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Article Dans Une Revue Journal of Synchrotron Radiation Année : 2012

Simultaneous calorimetric and quick-EXAFS measurements to study the crystallization process in phase-change materials.

Résumé

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.

Dates et versions

hal-00814073 , version 1 (16-04-2013)

Identifiants

Citer

Peter Zalden, Giuliana Aquilanti, Carmelo Prestipino, Olivier Mathon, Bérangère André, et al.. Simultaneous calorimetric and quick-EXAFS measurements to study the crystallization process in phase-change materials.. Journal of Synchrotron Radiation, 2012, 19 (Pt 5), pp.806-13. ⟨10.1107/S090904951202612X⟩. ⟨hal-00814073⟩
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