Measurements of the Spin-Selective Magnetic Hysteresis Curve in Fe–3 wt.% Si Alloy Using Magnetic Compton Scattering

Abstract

In order to resolve the total magnetization of Fe–3 wt.% Si into spin and orbital contributions, we attempted to measure the spin-selective magnetic hysteresis curve using magnetic Compton scattering. The spin-selective magnetic hysteresis curve as a function of an applied magnetic field was determined by analyzing the integrated intensity of magnetic Compton spectra, which reflect only the momentum density of spin-polarized electrons in Fe–3 wt.% Si alloy. The orbital magnetic hysteresis curve was obtained by taking the difference between the vibrating sample magnetometer loop and the spin-selective magnetic hysteresis curve. The results show that the spin moment dominates the total magnetization in Fe–3 wt.% Si alloy and the $$ g $$ value in the alloy is estimated to be 2.34, which is larger than that in a pure Fe metal, which is 2.09.