed approach, the kinetics of fatigue effect represents the growth and merging of the CDW areas. Thus, the experimental dependence of the fraction of switched charge on the cycle number q(N) can be fitted by K-A formula modified for finite media (13) (Fig.…”

Section: Experimental Verification Of the Proposed Modelmentioning

confidence: 66%

Fatigue effect in ferroelectric crystals: Growth of the frozen domains

Shur

Ахматханов

Батурин

2012

Journal of Applied Physics

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The model of the fatigue effect during cyclic switching caused by growth of the frozen domain area with charged domain walls has been proposed. It was claimed on the basis of the previous experimental results that for switching in increasing field the frozen domain area started to grow at the given sub-threshold field value and stopped at the threshold field. The influence of the shape and frequency of the field pulses used for cyclic switching has been considered. The uniaxial ferroelectric stoichiometric lithium tantalate single crystals produced by vapor transport equilibration with record low value of coercive field have been chosen as a model material for experimental verification of the model. The formation of the charged domain walls as a result of cyclic switching has been revealed by analysis of the domain images obtained by optical and Raman confocal microscopy. It has been shown that the fatigue degree is equal to the fraction of the frozen domain area. The experimental dependence of the switched charge on the cycle number has been successfully fitted by modified Kolmogorov-Avrami formula. The experimentally observed frequency independence of fatigue profile for rectangular pulses and frequency dependence for triangular pulses has been explained by proposed model.

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Section: Experimental Verification Of the Proposed Modelmentioning

confidence: 66%

Fatigue effect in ferroelectric crystals: Growth of the frozen domains

Shur

Ахматханов

Батурин

2012

Journal of Applied Physics

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“…The determined generation of the steps (position of the nucleation sites) at the vertices of the polygon-shape domain at low temperatures resulted in the effect of domain shape stability after domain merging. 12,36 For instance, hexagon domain with Y oriented domain walls was formed after merging of two hexagon domains. 11,12,36 The independent domain growth after merging in the case of stochastic nucleation resulted in formation of complicated domain shapes including dendrite-like domain structures.…”

Section: Discussionmentioning

confidence: 99%

“…12,36 For instance, hexagon domain with Y oriented domain walls was formed after merging of two hexagon domains. 11,12,36 The independent domain growth after merging in the case of stochastic nucleation resulted in formation of complicated domain shapes including dendrite-like domain structures. The substitution of the dominated nucleation mechanism at the elevated temperature can be attributed to change of the mechanism of electrical conductivity from anisotropic electronic to isotropic ionic one.…”

Section: Discussionmentioning

confidence: 99%

Formation of dendrite domain structures in stoichiometric lithium niobate at elevated temperatures

Shur

Chezganov

Nebogatikov

et al. 2012

Journal of Applied Physics

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Light-induced superlow electric field for domain reversal in near-stoichiometric magnesium-doped lithium niobate J. Appl. Phys. 107, 063514 (2010) Formation of the dendrite-type self-organized domain structures during polarization reversal at elevated temperatures (above 230 C) has been revealed and studied in stoichiometric lithium niobate LiNbO 3 single crystals. Optical, confocal Raman, scanning electron, and piezoelectric force microscopy have been used for domain visualization. It has been shown experimentally that formation of the dendrite-like structures has been attributed to correlated nucleation caused by a field distribution in the vicinity of the charged domain walls. V C 2012 American Institute of Physics.

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“…15 stages of domain shape evolution can be separated. The first stage represents formation of the polygon with two concave angles, ten Y walls, and two X walls (10Y 1 2X) just after domain merging (Fig.…”

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confidence: 99%

“…Such evolution of the domain shape leads to domain shape stability. 15 Eventually, the hexagonal domain shape with Y oriented walls prevails in SLT even during domain merging.…”

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confidence: 99%