High-frequency dielectric measurements on electro-optic single crystals

Teague, J. R.; Rice, R.; Gerson, Robert

doi:10.1063/1.322031

Cited by 17 publications

(1 citation statement)

References 6 publications

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“…The dielectric constant measured at 40 MHz along the c-axis and a-axis of the congruent LiNbO 3 single crystal in this study is 153 and 420, respectively. It is reasonable that these values are larger than the values reported at 1.0 GHz, which were 25.1 and 45.6 for the c-axis and a-axis, respectively, at 150 • C [36]. The sample crystal becomes an ionic conductor as the temperature is raised.…”

Section: Discussionmentioning

confidence: 62%

Impedance spectroscopic studies on congruent LiNbO₃single crystal

Chen¹,

Chen

Chia

2007

J. Phys.: Condens. Matter

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Electrical impedance measurements on a congruent LiNbO 3 single crystal were performed as a function of both temperature and frequency. The measurements were carried out in the directions along the cand a-axes of the crystal. The temperature and frequency dependence of various dielectric properties have been studied. The result has revealed two remarkable dynamic relaxations: dielectric dipolar relaxation and ionic conductivity relaxation. The dipolar relaxation peaks were found at frequencies around 4 × 10 6 and 2 × 10 6 Hz for the c-axis and a-axis, respectively, and they were only slightly temperature dependent. The ionic conductivity relaxation was found at the lower-frequency end but it was temperature dependent. The temperature dependence of the dc electrical conductivity follows the Arrhenius law. It corresponds to the longrange ionic motion of Li + ions which are thermally activated with activation energy of 0.90 and 0.87 eV along the cand a-axis directions, respectively. The dc conductivities measured along the cand a-axes are very close to each other, and the value increases from 1.7 × 10 −6 to 1.9 × 10 −3 −1 cm −1 as the temperature is raised from 300 to 700 • C. The sample crystal becomes an ionic conductor as the temperature is raised.

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Section: Discussionmentioning

confidence: 62%

Impedance spectroscopic studies on congruent LiNbO₃single crystal

Chen¹,

Chen

Chia

2007

J. Phys.: Condens. Matter

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Experimental and theoretical directional dependence of optical polar phonons in the LiNbO₃ single crystal: New and complete assignment of the normal mode frequencies

Maïmounatou

Mohamadou

Erasmus

2015

Physica Status Solidi (b)

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, Phone/Fax: 00237699491389In this work, the analysis of both experimental and theoretical angular dispersion of the Raman frequencies of the optical polar phonons in LiNbO 3 (LN) single crystal has been determined with the emphasis of the determination without ambiguity of a new and complete set of the normal mode assignments that clarify long-standing debates. The coherency of such couple assignments is assessed by the computed oscillator strengths that are revealed to be in satisfactory agreement with others on the one hand and by the comparison with the oblique frequencies measured from the compilation of the Raman spectra acquired under different geometrical configurations in the 908 scheme on the other hand. Finally, the directional behavior of the quasinormal vectors has been established and discussed with regard to the symmetry mixing of modes or the mode with oblique polarization.

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3.3.17 Tetragonal, 4mm (C{4v})

Cook¹

Landolt-Börnstein - Group III Condensed Matter

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High-frequency dielectric measurements on electro-optic single crystals

Abstract: A slotted line was used to measure the high-frequency dielectric constant and loss tangent of several electro-optic crystals useful for wide-band laser modulator applications. Dielectric measurements were made at 0.1, 0.3, 1.0, and 2.0 GHz.

Cited by 17 publications

References 6 publications

Impedance spectroscopic studies on congruent LiNbO₃single crystal

Impedance spectroscopic studies on congruent LiNbO₃single crystal

Experimental and theoretical directional dependence of optical polar phonons in the LiNbO₃ single crystal: New and complete assignment of the normal mode frequencies

3.3.17 Tetragonal, 4mm (C{4v})

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High-frequency dielectric measurements on electro-optic single crystals

Abstract: A slotted line was used to measure the high-frequency dielectric constant and loss tangent of several electro-optic crystals useful for wide-band laser modulator applications. Dielectric measurements were made at 0.1, 0.3, 1.0, and 2.0 GHz.

Cited by 17 publications

References 6 publications

Impedance spectroscopic studies on congruent LiNbO3single crystal

Impedance spectroscopic studies on congruent LiNbO3single crystal

Experimental and theoretical directional dependence of optical polar phonons in the LiNbO3 single crystal: New and complete assignment of the normal mode frequencies

3.3.17 Tetragonal, 4mm (C{4v})

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Product

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About

Impedance spectroscopic studies on congruent LiNbO₃single crystal

Impedance spectroscopic studies on congruent LiNbO₃single crystal

Experimental and theoretical directional dependence of optical polar phonons in the LiNbO₃ single crystal: New and complete assignment of the normal mode frequencies