First Sharp Diffraction Peak features of the intermediate phase glasses and amorphous thin films in the non-stoichiometric (GeS4)x(AsS3)1-x system
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CIOBANU, Marina, GALCA, Aurelian Catalin, SAVA, Florinel, ZAKI, Mohamed Yassine, VELEA, Alin, TSIULYANU , Dumitru. First Sharp Diffraction Peak features of the intermediate phase glasses and amorphous thin films in the non-stoichiometric (GeS4)x(AsS3)1-x system. In: Thin Solid Films, 2023, vol. 773, p. 0. ISSN -. DOI: https://doi.org/10.1016/j.tsf.2023.139828
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Thin Solid Films
Volumul 773 / 2023 / ISSN - /ISSNe 0040-6090

First Sharp Diffraction Peak features of the intermediate phase glasses and amorphous thin films in the non-stoichiometric (GeS4)x(AsS3)1-x system

DOI:https://doi.org/10.1016/j.tsf.2023.139828

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Ciobanu Marina1, Galca Aurelian Catalin2, Sava Florinel2, Zaki Mohamed Yassine2, Velea Alin2, Tsiulyanu Dumitru1
 
1 Technical University of Moldova,
2 National Institute of Materials Physics Bucharest-Magurele
 
 
Disponibil în IBN: 18 aprilie 2023


Rezumat

Grazing incidence X-ray scattering (GIXRS) patterns of thin solid films based on non-stoichiometric chalcogenide glasses (ChG) from the pseudo - binary system (GeS4)x(AsS3)1-x were studied with a focus on the First Sharp Diffraction Peak (FSDP), assigned to the middle range order (MRO) of the glassy material. The films were grown using explosive thermal evaporation in vacuum (10−4 Pa) of pulverized ChG, prepared from previously synthesized bulk glasses, onto mono-crystalline silicon substrates. Scanning Electron Microscopy (SEM) and Energy-Dispersive X-ray (EDX) spectroscopy were used to examine the morphology and elemental composition of the films, which were found to have similar composition to the bulk glasses. However, it was revealed that the molecular structure of the grown amorphous films differs from that of the initial ChG bulk material, as indicated by changes in the composition-dependent position and width of the FSDP. Additionally, the intensities of the FSDP in the films were higher compared to those of the bulk samples, suggesting that the molecular-like structure of ChGs is more pronounced in the form of thin films grown from the vapor phase.

Cuvinte-cheie
Chalcogenides glasses, Intermediate phase, Medium range order, Thin films