Non-Linear Optic Polarization in Lithium Sulphate Monohydrate Crystals

Czapla, Z.; Debska, M; Лебедева, Е. Л.; Pirozerskiĭ, A. L.

doi:10.12693/aphyspola.99.539

Cited by 3 publications

(2 citation statements)

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“…The growth by slow evaporation of LSMH crystals has been studied by Priya et al [17]. The nonlinear optical polarization, temperature dependences of the pyroelectric coefficient and of the spontaneous polarization of LSMH have also been investigated [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Structural, optical and dielectric studies of lithium sulphate monohydrate single crystals

Najar

Vakil

Want

2017

Materials Science-Poland

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Optical, dielectric, and thermal properties of lithium sulphate monohydrate crystals grown by slow evaporation method have been studied. The crystal structure was resolved by direct methods using single crystal X-ray diffraction data collected at room temperature and refined by full-matrix least-squares procedures to a final R-value of 0.0174. Plasma energy, Penn gap, Fermi energy and electronic polarizability of the grown crystal were calculated from single crystal XRD data. The electronic polarizability of lithium sulfate monohydrate was also calculated and compared with the theoretical data using Clausius-Mossotti equation. Optical band gap calculated from optical data for the grown crystal is 4.49 eV. Fourier Transform Infrared Spectroscopy study confirmed the presence of water in the crystal structure. The AC conductivity, dielectric constant and dielectric loss of the grown crystal were systemically investigated, showing a peak at about 130°C which could be attributed to the water molecules in the crystal structure. The anomalous dielectric properties shown by the crystal have been correlated with its thermal behavior. The title crystal obeys Jonscher's power law relation; σ(ω) = σ o + Aω s , with temperature dependent exponent s < 1. The activation energy calculated for the material is 0.24 eV and suggests protonic conduction by hopping mechanism in addition to cationic conduction by lithium ions. The micro-indentation study was also carried out which revealed that the crystal belongs to a category of soft materials.

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Section: Introductionmentioning

confidence: 99%

Structural, optical and dielectric studies of lithium sulphate monohydrate single crystals

Najar

Vakil

Want

2017

Materials Science-Poland

View full text Add to dashboard Cite

show abstract

“…Priya et al [14] have reported the growth and various properties of the crystal grown by the slow evaporation method; the size of the grown crystal was 14 Â 8 Â 5 mm 3 . Czapla et al [15] have investigated the steady state nonlinear optical polarization in lithium sulfate crystal. In the phase matched direction Bohaty et al [16] have observed high efficiency conversion from pump power to Stokes and anti-Stokes lines by the cascaded selfstimulated Raman scattering effect.…”

Section: Introductionmentioning

confidence: 99%