Magnetic structure of CeCu6-xAux

We report neutron-diffraction results on CeCu6-xAux single crystals with x = 0.2, 0.3, 0.4 and 0.5. All samples show incommensurate magnetic order at T-N = 0.2, 0.48, 0.77 and 1.07 K, respectively. The degree of the incommensurability, however, changes radically between x = 0.5 and 0.4. While the incommensurability in the x = 0.5 sample is only in one direction, namely in the sigma*-direction, the x = 0.4, 0.3 and 0.2 samples exhibit magnetic order involving incommensurability both in a* and c*-direction. (C) 1998 Elsevier Science B.V. All rights reserved.