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Simultaneous calorimetric and quick-EXAFS measurements to study the crystallization process in phase-change materials.
- Source :
-
Journal of synchrotron radiation [J Synchrotron Radiat] 2012 Sep; Vol. 19 (Pt 5), pp. 806-13. Date of Electronic Publication: 2012 Jul 07. - Publication Year :
- 2012
-
Abstract
- A Calvet-type differential scanning calorimeter has been implemented on a synchrotron beamline devoted to X-ray absorption spectroscopy. As a case study, the complex crystallization process in amorphous Ge(15)Sb(85) phase-change material is followed by simultaneous calorimetric and quick-EXAFS measurements. A first crystallization at 514(1) K is related to the crystallization of an Sb-rich phase accompanied by segregation of Ge atoms. Upon further heating, the as-formed amorphous Ge regions crystallize at 604(1) K. A quantitative analysis of the latent heat allows a Ge(11)Sb(89) stoichiometry to be proposed for the first crystallized phase.
Details
- Language :
- English
- ISSN :
- 1600-5775
- Volume :
- 19
- Issue :
- Pt 5
- Database :
- MEDLINE
- Journal :
- Journal of synchrotron radiation
- Publication Type :
- Academic Journal
- Accession number :
- 22898961
- Full Text :
- https://doi.org/10.1107/S090904951202612X