F-D EXCHANGE INTERACTION IN THE RCO(2)-TYPE INTERMETALLIC COMPOUNDS WITH HEAVY RARE-EARTHS

Non-collinear magnetic structures were experimentally observed in the Al-substituted (R(t)Y(l-t))(Co, Pd)(2) compounds by magnetization meas urements in fields up to 27 T and molecular field coefficients of the f-d exchange interaction, lambda(fd) were determined. The f-d exchange integrals are calculated.