We measured the local magnetic moments at grain boundaries in FeSi and FeSn alloys by electron energy loss spectroscopy with a transmission electron microscope and evaluated the relation between the grain boundary magnetism and grain boundary segregation in FeSi and FeSn alloys. We found that the local magnetic moments at the random boundaries in these alloys were remarkably reduced in comparison with those in pure Fe, whereas there was no considerable change at the 5 grain boundary and low-angle boundary. The variation of the local magnetic moments at impurity-segregated grain boundaries was explained by the competition between magnetovolume effect and hybridizations of electrons. It was found that the grain boundary character remarkably affects this hybridization. The decrease in the magnetic moments at random grain boundaries was more pronounced in the FeSn alloy than in the FeSi alloy.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering