Electrical properties of LiNbO3 crystals reduced in a hydrogen atmosphere

Yatsenko, A. V.; Yevdokimov, S. V.; Pritulenko, A. S.; Sugak, D.; Solskii, I.

doi:10.1134/s1063783412110339

Cited by 29 publications

(13 citation statements)

References 29 publications

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“…Similar anisotropy was observed for the polaron conduction in LN crystals passed reducing annealing in hydrogen (σ ⊥ /σ || ~ 1.34) [15]. Moreover, it was mentioned previously [16] that diffusivities of deute rium along the polar and nonpolar directions in the LN crystal differ only by 10%.…”

Section: Results Of the Experimentssupporting

confidence: 80%

Specific features of electrical conductivity of LiTaO3 and LiNbO3 crystals in the temperature range of 290–450 K

et al. 2015

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The electrical conductivity of single crystals of lithium tantalate and lithium niobate of the con gruent composition not subjected to special thermochemical treatments has been investigated in the temper ature range of 290-450 K. It has been shown that the charge transfer mechanisms and carrier types in these crystals are identical in the temperature range under study. The presence of mobility anisotropy of conduction electrons has been revealed and its influence on the recording and storage of optical phase holograms in these crystals has been established.

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Section: Results Of the Experimentssupporting

confidence: 80%

Specific features of electrical conductivity of LiTaO3 and LiNbO3 crystals in the temperature range of 290–450 K

et al. 2015

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“…However, a great variety of conductivity measurements done by impedance spectroscopy or by the four-probe dc method are published. 29,[37][38][39][40][41][42] These techniques are not selectively sensitive to Li and often it is unclear which species contributes to conductivity. As well as lithium, hydrogen and electrons are possible charge carriers.…”

Section: Introductionmentioning

confidence: 99%

Lithium diffusion in congruent LiNbO3 single crystals at low temperatures probed by neutron reflectometry

Hüger

Rahn

Stahn

et al. 2014

Phys. Chem. Chem. Phys.

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The self-diffusion of lithium in congruent LiNbO3 single crystals was investigated at low temperatures between 379 and 523 K by neutron reflectometry. From measurements on (6)LiNbO3 (amorphous film)/(nat)LiNbO3 (single crystal) samples, Li self-diffusivities were determined in single crystals down to extremely low values of 1 × 10(-25) m(2) s(-1) on small length scales of 1-10 nm. The measured diffusivities are in excellent agreement with (extrapolated) literature data obtained by experiments based on Secondary Ion Mass Spectrometry and Impedance Spectroscopy. The tracer diffusivities can be described by a single Arrhenius line over ten orders of magnitude with an activation enthalpy of 1.33 eV, which corresponds to the migration energy of a single Li vacancy. A deviation from the Arrhenius behaviour at low temperatures, e.g., due to defect cluster formation is not observed.

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“…These changes are expected to be in large parts the result of defect clusters, which are also responsible for the non-stoichiometry. For the realization of the congruent composition, the most reliable model consists of a niobium antisite atom which is compensated by four lithium vacancies, which can be written in Kröger-Vink notation as [54][55][56] Up to now, diffusion experiments on LiNbO 3 were done mainly by nuclear magnetic resonance (NMR) studies and also by impedance spectroscopy [2,13,[57][58][59][60][61][62][63], while most of the data are limited to the high-temperature range above 880 K. There, diffusion is very fast and the defect complexes are destabilized.…”

Section: Lithium Niobatementioning

confidence: 99%

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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Electrical properties of LiNbO3 crystals reduced in a hydrogen atmosphere

Cited by 29 publications

References 29 publications

Specific features of electrical conductivity of LiTaO3 and LiNbO3 crystals in the temperature range of 290–450 K

Specific features of electrical conductivity of LiTaO3 and LiNbO3 crystals in the temperature range of 290–450 K

Lithium diffusion in congruent LiNbO3 single crystals at low temperatures probed by neutron reflectometry

Slow Lithium Transport in Metal Oxides on the Nanoscale

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