Journal Article

PreJuSER-51540

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Kinetics of decomposition in ionic solids: IV: Transition between nucleation and spinodal decomposition observed by time-resolved phonon spectroscopy

Elter, P. ; Eckold, G. ; Gibhardt, H. ; Schmidt, W.FZJ* ; Hoser, A.FZJ*

2005
IOP Publ. Bristol

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Please use a persistent id in citations: doi:10.1088/0953-8984/17/41/025

Abstract: Real-time inelastic neutron scattering has been used to study the kinetics of the demixing process in AgBr-NaBr mixed single crystals. The variation of transverse acoustic phonon spectra provides most direct information about the microscopic non-equilibrium behaviour. The phase separation is monitored by a well defined splitting of phonon peaks that reflects the different dynamical behaviours of the constituents. As a function of temperature, time evolution of the phonon spectra changes drastically, thus proving unambiguously that the demixing process is dominated by nucleation in the high-temperature regime and by concentration fluctuations at low temperatures.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Neutronenstreuung (IFF-INS)

Research Program(s):

1. Betrieb und Weiterentwicklung der Neutronenquelle FRJ- 2 (M05)
2. Kondensierte Materie (M02)

Appears in the scientific report 2005
Notes: Nachtrag

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