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Reducing average grain and domain size in high-coercivity Co/Pd perpendicular magnetic recording media through seedlayer engineering

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2 Author(s)
Speetzen, N.J. ; Electrical and Computer Engineering, University of Minnesota, Minnesota 55455 ; Stadler, B.J.H.

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InSn seedlayers for Co/Pd multilayered media were engineered using dopants (Pd, O) to achieve grain size of 7.8±1.8 nm (σ=23%) and virgin magnetic cluster size of less than 65 nm. HN=-5 kOe and Hc=12.2 kOe make this media promising for extremely high-density recording. These parameters were all realized with room-temperature depositions without annealing. Media with O-doped 2-nm InSn seedlayers without other adhesion layers achieved Hc=6.2 kOe, which will be beneficial in reducing spacing loss. There is evidence that the engineered seedlayers also reduce the anisotropy dispersion and therefore the switching field distributions of these media.

Published in:

Journal of Applied Physics  (Volume:97 ,  Issue: 10 )

Date of Publication:

May 2005

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