부산대학교 도서관

We analyzed the magnetization reversal process of non-oriented electromagnetic steel sheets using the extended Landau free energy model (eX-GL). The model is a new analysis approach that can connect the macroscopic function and the microscopic structure beyond the hierarchy by using data science technique. It can treat grain boundaries and defects, which frequently occur in actual magnetic materials, furthermore it can visualize the inhibiting factors of magnetization reversal back to the original image. As a result, we could draw the experimental energy landscape of an electromagnetic steel sheet for the first time, and the magnetic domain walls that contribute to magnetization reversal was selectively visualized.