Fabrication of nonepitaxially grown double-layered FePt:C/FeCoNi thin films for perpendicular recording

Yan, M. L.; Li, X. Z.; Gao, L.; Liou, S. H.; Sellmyer, D. J.; van de Veerdonk, R. J. M.; Wierman, K. W.
October 2003
Applied Physics Letters;10/20/2003, Vol. 83 Issue 16, p3332
Academic Journal
A noneptaxially grown double-layered thin-film medium of nanocompsite FePt:C with a FeCoNi soft underlayer for high-density perpendicular magnetic recording was fabricated and investigated. Square-shaped perpendicular loops with a remanance ratio nearly equal to one and a coercivity as large as 8.5 kOe were obtained for this ordered FePt:C double-layered medium. The formation of the ordered L1[sub 0] phase is confirmed by electron diffraction experiments. Transmission electron microscope observations reveal that FePt grains with a uniform size less than 5 nm are embedded in the C matrix and appear to be well isolated. Our results show that nonepitaxially grown (001) textured double-layered nanocomposite L1[sub 0] FePt-based films with perpendicular anisotropy are a promising candidate to realize extremely high-density perpendicular recording. © 2003 American Institute of Physics.


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