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

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4 Author(s)
Zhang, L.N. ; Dept. of Mater. Sci. & Eng., Nat. Univ. of Singapore, Singapore, Singapore ; Hu, J.F. ; Chen, J.S. ; Ding, J.

In this work, we have successfully induced SmCo5-(0001) texture using the Ni4W-(211) underlayer. A tungsten (W) seed layer of 4 nm resulted in a nanocrystalline (211)-textured Ni4W underlayer deposited at room temperature. Highly (0001)-textured SmCo5 was achieved after the sputtering deposition in the temperature range of 500-540°C. The crystallinity of the SmCo5 layer was reduced at higher deposition temperature (¿ 550°C), probably due to W diffusion. The nano-grained SmCo5 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 Ni4 W underlayer can be reduced to 13 nm without a significant change in the large perpendicular magnetic coercivity of the SmCo5 thin film.

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Magnetics, IEEE Transactions on  (Volume:46 ,  Issue: 6 )