Complex structural rearrangements in As-Se glasses

R Golovchak; J Oelgoetz; M Vlcek; A Esposito; A Saiter; J-M Saiter; H Jain

doi:10.1063/1.4863561

Complex structural rearrangements in As-Se glasses

J Chem Phys. 2014 Feb 7;140(5):054505. doi: 10.1063/1.4863561.

Authors

R Golovchak¹, J Oelgoetz¹, M Vlcek², A Esposito³, A Saiter³, J-M Saiter³, H Jain⁴

Affiliations

¹ Department of Physics and Astronomy, Austin Peay State University, Clarksville, Tennessee 37044, USA.
² Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, 532 10 Pardubice, Czech Republic.
³ AMME-LECAP International Laboratory, EA4528, Institut des Matériaux de Rouen, Université de Rouen, Faculté des Sciences, Avenue de l'Université BP 12, 76801 Saint Etienne du Rouvray, France.
⁴ Department of Materials Science and Engineering, Lehigh University, 5 East Packer Avenue, Bethlehem, Pennsylvania 18015-3195, USA.

PMID: 24511950
DOI: 10.1063/1.4863561

Abstract

Structural relaxation of As-Se glasses through the glass-to-supercooled liquid transition interval is studied with temperature-modulated differential scanning calorimetry. It is shown that connectivity of glass network and long-term physical ageing change not only the full width at half maximum of the out-of-phase component of complex heat capacity, which is conventionally used for analysis, but also its asymmetry value. The latter is shown to carry very important information on the dynamic heterogeneity in glasses. Raman spectroscopy is used as complementary technique to reveal possible structural rearrangements in the investigated glass network.