Crystal growth within a phase change memory cell

Abu Sebastian (), Manuel Le Gallo and Daniel Krebs
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Abu Sebastian: IBM Research–Zurich
Manuel Le Gallo: IBM Research–Zurich
Daniel Krebs: IBM Research–Zurich

Nature Communications, 2014, vol. 5, issue 1, 1-9

Abstract: Abstract In spite of the prominent role played by phase change materials in information technology, a detailed understanding of the central property of such materials, namely the phase change mechanism, is still lacking mostly because of difficulties associated with experimental measurements. Here, we measure the crystal growth velocity of a phase change material at both the nanometre length and the nanosecond timescale using phase-change memory cells. The material is studied in the technologically relevant melt-quenched phase and directly in the environment in which the phase change material is going to be used in the application. We present a consistent description of the temperature dependence of the crystal growth velocity in the glass and the super-cooled liquid up to the melting temperature.

Date: 2014
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DOI: 10.1038/ncomms5314

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