@article{6e0cd6ff99ee48e1ad8368b19c09a7e5,
title = "Approaching the Glass Transition Temperature of GeTe by Crystallizing Ge15Te85",
abstract = "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 Tg. Herein, a new approach is realized to estimate the glass transition temperature Tg for GeTe through progressive crystallization of Ge15Te85. Selective crystallization of pure tellurium during sub-Tg 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 Tg of GeTe.",
keywords = "crystallization kinetics, glass transition, metavalent bonding, phase-change materials, undercooled liquids",
author = "Julian Pries and Yuan Yu and Peter Kerres and Maria H{\"a}ser and Simon Steinberg and Fabian Gladisch and Shuai Wei and Pierre Lucas and Matthias Wuttig",
note = "Funding Information: The authors acknowledge funding from the Deutsche Forschungsgemeinschaft (DFG) via the collaborative research center Nanoswitches (SFB 917) and in part by the Federal Ministry of Education and Research (BMBF, Germany) in the project NEUROTEC (16ES1133 K). P.L. acknowledges funding from NSF‐DMR grant No. 1832817. S.W. acknowledges the support of the DFG grant No. 422219280. S.S. acknowledges funding from Fonds der Chemischen Industrie. Support with XRD measurements by Tobias Strop is gratefully appreciated as well as the supervision of the APT setup by Oana Cojocaru‐Mir{\'e}din and by Svitlana Taranenko. Jean‐Marc Joubert is gratefully acknowledged for conducting and providing us with the CALPHAD calculations of the stable and metastable phase diagrams and all helpful discussions and comments. The authors thank the anonymous reviewers for critically reading the manuscript and suggesting improvements concerning the stoichiometry of the glassy phase, whose is determined in this work. Open access funding enabled and organized by Projekt DEAL. T g Funding Information: The authors acknowledge funding from the Deutsche Forschungsgemeinschaft (DFG) via the collaborative research center Nanoswitches (SFB 917) and in part by the Federal Ministry of Education and Research (BMBF, Germany) in the project NEUROTEC (16ES1133 K). P.L. acknowledges funding from NSF-DMR grant No. 1832817. S.W. acknowledges the support of the DFG grant No. 422219280. S.S. acknowledges funding from Fonds der Chemischen Industrie. Support with XRD measurements by Tobias Strop is gratefully appreciated as well as the supervision of the APT setup by Oana Cojocaru-Mir{\'e}din and by Svitlana Taranenko. Jean-Marc Joubert is gratefully acknowledged for conducting and providing us with the CALPHAD calculations of the stable and metastable phase diagrams and all helpful discussions and comments. The authors thank the anonymous reviewers for critically reading the manuscript and suggesting improvements concerning the stoichiometry of the glassy phase, whose Tg is determined in this work. Open access funding enabled and organized by Projekt DEAL. Publisher Copyright: {\textcopyright} 2020 The Authors. Physica Status Solidi (RRL) - Rapid Research Letters published by Wiley-VCH GmbH",
year = "2021",
month = mar,
doi = "10.1002/pssr.202000478",
language = "English (US)",
volume = "15",
journal = "Physica Status Solidi - Rapid Research Letters",
issn = "1862-6254",
publisher = "Wiley-VCH Verlag",
number = "3",
}