Ukrainian Journal of Physical Optics 

Number  1, Volume 4,  2003

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Hyper-Rayleigh Scattering Characterization of the Movement of Lithium Ions in Li2B4O7 Crystals
1Vdovin A.V., 1Moiseyenko V.N., 2Burak Ya.V.

1Physical Department, Dnipropetrovsk National University, 13 Naukova Str., UA-49050, Dnipropetrovsk, Ukraine
2Institute of Physical Optics, 23 Dragomanov Str., UA-79005 L’viv, Ukraine

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The integral intensity of hyper-Rayleigh scattering from the bulk of nominally pure ionic conducting Li2B4O7 crystals is studied as a function of temperature in the range where a break in the temperature dependence of ionic conductivity expressed in the coordinates ln (s33T) = f (1/T) is observed. Characteristics of jump-diffusive movement of lithium ions are determined. The movement activation energy for the temperatures T> 400 K is estimated from the temperature dependences of hyper-Reyleigh scattering intensity. Its value Eam = 0.46 eV is close to that obtained from the measurements of temperature dependence of the ionic conductivity.
Key words: hyper-Rayleigh light scattering, ionic conductivity, movement activation energy
PACS: 78.35+c

doi 10.3116/16091833/4/1/38/2003

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