  We report on extensive elastic neutron scattering to determine the wave
vector of the magnetic order in CeCu_{6-x}Au_x single crystals for x > 0.1. For
all values of x investigated (0.2, 0.3, 0.5, 1.0) we find long-range
incommensurate antiferromagnetic order with an ordering vector Q $\approx$
(0.625 0 0.275) for x=0.2, nearly unchanged for x=0.3, and Q $\approx$ (0.59 0
0) for x=0.5, staying roughly the same for x=1.0. In addition, short-range
correlations are observed at x=0.2, reminiscent of those found previously for
x=0.1. The ordered magnetic moment is found to increase rapidly for small x,
and more slowly for the larger x values. The increase of the specific-heat
anomaly at the ordering temperature with x is in qualitative accord with this
behavior. Finally, data of the electrical resistivity for current flow along
the three crystallographic directions are presented, showing a clear signature
of the magnetic order. A theoretical interpretation of the interplay of
magnetic order and transport in terms of (i) the partial suppression of the
Kondo effect by the staggered magnetization and (ii) the anisotropic band
structure induced by the staggered field is shown to account well for the data,
provided the ordering vector Q is close to 2 k_F, where k_F is a typical Fermi
momentum.
