Crystal growth, characterization, and domain studies in lithium niobate and lithium tantalate ferroelectrics

Gopalan, Venkatraman; Sanford, Norman A.; Aust, J. A.; Kitamura, Kenji; Furukawa, Yasunori

doi:10.1016/b978-012513745-4/50037-8

Cited by 31 publications

(22 citation statements)

References 120 publications

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“…When grown in the near-stoichiometric form (nSLN, Li/Nb ~ 1) the optical properties improve significantly (Table 1) as a result of the decrease in the defect concentration [30,[46][47][48][49][50][51][52]. So nSLN is a better choice for nonlinear frequency conversion, as well as photo-refractive and holographic data storage applications [53,54] in comparison to CLN.…”

Section: Effect Of Intrinsic Defect On Propertiesmentioning

confidence: 99%

“…Hence, CLN crystals exhibit a high ferroelectric switching field ~21 kV/mm ( Table 1) that limits its use for domain engineered devices [49,56]. As the defect concentration is reduced in nSLN the coercive field becomes less than 4 kV/mm [52,53]. Even a coercive field as low as 200 V/mm has been reported for nSLN crystal grown from K2O flux [49].…”

Section: Effect Of Intrinsic Defect On Propertiesmentioning

confidence: 99%

Section: Effect Of Intrinsic Defect On Propertiesmentioning

confidence: 99%

“…Even a coercive field as low as 200 V/mm has been reported for nSLN crystal grown from K 2 O flux [49]. SLN crystals, therefore, offer favorable properties for the realization of periodically poled devices (PPLN) [54] and domain engineering [52,53] where an electric field has to be applied for poling the material. Being a ferroelectric material lithium niobate [57] undergoes a structural phase transition from a ferroelectric phase (R3c) to a paraelectric phase (R3c) at around 1140 • C. The ferroelectric-to-paraelectric phase transition temperature of LN occurs at different temperatures depending upon the Li/Nb ratio in the crystal [58,59].…”

Section: Effect Of Intrinsic Defect On Propertiesmentioning

confidence: 99%

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Control of Intrinsic Defects in Lithium Niobate Single Crystal for Optoelectronic Applications

et al. 2017

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A single crystal of lithium niobate is an important optoelectronic material. It can be grown from direct melt only in a lithium deficient non-stoichiometric form as its stoichiometric composition exhibits incongruent melting. As a result it contains a number of intrinsic point defects such as Li-vacancies, Nb antisites, oxygen vacancies, as well as different types of polarons and bipolarons. All these defects adversely influence its optical and ferroelectric properties and pose a deterrent to the effective use of this material. Hence, controlling the defects in lithium niobate has been an exciting topic of research and development over the years. In this article we discuss the different methods of controlling the intrinsic defects in lithium niobate and a comparison of the effect of these methods on the crystalline quality, stoichiometry, optical absorption in the UV-vis region, electronic band-gap, and refractive index.

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Section: Effect Of Intrinsic Defect On Propertiesmentioning

confidence: 99%

Section: Effect Of Intrinsic Defect On Propertiesmentioning

confidence: 99%

Section: Effect Of Intrinsic Defect On Propertiesmentioning

confidence: 99%

Section: Effect Of Intrinsic Defect On Propertiesmentioning

confidence: 99%

See 2 more Smart Citations

Control of Intrinsic Defects in Lithium Niobate Single Crystal for Optoelectronic Applications

et al. 2017

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“…Both LT and LN are grown by the Czochralski method. [10][11][12][13] Some advantages of using LT over LN is that it exhibits chemical and mechanical stability over a wider range of temperature than LN (melting point of LT is 1650 0 C 14 while melting point of LN is 1250 0 C…”

Section: Introductionmentioning

confidence: 99%

Point defects in ZX-cut Lithium niobate and Lithium tantalate and their influence on acousto-electric properties

Chatterjee¹,

Miller²,

Ostrovskii³

2018

Proceedings of Meetings on Acoustics

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Ferroelectric Hysteresis Measurement in the Lithium Niobate‐Lithium Tantalate Single‐Crystalline Family: Prospects for Lithium Niobate‐Tantalate

Koppitz,

Ganschow,

Rüsing

et al. 2024

Physica Status Solidi (a)

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Poling and structuring of ferroelectric domains form the basis for developing prospective applications using materials from the lithium‐niobate (LN) family. Applications range from second harmonic generation to electro‐optic modulators or surface acoustic wave devices. In the work presented here, hysteresis measurements are used as a standard method to quantitatively determine the poling properties of these ferroelectrics, including their spontaneous polarization Ps as well as their forward and reverse coercive fields Ec,+ and Ec,−. Systematic measurements that depend on parameters such as the ramp rate R of the applied poling voltage and the waiting time twait between domain inversions are investigated and compared between the congruent variants of LN, lithium tantalate (LT), their magnesium‐doped analogues, and stoichiometric LN. For bulk magnesium‐doped LN, for example, it is found that the resulting coercive field strongly depends on the speed of the voltage ramp, with values ranging from 11 to 21 kV mm−1. These investigations are used as fundamental input for poling ferroelectric lithium niobate‐tantalate solids (LNT), a system that offers a high potential for tuning the material parameters beyond what is possible for LN or LT.

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Crystal growth, characterization, and domain studies in lithium niobate and lithium tantalate ferroelectrics

Cited by 31 publications

References 120 publications

Control of Intrinsic Defects in Lithium Niobate Single Crystal for Optoelectronic Applications

Control of Intrinsic Defects in Lithium Niobate Single Crystal for Optoelectronic Applications

Point defects in ZX-cut Lithium niobate and Lithium tantalate and their influence on acousto-electric properties

Ferroelectric Hysteresis Measurement in the Lithium Niobate‐Lithium Tantalate Single‐Crystalline Family: Prospects for Lithium Niobate‐Tantalate

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