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[Ni-Fe/Si] Double Seedlayer With Low Surface Energy for Fe-Co-B Soft Magnetic Underlayer With High<tex>$H_rm k$</tex>for Perpendicular Magnetic Recording Media

2004; IEEE Magnetics Society; Volume: 40; Issue: 4 Linguagem: Inglês

10.1109/tmag.2004.832266

1941-0069

Sunga Kong, Takeshi Okamoto, Shigeki Nakagawa, Sunga Kong, Takeshi Okamoto, Shigeki Nakagawa,

Adhesion, Friction, and Surface Interactions

Fe-Co-B layers deposited on Ni-Fe seedlayer exhibited a high in-plane anisotropy field H/sub k/ of 280 Oe caused by inclined incident angle of sputtered particles. Ni-Fe/Si double seedlayer with low surface energy led to increase the effect of inclined incident angle. For more increase of the H/sub k/ in Fe-Co-B layer, a control of surface energy in Ni-Fe seedlayer was investigated. An improvement of closest packing plane (111) crystallites orientation led to reduce the surface energy in Ni-Fe layer. The adhesive force of Ni-Fe(10 nm) deposited on Si(2 nm) layer with (111) crystallites orientation exhibited 475 nN corresponding to about 65% of that of Ni-Fe(10 nm) single layer with random orientation. [Ni-Fe/Si] double seedlayer with lower adhesive force was effective in attaining a small crystallites size as well as finer grains in Fe-Co-B layer. Moreover, the H/sub k/ increased up to 380 Oe in Fe-Co-B layer on [Ni-Fe/Si] double seedlayer with lower adhesive force.