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Thermal conductivity of Ge x Sb(As) y Se 100‐x‐y glasses measured by Raman scattering spectra
Author(s) -
Gan YuLin,
Wang Li,
Su XueQiong,
Xu SiWei,
Shen Xiang,
Wang RongPing
Publication year - 2014
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.4462
Subject(s) - thermal conductivity , raman spectroscopy , chalcogenide , analytical chemistry (journal) , raman scattering , materials science , scattering , conductivity , chalcogenide glass , atmospheric temperature range , spectral line , stoichiometry , chemistry , optics , thermodynamics , physics , optoelectronics , chromatography , astronomy , composite material
We systematically measured thermal conductivity of Ge x Sb(As) 10 Se 90−x , Ge x Sb 15 Se 85−x, and Ge x Sb(As) 20 Se 80−x chalcogenide glasses by measuring their Stokes and anti‐Stokes Raman scattering spectra and estimating the temperature raised by laser irradiation via the ratio of Stoke and anti‐Stokes scattering cross‐section. We aimed at demonstrating the viability of Raman scattering method for thermal conductivity measurements, and understanding the role of chemical composition in determining thermal conductivity of the chalcogenide glasses. We found that, while the values of the thermal conductivity measured in the paper are in a range from ~0.078 to 1.120 Wm ‐1 K ‐1 that are in agreement with those reported data in the literatures, thermal conductivity increases before it reaches a maximum at the glass with chemically stoichiometric composition, and then decreases with increasing Ge content. We ascribed the threshold behavior of the thermal conductivity to the demixing of the structural units like GeSe 2 , As 2 Se 3 and Sb 2 Se 3 from the main glass network. The present study demonstrated that Raman scattering method is simple and easy to measure thermal conductivity of the material. Copyright © 2014 John Wiley & Sons, Ltd.