材料科学
无定形固体
扩散
化学物理
背景(考古学)
结晶
相(物质)
活化能
分析化学(期刊)
热力学
结晶学
物理化学
化学
有机化学
古生物学
物理
生物
作者
Qihuang Gong,Hong Jiang,Jacques Perrin-Toinin,Martin Peterlechner,Magali Putero,A. Portavoce,Sergiy V. Divinski,Gerhard Wilde
出处
期刊:Acta Materialia
[Elsevier]
日期:2023-09-01
卷期号:257: 119146-119146
被引量:1
标识
DOI:10.1016/j.actamat.2023.119146
摘要
Amorphous Ge2Sb2Te5 phase change material is considered as a prototype material for non-volatile memories due to the reversibility of the amorphous-to-crystalline transition on a nanosecond timescale. In this context, the kinetics of atomic self-diffusion has important bearings for the crystallization process and the switching behavior of phase change materials. It is thus important for applications as well as for the general understanding of the rapid and reversible switching behavior to understand atomic self-diffusion, especially in the amorphous phase. However, up to now, reliable data on the kinetics of atomic self-diffusion in amorphous phase change materials is almost non-existent. For this reason, Te tracer diffusion was measured using secondary ion mass spectroscopy and applying the highly enriched natural 122Te isotope. For the first time, Te self-diffusion coefficients in amorphous Ge2Sb2Te5 are experimentally measured and the activation energy of Te self-diffusion was determined as (1.43±0.08) eV.
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