Dielectric properties of lithium niobate–tantalate crystals

Xue, Dongfeng; Betzler, K.; Hesse, H.

doi:10.1016/s0038-1098(00)00243-x

Cited by 43 publications

(14 citation statements)

References 25 publications

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“…Previous work shows that many physical properties of LN crystals depend strongly on the crystal composition [4][5][6]. Nb atoms in the LN crystallographic frame have two selectable sites: the normal Nb 5+ site and Nb Li 4+ antisite.…”

Section: Crystal Structurementioning

confidence: 99%

Defects and domain engineering of lithium niobate crystals

Xue

Kitamura

2005

Materials Science and Engineering: B

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Section: Crystal Structurementioning

confidence: 99%

Defects and domain engineering of lithium niobate crystals

Xue

Kitamura

2005

Materials Science and Engineering: B

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“…Despite the huge potential in electro-optic and acoustooptic devices and the extensive use of the end-compounds LN and LT, relatively few is known about the mixed crystals [4]. This is mainly to the difficulty to grow compositionally homogeneous crystals with traditional methods such as the Czochralski growth from a lithium rich melt.…”

Section: Introductionmentioning

confidence: 99%

Vibrational fingerprints of LiNbO<inf>3</inf>-LiTaO<inf>3</inf> mixed crystals

Sanna

Riefer

Neufeld

et al. 2012

Proceedings of ISAF-ECAPD-PFM 2012

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The structural and vibrational properties of lithium niobate (LN) -lithium tantalate (LT) mixed crystals (LNT, LiNb 1-x Ta x O 3 ) are investigated over the whole composition range by first-principles simulations. The crystal volume grows roughly linearly from LT to LN, whereby the lattice parameters a and c show minor deviations from the Vegard behavior between the end-compounds, LiNbO 3 and LiTaO 3 . Our calculations in the framework of the density functional theory show the TO 1 , TO 2and TO 4 -modes to become harder with increasing Nb concentration. TO 3 becomes softer with increasing Nb content, instead. The frequency shifts of the zone center A 1 -TO phonon modes for crystals with different compositions are found to be as large as 30 cm -1 . Raman spectroscopy, which is sensitive to the A 1 modes, can be therefore employed to determine the crystal composition.

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“…These materials can be modeled as monoclinic materials. Xue (2000) studied the dielectric properties of Lithium tantalate and Lithium niobate. It is well known in the literature that the earth medium is not at all isotropic and homogeneous throughout, but it is anisotropic and inhomogeneous.…”

mentioning

confidence: 99%

Effects of irregularity and anisotropy on the propagation of shear waves

Chattopadhyay¹,

Gupta²,

Sharma³

et al. 2010

Int. J. Eng. Sci. Tech

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The propagation of shear waves differs between geo-media due to layer's structure and irregularity present in different layers. This paper studies the propagation of shear waves in a monoclinic layer with irregularity lying between two isotropic semiinfinite elastic medium. The displacement in the monoclinic layer is obtained by using perturbation technique. Then the dispersion relation is found in the assumed medium and is verified with the standard known results. Finally, effects of wave number and irregularity are studied numerically and the graphs are plotted for all cases. The dispersion curves for different size of irregularity are calculated and compared.

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Dielectric properties of lithium niobate–tantalate crystals

Cited by 43 publications

References 25 publications

Defects and domain engineering of lithium niobate crystals

Defects and domain engineering of lithium niobate crystals

Vibrational fingerprints of LiNbO<inf>3</inf>-LiTaO<inf>3</inf> mixed crystals

Effects of irregularity and anisotropy on the propagation of shear waves

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