Analysis of diffusion in lithium niobate

Birnie, Dunbar P.

doi:10.1007/bf00357800

Cited by 95 publications

(64 citation statements)

References 74 publications

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“…This result is in agreement with the assumption of a + ′ Li Li .... (Nb 4 ) V defect structure in order to explain off-stoichiometry [64]. The higher diffusivities of the congruent sample compared to the near-stoichiometric samples is simply due to a higher Li vacancy concentration.…”

Section: Lithium Niobatesupporting

confidence: 89%

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Slow Lithium Transport in Metal Oxides on the Nanoscale

Uhlendorf

Ruprecht

Witt

et al. 2017

Zeitschrift Für Physikalische Chemie

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This article reports on Li self-diffusion in lithium containing metal oxide compounds. Case studies on LiNbO 3 , Li 3 NbO 4 , LiTaO 3 , LiAlO 2 , and LiGaO 2 are presented. The focus is on slow diffusion processes on the nanometer scale investigated by macroscopic tracer methods (secondary ion mass spectrometry, neutron reflectometry) and microscopic methods (nuclear magnetic resonance spectroscopy, conductivity spectroscopy) in comparison. Special focus is on the influence of structural disorder on diffusion.

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Section: Lithium Niobatesupporting

confidence: 89%

“…due to defect cluster formation was not observed. The activation energy is lower than that found in the high temperature range by SIMS experiments by about 30 % [64]. This can be explained by the fact that above 773 K significant vacancy formation according to the reaction…”

Section: Lithium Niobatecontrasting

confidence: 58%

Slow Lithium Transport in Metal Oxides on the Nanoscale

Uhlendorf

Ruprecht

Witt

et al. 2017

Zeitschrift Für Physikalische Chemie

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“…[18]. However, Niitsu et al [19] observed higher dielectric relaxation frequencies in wafers cut perpendicular to the polar axis (Z-cut) than in the samples cut parallel to the c-axis and attributed this to polarization effects.…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature DC Conductivity of LiNbO₃ Single Crystals

Ruprecht¹,

Rahn

Schmidt

et al. 2012

Zeitschrift Für Physikalische Chemie

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We report on conductivity measurements of LiNbO 3 single crystals with congruent composition in ambient atmosphere between 449 and 727 K which include the lowest temperatures covered so far. The ionic DC conductivity observed along the c-axis at, e. g., 650 K is 6.7 × 10 −9 S/cm and shows an activation energy of 1.33 eV. The corresponding Li + diffusion coefficients range between 2.5 × 10 −22 and 1.4 × 10 −16 m 2 /s. These results are perfectly consistent with our conductivity results in the high-temperature regime as well as SIMS measurements published recently (Rahn et al., Phys. Chem. Chem. Phys. 14 (2012) 2427. From the Li + diffusion coefficients obtained here a Haven ratio of 0.7(2) can be deduced.

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“…[21][22][23] It was considered that electrons and lithium can be cemented out in the same time, and the crystals be nearly completely oxidized by this extreme method. In our experiments, the Fe: CLN crystals were heated to 700 • C for 6 hours with the max electric field of 125 V/mm while the max electric current of 0.01 mA/mm 2 .…”

Section: Resultsmentioning

confidence: 99%

Investigation on p-type lithium niobate crystals

Pei

Kong

et al. 2011

AIP Advances

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Till now it is difficult to obtain a p-type lithium niobate crystal. Here the carrier types in various doped and oxidized LiNbO3 crystals have been investigated by holographic technique. The experimental results show tetravalent ions (Zr4+ and Hf4+) with doping concentrations just above optical damage resistant thresholds is helpful to increase the concentration of holes. And 3.0 mol% ZrO2 doped LiNbO3 can be used as a p-type crystal. The dominant carrier of iron doped LiNbO3 crystal can be changed to holes when treated by thermo-electric oxidization. Then the possible mechanism on how to obtain a p-type LiNbO3 was discussed

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Analysis of diffusion in lithium niobate

Cited by 95 publications

References 74 publications

Slow Lithium Transport in Metal Oxides on the Nanoscale

Slow Lithium Transport in Metal Oxides on the Nanoscale

Low-Temperature DC Conductivity of LiNbO₃ Single Crystals

Investigation on p-type lithium niobate crystals

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Analysis of diffusion in lithium niobate

Cited by 95 publications

References 74 publications

Slow Lithium Transport in Metal Oxides on the Nanoscale

Slow Lithium Transport in Metal Oxides on the Nanoscale

Low-Temperature DC Conductivity of LiNbO3 Single Crystals

Investigation on p-type lithium niobate crystals

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Product

Resources

About

Low-Temperature DC Conductivity of LiNbO₃ Single Crystals