Showing papers by "Seong-Cho Yu published in 1992"
TL;DR: In this article, the effect of annealing temperatures on the spin wave excitations for the nanocrystalline Fe/sub 68.5/B/sub 9/ alloy, observed from the low-temperature magnetization curves and the spectroscopic splitting g-factors, was investigated.
Abstract: The authors report on the effect of annealing temperatures on the spin wave excitations for the nanocrystalline Fe/sub 68.5/Co/sub 5/Nb/sub 3/CuSi/sub 13.5/B/sub 9/ alloy, observed from the low-temperature magnetization curves and the spectroscopic splitting g-factors. The temperature dependence of magnetization was measured with a vibrating sample magnetometer and spectroscopic splitting g-values were estimated from ferromagnetic resonance experiments. Coercive force, initial permeability, and AC power loss of the annealed alloys have been studied systematically. The thermomagnetization curve 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 and the range of the exchange interaction within the annealing condition were calculated. The source of the excellent soft magnetic properties in the alloy with ultrafine grains may be the softening of the spin wave, in addition to the grain size effect. >
13 citations
13 Apr 1992