ISIS Neutron and Muon Source Data Journal

Viscosity anomaly and transient immiscibility in liquid Ga2Te3 promising for high-temperature memory applications

Abstract: Emerging brain-inspired computing needs phase-change materials (PCMs) of the next generation with lower energy consumption and wider temperature range. Ga2Te3 has higher melting and crystallization temperatures compared to flagship PCMs and simultaneously a low switching power and fast switching rate. Fast transformation rate in PCMs at nanosecond scale is directly related to a low viscosity in the liquid state. Ga2Te3 melt shows a highly unusual anomaly, a sudden viscosity increase just above the melting point. Our preliminary HE-XRD data suggest transient liquid-liquid immiscibility is the origin of this anomaly. A detailed response can be obtained using NIMROD experiment over a wide Q-range starting from 0.01 Å-1. EPSR modeling using large simulation boxes will complete the experiment providing deep insight into atomic structure at the local and mesoscopic scale.

Principal Investigator: Professor Eugene Bychkov
Experimenter: Dr Maria Bokova-Escorne
Experimenter: Dr Mohammad Kassem
Local Contact: Dr Tom Headen

DOI: 10.5286/ISIS.E.RB2220291

ISIS Experiment Number: RB2220291

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Professor Eugene Bychkov et al; (2022): Viscosity anomaly and transient immiscibility in liquid Ga2Te3 promising for high-temperature memory applications, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2220291

Data is released under the CC-BY-4.0 license.