Em. Levin et al., Real and imaginary components of the alternating current magnetic susceptibility of RAl2 (R=Gd, Dy, and Er) in the ferromagnetic region, J APPL PHYS, 90(12), 2001, pp. 6255-6262
The real (chi'(ac)) and imaginary (chi " (ac)) components of the ac magneti
c susceptibility of the polycrystalline GdAl2, DyAl2, and ErAl2 have been m
easured as functions of temperature, ac and bias dc magnetic field amplitud
e, and ac magnetic field frequency. Both chi'(ac) and chi " (ac) of the fer
romagnetic DyAl2 and ErAl2 are strongly dependent on the ac magnetic field
parameters, especially when compared with those of the ferromagnetic GdAl2.
The observed behavior of the ac magnetic susceptibility is determined main
ly by the domain dynamics, rather than by a change of the exchange interact
ions below Curie temperature. (C) 2001 American Institute of Physics.