Low Temperature Magnetizaiton In Nanocrystalline Fe/sub 88/ Zr/sub 7/ B/sub 4/ Cu/sub 1/ Alloy

Abstract

The authors report on the effect of annealing temperatures on the spin wave excitations for the nanocrystalline Fe/sub 88/Zr/sub 7/B/sub 4/Cu/sub 1/ alloy, observed from the low-temperature magnetization curve and the spectroscopic splitting g factor. The thermomagnetization curve at low temperature is found to obey the Bloch law, M/sub s/(T)=M/sub s/(0)(1-BT/sup 3/2/-CT/sup 5/2/). From these experimental results, spin wave stiffness constants within the annealing condition are calculated. The effective permeability, coercive force, saturation magnetization (B/sub 10/), magnetostriction and magnetic anisotropy of the annealed alloys are studied systematically. >