Crystallization mechanism and kinetics of Cr2Ge2Te6 phase change material

S. Hatayama; Y. Sutou; D. Ando; J. Koike

doi:10.1557/mrc.2018.176

Crystallization mechanism and kinetics of Cr₂Ge₂Te₆ phase change material

S. Hatayama, Y. Sutou, D. Ando, J. Koike

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13 Citations (Scopus)

Abstract

The crystallization mechanism and kinetics of Cr₂Ge₂Te₆ (CrGT) films were investigated by differential scanning calorimetry. The average Avrami exponent (na) analysis indicated that CrGT exhibits a growth-dominant crystallization in the range of heating rate (β) of 10-50°C/min. In comparison, Ge₂Sb₂Te₅ (GST) showed a nucleation-dominant crystallization. The na of CrGT was about 3, and was majorly independent of β. The n_a of GST decreased with an increasing β, which asymptotically approached a value of around 3. The kinetic constant of CrGT was evaluated to be almost the same with that of GST, indicating that CrGT undergoes fast crystallization.

Original language	English
Pages (from-to)	1167-1172
Number of pages	6
Journal	MRS Communications
Volume	8
Issue number	3
DOIs	https://doi.org/10.1557/mrc.2018.176
Publication status	Published - 2018 Sept 1

ASJC Scopus subject areas

Materials Science(all)

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title = "Crystallization mechanism and kinetics of Cr2Ge2Te6 phase change material",

abstract = "The crystallization mechanism and kinetics of Cr2Ge2Te6 (CrGT) films were investigated by differential scanning calorimetry. The average Avrami exponent (na) analysis indicated that CrGT exhibits a growth-dominant crystallization in the range of heating rate (β) of 10-50°C/min. In comparison, Ge2Sb2Te5 (GST) showed a nucleation-dominant crystallization. The na of CrGT was about 3, and was majorly independent of β. The na of GST decreased with an increasing β, which asymptotically approached a value of around 3. The kinetic constant of CrGT was evaluated to be almost the same with that of GST, indicating that CrGT undergoes fast crystallization.",

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AU - Hatayama, S.

AU - Sutou, Y.

AU - Ando, D.

AU - Koike, J.

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N2 - The crystallization mechanism and kinetics of Cr2Ge2Te6 (CrGT) films were investigated by differential scanning calorimetry. The average Avrami exponent (na) analysis indicated that CrGT exhibits a growth-dominant crystallization in the range of heating rate (β) of 10-50°C/min. In comparison, Ge2Sb2Te5 (GST) showed a nucleation-dominant crystallization. The na of CrGT was about 3, and was majorly independent of β. The na of GST decreased with an increasing β, which asymptotically approached a value of around 3. The kinetic constant of CrGT was evaluated to be almost the same with that of GST, indicating that CrGT undergoes fast crystallization.

AB - The crystallization mechanism and kinetics of Cr2Ge2Te6 (CrGT) films were investigated by differential scanning calorimetry. The average Avrami exponent (na) analysis indicated that CrGT exhibits a growth-dominant crystallization in the range of heating rate (β) of 10-50°C/min. In comparison, Ge2Sb2Te5 (GST) showed a nucleation-dominant crystallization. The na of CrGT was about 3, and was majorly independent of β. The na of GST decreased with an increasing β, which asymptotically approached a value of around 3. The kinetic constant of CrGT was evaluated to be almost the same with that of GST, indicating that CrGT undergoes fast crystallization.

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Crystallization mechanism and kinetics of Cr₂Ge₂Te₆ phase change material

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