@article{53c6dbe9e20c4a90b232d2b922a0ab41,
title = "Real-time observation of the thermally-induced phase transformation in GeTe and its thermal expansion properties",
abstract = "The GeTe-based system has long been considered as a promising candidate system for various functional applications; many of which are directly related to the polymorphic phase transformation in their crystalline forms. Consequently, the microstructure underlying their intriguing phase transition has been the subject of numerous studies. Here we provide real-time observation of the microstructural changes associated with the reversible pseudo-cubic (or rhombohedral) to cubic GeTe phase transition using high-voltage transmission electron microscopy (HV-TEM) operating at 1,250 kV and complementary high-temperature X-ray diffraction (XRD). As a result of the phase transition, the pseudo-cubic GeTe domain's configuration significantly changes from its original band-like to a spike-like morphology with a different orientation after a heating/cooling cycle. The coefficients of thermal expansion (CTE) properties as a function of temperature are also explored in relation to the GeTe phase transition.",
author = "Tran, {Xuan Quy} and Min Hong and Hiroshi Maeno and Youichirou Kawami and Takaaki Toriyama and Kevin Jack and Chen, {Zhi Gang} and Jin Zou and Syo Matsumura and Dargusch, {Matthew S.}",
note = "Funding Information: This research was conducted as part of the Progress 100 Project between the University of Queensland, Australia and Kyushu University, Japan. XQT and MD would like to thank Ms. Xin Fu Tan, Ms. Flora Somidin, Ms. Shiqian Liu and Prof. Kazuhiro Nogita for the TEM experimental support. The authors acknowledge the facilities, and the scientific and technical assistance at the Centre for Microscopy and Microanalysis, UQ, Australia, and the Ultramicroscopy Research Center, Kyushu University, Japan. The access to the latter facilities was supported by the Nanotechnology Platform project for advanced nanostructure characterisation. MD and XQT would also like to acknowledge the Queensland Centre for Advanced Materials Processing and Manufacturing (AMPAM) at the University of Queensland. Publisher Copyright: {\textcopyright} 2018 Acta Materialia Inc.",
year = "2019",
month = feb,
day = "15",
doi = "10.1016/j.actamat.2018.11.059",
language = "English",
volume = "165",
pages = "327--335",
journal = "Acta Materialia",
issn = "1359-6454",
publisher = "Elsevier Limited",
}