Magnetic structure of cubic Tb/sub 0. 3/Y/sub 0. 7/Ag

Tb/sub 0.3/Y/sub 0.7/Ag undergoes a magnetic phase transition at /approximately/36 K to an antiferromagnetic structure which neutron diffraction has shown to have two components. A commensurate antiferromagnetic component is similar to the ( 0) structure found in TbAg, but with a correlation range of only 42/angstrom/ at 4 K, while an incommensurate modulated component is like that found in HoAg, but with a finite correlation range of 290/angstrom/. 9 refs., 2 figs.