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Composite perpendicular magnetic recording media using [Co/PdSi]n as a hard layer and FeSiO as a soft layer

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5 Author(s)
Shen, W.K. ; The Center for Micromagnetics and Information Technologies (MINT) and Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, Minnesota 55455 ; Bai, J.M. ; Victora, R.H. ; Judy, J.H.
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We fabricated the composite perpendicular magnetic recording (PMR) media successfully for the first time by combining a nanogranular FeSiO soft layer and a [Co/PdSi]n hard layer. PdSi spacing layer (0–4 nm) was used to study the exchange coupling effects between the FeSiO(5 nm) and the [Co(0.26 nm)/Pd(1 nm)]14 layers in the composite films. Proper coupling occurs when PdSi interlayer is ∼0.5 nm. Significant lowering of the coercivity is observed for the composite PMR medium while still maintaining good thermal stability. The results prove the possibility to fabricate a writable PMR medium having an ultrahigh magnetic anisotropy constant Ku value.

Published in:

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