FINITE-TEMPERATURE THEORY OF AMORPHOUS METALLIC MAGNETISM WITH VECTORSPINS

A finite temperature theory of amorphous metallic magnetism which take s into account vector spins is developed to study noncollinear magneti sm in amorphous Fe. This theory is based on the functional integral me thod for thermal spin fluctuations and the distribution function metho d for local magnetic moments with structural disorder. The numerical r esults at 35 K show up the existence of an isotropic spin-glass in amo rphous Fe. When the d electron number n(d) is increased, the spin-glas s changes to a noncollinear ferromagnet at n(d) = 7.40 and finally to a collinear ferromagnet beyond n(d) = 7.47.