Abstract
In noble-metal alloys, diffuse peaks have often been observed at 1 1/2 {+-} {delta} 0 positions in diffuse neutron or X-ray scattering experiments. These peaks are connected with the presence of flat regions of the Fermi surface and are called 2k{sub F} peaks. They were found in the magnetic scattering of {und Cu}-Mn and {und Ag}-Mn as well as in the chemical, i.e. non-magnetic scattering of {und Cu}-Al, {und Cu}-Zn, {und Cu}-Pd, {und Ag}-Mn and {und Au}-Mn. The aim of the present study was to investigate the diffuse magnetic and chemical scattering of a Cu-17.2 at.% Mn single crystal. Although 2k{sub F} peaks are expected in the chemical scattering of {und Cu}-Mn as well, they were not found in earlier neutron scattering studies.
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