SmCo $_{5}$ With Perpendicular Anisotropy Induced by a (211) Textured Ni$_{4}$ W Underlayer

In this work, we have successfully induced SmCo
₅
-(0001) texture using the Ni
₄
W-(211) underlayer. A tungsten (W) seed layer of 4 nm resulted in a nanocrystalline (211)-textured Ni
₄
W underlayer deposited at room temperature. Highly (0001)-textured SmCo
₅
was achieved after the sputtering deposition in the temperature range of 500-540°C. The crystallinity of the SmCo
₅
layer was reduced at higher deposition temperature (¿ 550°C), probably due to W diffusion. The nano-grained SmCo
₅
thin film deposited at 500°C shows an out-of-plane coercivty of 12.7 kOe with a large perpendicular magnetic anisotropy. The thickness of Ni
₄
W underlayer can be reduced to 13 nm without a significant change in the large perpendicular magnetic coercivity of the SmCo
₅
thin film.