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Crystalline and amorphous structures of Ge-Sb-Te nanoparticles

Title
Crystalline and amorphous structures of Ge-Sb-Te nanoparticles
Authors
Park G.-S.Kwon J.-H.Kim M.Yoon H.R.Jo W.Kim T.K.Zuo J.-M.Khang Y.
Ewha Authors
조윌렴
SCOPUS Author ID
조윌렴scopus
Issue Date
2007
Journal Title
Journal of Applied Physics
ISSN
0021-8979JCR Link
Citation
vol. 102, no. 1
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We report effects of thermal annealing on the structures of Ge-Sb-Te (GST) nanoparticles synthesized by pulsed laser ablation deposition. The average diameter of the GST nanoparticles is an order of 10 nm. The as-prepared sample contains nanocrystals surrounded by an amorphous phase. Further crystallization occurs during annealing. The structures of the nanocrystals and amorphous phase were studied by electron diffraction and radial distribution function analyses. The results show that the nanoparticles annealed at 100 °C are crystalline, consisting of a mixture of face centered cubic (fcc) and hexagonal Ge2 Sb2 Te5 (dominant). In comparison, the nanoparticles annealed at 200 °C are mostly fcc. The surrounding amorphous phase has similar atomic arrangements to the previously reported amorphous GST thin films. © 2007 American Institute of Physics.
DOI
10.1063/1.2752550
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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