Some fundamental aspects of amorphous magnetism

Amorphous ferromagnets, typically (Fe-Ni)
80
P
10
B
10
, Ni-Y, Ni-P and Fe-Ge, are discussed on the basis of the intererant electron model. The analogy is drawn with ferromagnetic metals above the Curie and melting points. Invar anomalies are shown to be natural consequences of this model. The consequences of the Landau-Ginzburg model of magnetic order are discussed.