Ultra-fast calorimetry study of Ge2Sb2Te5 crystallization between dielectric layers

Orava, Jiří; Greer, A.L.; Gholipour, Behrad; Hewak, Daniel W.; Smith, Christopher

doi:10.1063/1.4748881

Cited by 44 publications

(28 citation statements)

References 35 publications

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“…This transition from super-cooled liquid to the glass state occurring at very high temperatures could be due to the very fast quench rates in our experiment. Other aspects, such as being in a confined cell and the subsequent impact of stress, and other interfacial effects could also influence this behaviour 21,23 .…”

Section: Resultsmentioning

confidence: 99%

“…This also enables measurement on the melt-quenched phase directly in the environment in which the material is going to be used. Note that the interface and stress conditions will be substantially different in this case, and this could also influence the crystallization dynamics significantly [21][22][23] . In a PCM cell, a layer of crystalline phase change material is sandwiched between two electrodes.…”

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confidence: 99%

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Crystal growth within a phase change memory cell

2014

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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.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Crystal growth within a phase change memory cell

2014

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“…Fast scanning calorimeter (FSC) [24,25] uses a twin-chip sensor designed for the Mettler Toledo Flash 1 DSC [26,27]. The construction of the calorimeter is described in [24,28,29].…”

Section: Methodsmentioning

confidence: 99%

Enthalpy relaxation of selenium observed by fast scanning calorimetry

et al. 2015

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“…Heating and cooling with several 10 4 K s À1 and 10 3 K s À1 , respectively, can be realized with a recently available commercial instrument (Mettler Toledo Flash DSC 1 [15]). This instrument has generally been used to study polymers [15] and phase-change materials [16,17], but in recent studies it has also been successfully applied to a Au 49 Ag 5.5 Pd 2.3 Cu 26.9 Si 16.3 BMG [18]. Aubased BMGs are ideal candidates for investigation via FDSC because here in situ exploration of the glass formation and crystallization behavior in the whole supercooled liquid region is possible [18].…”

Section: Introductionmentioning

confidence: 98%