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A Comparative Study of Perpendicular Media

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3 Author(s)
Simon Greaves ; RIEC, Tohoku Univ., Sendai ; Yasushi Kanai ; Hiroaki Muraoka

Three types of perpendicular recording media were compared using simulations. Exchange coupled composite (ECC) type media could support minimum track pitches up to 18 nm less than a single layer medium, allowing significantly higher areal recording densities. The recording performance of all media was highly susceptible to grain-to-grain variations of uniaxial anisotropy Ku and, in the case of ECC media, to variations in the interlayer coupling strength. Areal densities of around 500 Gb/in2 should be achievable using current technologies, higher densities require improved manufacturing tolerances

Published in:

IEEE Transactions on Magnetics  (Volume:43 ,  Issue: 6 )