Microwave resonant dielectric dispersion in SbS<sub>0.7</sub>Se<sub>0.3</sub>I crystals

Kalesinskas, V.; Grigas, J.; Audzionis, A.; ŽlČkus, K.

doi:10.1080/01411598308243021

Cited by 17 publications

(11 citation statements)

References 18 publications

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“…As seen from Figs. (5,6,8,10) in the SbSe x S 1Àx I (x=0, 0.15, 0.45) crystals the IR soft mode observed and ferroelectric phase transition takes place. But in the SbSeI crystals nor IR soft mode nor the ferroelectric phase transition takes place.…”

Section: Article In Pressmentioning

confidence: 92%

“…In these crystals, the phase transition takes place when the temperature attains the point corresponding to kT C =DV C . We have found that in SbSe x S 1-x I, SbSBr x I 1-x , Bi x Sb 1-x SI, the B 1u soft mode has two components: the soft mode in the microwave region [8,10,13] and the soft mode in the IR (infrared) spectral range. The reasons of existence of the two components of the soft mode were described detail in Refs.…”

Section: Introductionmentioning

confidence: 96%

“…They are influenced by light, leading to photoconductivity, photoferroelecticity, etc. Solid solutions of various combinations SbSISbSeI [6][7][8], SbSI-SbSBr [9,10], BiSI-SbSI [11][12][13] have been most intensively studied because they have the Curie temperatures depending on mixture composition. For example, the solid solutions SbSe x S 1-x I have the Curie temperature T C = 0-293 K, when x varies from 1 to 0.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Origin of soft mode in SbSexS1–xI crystals

Audzijonis¹,

Žigas²,

Siroic³

et al. 2004

Physica B: Condensed Matter

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Section: Article In Pressmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Origin of soft mode in SbSexS1–xI crystals

Audzijonis¹,

Žigas²,

Siroic³

et al. 2004

Physica B: Condensed Matter

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“…Besides the practical use, SbSe x S 1Àx I is an interesting object of fundamental research. At present there is a lot of information on its physical [4,5] and dielectric properties [6].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the vibrational spectrum of SbSeI crystals in harmonic and in the anharmonic approximations

Audzijonis¹,

Klingshirn

Žigas³

et al. 2007

Physica B: Condensed Matter

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The reflectivity spectrum RðoÞ of SbSeI crystals was experimentally studied in the spectral range of 102300 cm À1 over a wide range of temperatures (10-297 K) with light polarization Ekc and E ? c . The spectra of optical constants and optical functions were calculated using the Kramers-Kronig and optical parameter fitting methods. The dependence of the frequencies o T and o L of the low-frequency B 1u mode (for Ekc) on temperature was obtained from the experiment. From spectra e ll ðoÞ and Imðe À1 ÞðoÞ the frequencies o L and o T of B 1u normal modes were found at temperatures 10-297 K. The frequencies of normal modes and amplitudes of normal coordinates were calculated by diagonalization of the dynamical matrix in harmonic approximation. The properties of the low-frequency B 1u mode are explained in anharmonic approximation by employing the average potential energy function V ðzÞ. The latter is strongly anharmonic and thus causes the frequency of this mode to show a quite strong temperature dependence. The interaction between phonons creates the anharmonicity of low-frequency B 1u vibrational mode. r

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“…The reasons of the T C growth with increasing x in these crystals have not yet been explored. The IR vibrational and dielectric spectra and physical properties of mixed BiSI-SbSI, SbSI-SbSeI, SbSI-SbSBr crystals have been investigated by various groups for a long time [6][7][8]. However, the vibrational spectra were theoretically studied only for pure SbSItype crystals [9].…”

Section: Introductionmentioning

confidence: 99%

Growing of SbO_xS_1-xI crystals and investigation of vibrational spectra in the phase transition region

Audzijonis¹,

Žigas²,

Žaltauskas³

et al. 2004

Lith. J. Phys.

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SbOxS1−xI (x = 0−0.5) crystals have been grown from the vapour phase. Reflection spectra of the SbOxS1−xI (x = 0.2) crystals were studied by a modernized Fourier spectrometer at E c. Using an improved Kramers-Kronig technique with two confining spectral limits, the spectra of optical constants and optical functions were calculated. The vibrational frequencies ωL and ωT have been evaluated. The vibrational frequencies of SbOxS1−xI (x = 0.2) chains in different phases have been calculated in the harmonic approximation. The theoretical results are compared with experimental data.

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Microwave resonant dielectric dispersion in SbS_0.7Se_0.3I crystals

Cited by 17 publications

References 18 publications

Origin of soft mode in SbSexS1–xI crystals

Origin of soft mode in SbSexS1–xI crystals

Investigation of the vibrational spectrum of SbSeI crystals in harmonic and in the anharmonic approximations

Growing of SbO_xS_1-xI crystals and investigation of vibrational spectra in the phase transition region

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Microwave resonant dielectric dispersion in SbS0.7Se0.3I crystals

Cited by 17 publications

References 18 publications

Origin of soft mode in SbSexS1–xI crystals

Origin of soft mode in SbSexS1–xI crystals

Investigation of the vibrational spectrum of SbSeI crystals in harmonic and in the anharmonic approximations

Growing of SbOxS1-xI crystals and investigation of vibrational spectra in the phase transition region

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Product

Resources

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Microwave resonant dielectric dispersion in SbS_0.7Se_0.3I crystals

Growing of SbO_xS_1-xI crystals and investigation of vibrational spectra in the phase transition region