X-RAY MAGNETIC SCATTERING FROM NONMAGNETIC LU IN A DYLU ALLOY

We have detected the presence of a spin-density wave (SDW) induced in the conduction band of a Dy0.60Lu0.40 thin film alloy that orders as a c-axis helimagnet. By tuning the incident x-ray energy to the L(III) edges, we exploit the species sensitivity of x-ray resonant magnetic s cattering to isolate the contribution of each element individually. As Lu has a filled 4f shell, magnetic intensity observed at that resonan ce reflects the polarization of the 5d orbitals in the helical SDW. Th e SDW amplitude is of order 0.2 mu(B)/atom. Complementary neutron data show that the temperature dependence of the induced Lu intensity and its wave vector follow that of the total moment.