Pulsed laser deposited GeTe-rich GeTe-Sb2Te3 thin films
NAZABAL, Virginie
Institut des Sciences Chimiques de Rennes [ISCR]
Department of Graphic Arts and Photophysics [University of Pardubice]
< Réduire
Institut des Sciences Chimiques de Rennes [ISCR]
Department of Graphic Arts and Photophysics [University of Pardubice]
Langue
en
Article de revue
Ce document a été publié dans
Scientific Reports. 2016, vol. 6, n° 1, p. 26552 (10 p.)
Nature Publishing Group
Résumé en anglais
Pulsed laser deposition technique was used for the fabrication of Ge-Te rich GeTe-Sb2Te3 (Ge6Sb2Te9, Ge8Sb2Te11, Ge10Sb2Te13 and Ge12Sb2Te15) amorphous thin films. To evaluate the influence of GeTe content in the deposited ...Lire la suite >
Pulsed laser deposition technique was used for the fabrication of Ge-Te rich GeTe-Sb2Te3 (Ge6Sb2Te9, Ge8Sb2Te11, Ge10Sb2Te13 and Ge12Sb2Te15) amorphous thin films. To evaluate the influence of GeTe content in the deposited films on physico-chemical properties of the GST materials, scanning electron microscopy with energy-dispersive X-ray analysis, X-ray diffraction and reflectometry, atomic force microscopy, Raman scattering spectroscopy, optical reflectivity and sheet resistance temperature dependences as well as variable angle spectroscopic ellipsometry measurements were used to characterize as-deposited (amorphous) and annealed (crystalline) layers. Upon crystallization, optical functions and electrical resistance of the films change drastically, leading to large optical and electrical contrast between amorphous and crystalline phases. Large changes of optical/electrical properties are accompanied by the variations of thickness, density and roughness of the films due to crystallization. Reflectivity contrast as high as ~0.21 at 405 nm was calculated for Ge8Sb2Te11, Ge10Sb2Te13 and Ge12Sb2Te15 layers.< Réduire
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