Angular dependence of metamagnetic transitions in DyAgSb2

Measurements;of the magnetization of DyAgSb2 reveal a complex system of up to 11 well-defined metamagnetic states for the field applied within the bas al plane. Measurements of the magnetization vs the angle the applied field makes with respect to the [110] axis show the Dy3+ moments are constrained to lie along one of the four [110] directions within the basal plane. From the angular dependence of the critical fields and plateau magnetizations, t he net distribution of the moments may be deduced for each state. Finally, the coupling constants are calculated within the framework of the "four-pos ition clock model." [S0163-1829(99)04302-7].