The Debye-Waller factor approaching the glass-transition temperature in phosphate glasses
Artikel i vetenskaplig tidskrift, 2006

The temperature dependence of the mean square displacement, 〈u2〉, calculated by elastic neutron scattering for two phosphate glasses, (AgI)x(AgPO3)1-x with x = 0.3, 0.55, is analysed. The studied samples are probed in a wide range of temperatures going from a few tens of K up to the glass transition temperature and well into the undercooled liquid state. In the low temperature regime a solid like behaviour appears, showing a linear temperature dependence of the Debye-Waller factor, while around Tg the onset of a pronounced increase of 〈u2〉 is observed. The temperature dependence of the normalized elastic intensity and the drawn out Debye-Waller factor are fitted and analyzed by the theoretical previsions of Mode Coupling Theory finding a good agreement. © 2006 Elsevier B.V. All rights reserved.

Structural relaxation

Neutron diffraction/scattering

Glass transition

Phosphates

Författare

S. Caponi

Universita degli Studi di Trento

Sapienza, Università di Roma

A. Fontana

Universita degli Studi di Trento

Sapienza, Università di Roma

E. Fabiani

Institut Laue-Langevin

M. A. González

Institut Laue-Langevin

Lars Börjesson

Chalmers, Teknisk fysik, Kondenserade materiens fysik

Aleksandar Matic

Chalmers, Teknisk fysik, Kondenserade materiens fysik

C. Armellini

Istituto di Fotonica e Nanotecnologie (CNR-IFN)

Journal of Non-Crystalline Solids

0022-3093 (ISSN)

Vol. 352 42-49 SPEC. ISS. 4577-4582

Ämneskategorier

Keramteknik

Atom- och molekylfysik och optik

Den kondenserade materiens fysik

DOI

10.1016/j.jnoncrysol.2006.01.118

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Senast uppdaterat

2020-04-06