Conductivity of Fe-doped LiNbO3 crystals

Barkan, I. B.; Éntin, M. V.; Marennikov, S. I.

doi:10.1002/pssa.2210440166

Cited by 11 publications

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References 6 publications

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“…25,26 However, the activation energy of the electrons, ⑀ e ϭ0.11 eV, is a little lower than the reported data ͑0.18 eV͒ 27 but is still reasonable because our sample of LiNbO 3 crystal is heavily doped with Fe, which could result in a decreased activation energy of electrons, as pointed out by Barkan, Entin, and Marennikov. 28 The initial scattering noise to input beam ratio (m o ) is assumed to be 5ϫ10 Ϫ3 , which corresponds to a scattering light intensity of about 20 W. We also assume the average angle between the scattered light and the input beam is about ϭ4 deg.…”

Section: Resultsmentioning

confidence: 99%

Temperature dependence of light‐induced scattering in a Ce:Fe:LiNbO<sub>3</sub> photorefractive crystal

Zhao¹,

Zhou

et al. 1996

Opt. Eng

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Light-induced scattering in a Ce:Fe:LiNbO 3 crystal is highly temperature dependent. By considering the effect due to thermally activated ions in a photorefractive crystal, we have shown that the photoinduced space-charge field is neutralized by the activated ions. This neutralization in turn leads to a reduction of scattering noise in the crystal. By raising the crystal temperature, we have observed a reduction in scattering noise, which is consistent with our prediction. The signal-to-noise ratio (SNR) in a two-wave mixing amplification due to thermal activation effect is analyzed. Experimental demonstrations using a Ce:Fe:LiNbO 3 crystal are provided in which we have shown that the SNR improves as the crystal temperature increases. © 1996 Society of Photo-Optical Instrumentation Engineers.

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Section: Resultsmentioning

confidence: 99%

Temperature dependence of light‐induced scattering in a Ce:Fe:LiNbO<sub>3</sub> photorefractive crystal

Zhao¹,

Zhou

et al. 1996

Opt. Eng

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“…Первое систематизированное изучение удельной электрической проводимости в серии кристаллов НЛ, выращенных из расплава с добавлением Fe 2 O 3 (от 0.004 до 0.75 mass.%) было проведено в [8]. Отмечалось резкое увеличение σ при содержании железа более, чем 0.1 mass.% по шихте, и явно нелинейная зависимость проводимости от концентрации железа при любой фиксированной температуре в области температур, близких к 400 K.…”

Section: Introductionunclassified

Влияние примеси железа на электрическую проводимость кристаллов LiNbO-=SUB=-3-=/SUB=-

Яценко¹,

Евдокимов²

2020

Физика Твердого Тела

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The electrical conductivity of a series of LiNbO3 of congruent composition with a relatively low concentration of iron (up to 0.15 wt.% Fe2O3 in the melt) was experimentally studied. It has been established that at temperatures close to 300 K, two types of centers with close activation energies make the main contribution to the electrical conductivity of these crystals. The first type of these centers — Fe2+ ions — is responsible for impurity electron conductivity with an activation energy (0.34  0.01) eV. The second type of these centers is small-radius polarons with an activation energy (0.29  0.02) eV. It was shown that for nominally pure and lightly doped “as grown” LiNbO3 crystals at T = 300 K, polaron conductivity is dominant.

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Figs. 1041 - 1084

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Conductivity of Fe-doped LiNbO3 crystals

Cited by 11 publications

References 6 publications

Temperature dependence of light‐induced scattering in a Ce:Fe:LiNbO<sub>3</sub> photorefractive crystal

Temperature dependence of light‐induced scattering in a Ce:Fe:LiNbO<sub>3</sub> photorefractive crystal

Влияние примеси железа на электрическую проводимость кристаллов LiNbO-=SUB=-3-=/SUB=-

Figs. 1041 - 1084

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