Polarization properties and a local structure of (GeSe₂)x(Sb2Se₃)₁-x glasses
The results of investigating different parameters (of glasses in Ge-Sb-Se system have been given. The values of structural-sensitive molar IR polarization F have been calculated and its concentrational dependence has been constructed. The polarity of chemical bonds has been estimated. It has been sh...
Збережено в:
| Дата: | 2002 |
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| Автори: | , , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України
2002
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| Назва видання: | Semiconductor Physics Quantum Electronics & Optoelectronics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/121346 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Polarization properties and a local structure of (GeSe₂)x(Sb2Se₃)₁-x glasses / V.I. Malesh, V.V. Rubish, I.I. Shpak, V.M. Rubish, P.P. Puha // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2002. — Т. 5, № 4. — С. 385-390. — Бібліогр.: 19 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | The results of investigating different parameters (of glasses in Ge-Sb-Se system have been given. The values of structural-sensitive molar IR polarization F have been calculated and its concentrational dependence has been constructed. The polarity of chemical bonds has been estimated. It has been shown that with increasing the content of Sb₂Se₃ in the composition of the glasses the polarity of Sb-Se bonds rises. Within the limits of free volume conception the formation energy (Eh) and the volume (Vh) of microcavities have been calculated. Eh and Vh are structural-sensitive parameters of glassy materials.
It has been shown that the inflection is observed in concentrational dependences of investigated and calculated parameters of (GeSe₂)x(Sb₂Se₃)₁-x glasses in the vicinity of x = 0.60. It testifies to the structural changes in the glasses while changing the composition.
The structure of (GeSe₂)x(Sb₂Se₃)₁-x glasses is mainly determined by structural units GeSe₄/₂ and SbSe₃/₂, to be statistically distributed into matrices. The increase of Sb₂Se₃ content in GeSe₂ is accompanied by a gradual transition from tetrahedrally co-ordinated structural units in glassy GeSe₂, to trigonally co-ordinated - in Sb₂Se₃. |
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