Emergence of coercivity in Sm(Fe0.8Co0.2)12 thin films via eutectic alloy grain boundary infiltration
Scripta Materialia Vol.164, Pages 140-144
Daisuke Ogawa, Xiandong Xu, Yukiko Takahashi, Tadakats Ohkubo, Satoshi Hirosawa, Kazuhiro Hono ( https://doi.org/10.1016/j.scriptamat.2019.02.001 )
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.
