%0 Journal Article
%A Elter, P.
%A Eckold, G.
%A Gibhardt, H.
%A Schmidt, W.
%A Hoser, A.
%T Kinetics of decomposition in ionic solids: IV: Transition between nucleation and spinodal decomposition observed by time-resolved phonon spectroscopy
%J Journal of physics / Condensed matter
%V 17
%@ 0953-8984
%C Bristol
%I IOP Publ.
%M PreJuSER-51540
%P 6559 - 6573
%D 2005
%Z Record converted from VDB: 12.11.2012
%X 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.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000233589400030
%R 10.1088/0953-8984/17/41/025
%U https://juser.fz-juelich.de/record/51540