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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Momand, Jamo
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (22/22 displayed)
- 2022Ultrathin, sputter-deposited, amorphous alloy films of ruthenium and molybdenumcitations
- 2022Ultrathin, sputter-deposited, amorphous alloy films of ruthenium and molybdenumcitations
- 2022Phase Separation in Ge-Rich GeSbTe at Different Length Scales: Melt-Quenched Bulk versus Annealed Thin Filmscitations
- 2022Nanostructure and thermal power of highly-textured and single-crystal-like Bi2Te3 thin filmscitations
- 2022Nanostructure and thermal power of highly-textured and single-crystal-like Bi2Te3 thin filmscitations
- 2021Polytriphenylamine composites for energy storage electrodes:Effect of pendant vs. backbone polymer architecture of the electroactive groupcitations
- 2021Pulsed laser deposited stoichiometric GaSb films for optoelectronic and phase change memory applicationscitations
- 2021Pulsed laser deposited stoichiometric GaSb films for optoelectronic and phase change memory applicationscitations
- 2021Controlling phase separation in thermoelectric Pb1-xGexTe to minimize thermal conductivitycitations
- 2021Polytriphenylamine composites for energy storage electrodescitations
- 2020Single-Source, Solvent-Free, Room Temperature Deposition of Black γ-CsSnI 3 Filmscitations
- 2020Differences in Sb2Te3 growth by pulsed laser and sputter depositioncitations
- 2020Single‐Source, Solvent‐Free, Room Temperature Deposition of Black γ‐CsSnI3 Filmscitations
- 2019Chemical Solution Deposition of Ordered 2D Arrays of Room-Temperature Ferrimagnetic Cobalt Ferrite Nanodotscitations
- 2019High Resolution Imaging of Chalcogenide Superlattices for Data Storage Applicationscitations
- 2019Low temperature epitaxy of tungsten-telluride heterostructure filmscitations
- 2019High Resolution Imaging of Chalcogenide Superlattices for Data Storage Applications:Progress and Prospectscitations
- 2018Tailoring the epitaxy of Sb2Te3 and GeTe thin films using surface passivationcitations
- 2017Formation of resonant bonding during growth of ultrathin GeTe filmscitations
- 2016Crystallization Kinetics of Supercooled Liquid Ge-Sb Based on Ultrafast Calorimetrycitations
- 2016Ordered Peierls distortion prevented at growth onset of GeTe ultra-thin filmscitations
- 2014Reversible amorphous-crystalline phase changes in a wide range of Se1-xTex alloys studied using ultrafast differential scanning calorimetrycitations
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article
Reversible amorphous-crystalline phase changes in a wide range of Se1-xTex alloys studied using ultrafast differential scanning calorimetry
Abstract
The reversible amorphous-crystalline phase change in a chalcogenide material, specifically the Se1-xTex alloy, has been investigated for the first time using ultrafast differential scanning calorimetry. Heating rates and cooling rates up to 5000 K/s were used. Repeated reversible amorphous-crystalline phase switching was achieved by consecutively melting, melt-quenching, and recrystallizing upon heating. Using a well-conditioned method, the composition of a single sample was allowed to shift slowly from 15 at. % Te to 60 at. % Te, eliminating sample-to-sample variability from the measurements. Using Energy Dispersive X-ray Spectroscopy composition analysis, the onset of melting for different Te-concentrations was confirmed to coincide with the literature solidus line, validating the use of the onset of melting T-m as a composition indicator. The glass transition T-g and crystallization temperature T-c could be determined accurately, allowing the construction of extended phase diagrams. It was found that T-m and T-g increase (but T-g/T-m decrease slightly) with increasing Te-concentration. Contrarily, the T-c decreases substantially, indicating that the amorphous phase becomes progressively unfavorable. This coincides well with the observation that the critical quench rate to prevent crystallization increases about three orders of magnitude with increasing Te concentration. Due to the employment of a large range of heating rates, non-Arrhenius behavior was detected, indicating that the undercooled liquid SeTe is a fragile liquid. The activation energy of crystallization was found to increase 0.5-0.6 eV when the Te concentration increases from 15 to 30 at. % Te, but it ceases to increase when approaching 50 at. % Te. (C) 2014 AIP Publishing LLC.