Abstract
Molten alloys of the system Ga–Tl have been investigated in dependence on temperature near the miscibility gap using small-angle neutron scattering. For the alloy of critical composition (40 at.% Tl) an increasing scattering intensity at low momentum transfer is observed, if the temperature is reduced to the critical temperature, T C. At T ∼ T C the increase reaches its maximum and decreases if the temperature is decreased. The data can be described by the Ornstein–Zernike formalism and a temperature-dependent correlation length is derived. For the other alloys, no temperature-dependent effects are observed in the covered range of momentum transfer.
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