Approaching the Glass Transition Temperature of GeTe by Crystallizing Ge15Te85,Physica Status Solidi-Rapid Research Letters

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Approaching the Glass Transition Temperature of GeTe by Crystallizing Ge15Te85
Physica Status Solidi-Rapid Research Letters ( IF 2.5 ) Pub Date : 2020-11-13 , DOI: 10.1002/pssr.202000478
Julian Pries ₁ , Yuan Yu ₁ , Peter Kerres ₁ , Maria Häser ₁ , Simon Steinberg ₂ , Fabian Gladisch ₂ , Shuai Wei ₃ , Pierre Lucas ₄ , Matthias Wuttig ₁

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Like many phase‐change materials, GeTe crystallizes upon heating at a conventional rate before the calorimetric glass transition is reached. This has so far prevented an unambiguous determination of its glass transition temperature T_g. Herein, a new approach is realized to estimate the glass transition temperature T_g for GeTe through progressive crystallization of Ge₁₅Te₈₅. Selective crystallization of pure tellurium during sub‐T_g annealing leads to a gradual change in the composition of the amorphous surrounding toward that of GeTe. This gives rise to a new endotherm whose onset temperature gradually approaches the T_g of GeTe.

中文翻译：

通过结晶Ge15Te85接近GeTe的玻璃化转变温度

像许多相变材料一样，GeTe在达到量热玻璃化转变之前以常规速率加热时会结晶。到目前为止，这已经避免了对其玻璃化转变温度T _g的明确确定。在本文中，实现了一种新的方法来通过逐步结晶Ge ₁₅ Te ₈₅来估计GeTe的玻璃化转变温度T _g。子期间纯碲的选择性结晶Ť_克退火导致在朝向的GeTe的周围无定形的组合物中的逐渐变化。这产生了新的吸热，其起始温度逐渐接近GeTe的T _g。

更新日期：2020-11-13

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