MAGNETIC-PROPERTIES OF DY-LU ALLOYS

Although many binary heavy rare-earth alloy systems have been studied extensively, there has been little work reported on the Dy-Lu system. The properties of single-crystal DyxLu1-x films grown by molecular bea m epitaxy are reported. SQUID magnetometer and neutron diffraction mea surements on samples with x=0.4, 0.5, and 0.6 show that the samples or der helimagnetically with Neel temperatures of T(N)=90, 105, and 120 K , respectively. The helical turn angle was mapped as a function of tem perature for each of the three alloys. Magnetic x-ray scattering, the first in an alloy, was observed at the (002)+/- positions at 15 and 60 K in the x=0.4 sample using resonant exchange scattering of synchrotr on radiation at the Dy L(III) edge.