The approach to saturation magnetization of nanocrystalline Fe90Zr7B3 alloy

Abstract

The approach to the saturation magnetization of a nanocrystalline Fe90Zr7B3 alloy has been studied by means of differential magnetic susceptometry. The influence of the microstructure of the alloy on the approach to saturation magnetization has been studied. It has been found that for the optimum heat-treated sample (heated at 923 K for 0.25 h), which had an average grain size of 12 nm and a coercivity, Hc = 6.4 A m-1, the approach to saturation magnetization can be expressed using the law of approach to saturation magnetization, Χ = aMsH-2 + 2bMsH-3 + c/2(H-1/2) (where Χ is the differential magnetic susceptibility, Ms is the saturation magnetization, H is the magnetic field, and a, b and c ..