Abstract
The anisotropy field of the ThMn12-type Sm(Fe0.8Co0.2)12 compound is high. However, there is an absence of reports on sufficiently high coercivity for anisotropic permanent magnet application. In this study, we employed the grain boundary diffusion process to anisotropic Sm(Fe0.8Co0.2)12 thin films. As-grown (001)-textured nanocrystalline film exhibit a coercivity of only 0.4 T. However, the grain boundary diffusion process via a Cu-Ga capping layer increases coercivity to 0.8 T. The coercivity exhibits relatively low temperature dependence when compared to that of Nd-Fe-B magnets.
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