http://www.cnr.it/ontology/cnr/individuo/prodotto/ID36053
Phase change mechanisms in Ge2Sb2Te5 (Articolo in rivista)
- Type
- Label
- Phase change mechanisms in Ge2Sb2Te5 (Articolo in rivista) (literal)
- Anno
- 2007-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1063/1.2752111 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Privitera S.; Lombardo S.; Bongiorno C.; Rimini E.; Pirovano A. (literal)
- Pagina inizio
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
- http://jap.aip.org/resource/1/japiau/v102/i1/p013516_s1 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
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- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- STMicroelect, I-95121 Catania, Italy;
CNR-IMM, I-95121 Catania, Italy;
STMicroelect, FTM Adv R & D, I-20064 Milan, Italy;
Univ Catania, Dipartimento Fis & Astronomia, I-95123 Catania, Italy (literal)
- Titolo
- Phase change mechanisms in Ge2Sb2Te5 (literal)
- Abstract
- We study the phase transition from amorphous to face-centered-cubic (fcc) polycrystalline Ge2Sb2Te5 thin films. The transformation has the peculiar characteristic, still not well understood, of coexisting high transition rates at low annealing temperature (with grain growth velocities of the order of 1 nm/min at 140 degrees C) and large activation energies (about 2-2.5 eV). In this work all kinetic parameters governing the transition have been determined by in situ transmission electron microscopy analysis. They are thermally activated and consistently show large anomalies in the preexponential terms of transient and steady-state nucleation rates and grain growth rate. A possible explanation for these observations is described, based on a recently proposed atomic structure of the fcc Ge2Sb2Te5, characterized by a high level of disorder and distortion at the short range. (literal)
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- Autore CNR
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