Investigation of the structural transformation behavior of Ge2Sb2Te5 thin films using high resolution electron microscopy
Structural transformation of the Ge2Sb2Te5 was investigated by a high resolution transmission electron microscopy (HRTEM). It was found that Ge atoms undergo umbrella-flip motion from a tetrahedral site into an octahedral site in transforming from the amorphous to the metastable phase of Ge2Sb2Te5. The presence of a twin boundary between fcc and hexagonal structured Ge2Sb2Te5 was also confirmed through the HRTEM observations. These results support the umbrella-flip model proposed by Kolobov [Nat. Mater. 3, 703 (2004)] and the epitaxial growth model proposed by Park [Appl. Surf. Sci. 256, 8102 (2006)]. (c) 2007 American Institute of Physics.
- Publisher
- AMER INST PHYSICS
- Issue Date
- 2007-09
- Language
- English
- Article Type
- Article
- Keywords
CHANGE OPTICAL DISK; CRYSTAL-STRUCTURE; PHASE; MEMORY
- Citation
APPLIED PHYSICS LETTERS, v.91, pp.1662 - 1665
- ISSN
- 0003-6951
- Appears in Collection
- MS-Journal Papers(저널논문)
- Files in This Item
- 000249322900020.pdf(369.38 kB)Download
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