Short-range order in α-brass
作者： B. Schönfeld , G. Kostorz , W. Bührer , L. Reinhard
关键词: Intensity (heat transfer) 、 Order (ring theory) 、 Crystal structure 、 Elastic scattering 、 Atomic physics 、 Single crystal 、 Physics 、 Neutron scattering 、 Condensed matter physics 、 Fermi surface 、 Fermi gas
摘要: A quenched equilibrium state of a $^{65}31$.1 at. % Zn single crystal was investigated by elastic diffuse neutron scattering. The short-range order intensity showed maxima that could be related to the flat portions Fermi surface perpendicular 〈110〉 directions. Effective pair potentials ${V}_{\mathrm{lmn}}$ were determined from 71 parameters ${\ensuremath{\alpha}}_{\mathrm{lmn}}$ obtained fit intensity. Furthermore, 40 linear displacement also extracted. dominant ${V}_{110}$ \ensuremath{\sim}18 meV obtained. Based on Monte Carlo simulation, an ordered low-temperature phase ${\mathrm{Cu}}_{3}$Zn with ${\mathrm{DO}}_{23}$ structure and critical temperature \ensuremath{\sim}330 K is suggested.
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