Scaling of the field effect on the magnetic relaxation about the Curie point of EuS

Above Tc and also in the homogeneous ferromagnetic phase below TC, susceptibility measurements between 1.6 MHz and 1.5 GHz in parallel static fields up to 0.5 kOe reveal Lorentzian shapes in {ω}. In the dipolar critical region on both sides of TC, the field and temperature effects on the resulting kinetic coefficient of the magnetization scale with the isothermal susceptibility. We discuss this feature phenomenologically based on a recent mode-coupling result valid in the limit H=0 and T>TC.