Measurements of the Spin-Selective Magnetic Hysteresis Curve in Fe–3 wt.% Si Alloy Using Magnetic Compton Scattering
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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.
KeywordsSpin-selective magnetic hysteresis curve magnetic Compton scattering grain-oriented Si steel ratio of spin to orbital moment energy losses
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This MCS experiment was performed with approval from the Japan Synchrotron Radiation Research Institute (Proposal no. 2017A1604). We would like to thank committee members of SPring-8 for providing beam time for the experiment.
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