Journal
IEEE TRANSACTIONS ON MAGNETICS
Volume 41, Issue 10, Pages 3172-3174Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMAG.2005.855283
Keywords
capping layer; CoPtCrO composite media; perpendicular recording media; signal-to-noise ratio (SNR)
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A systematic investigation of the structural and recording characteristics of CoPtCrO composite media with various Co alloys as well as continuous TbFeCo capping layers has been performed. For the media with a Co-alloy capping layer (M-s similar to 900 emu/cm(3)), the transition jitter remains unaffected and dc noise is greatly reduced. However, for the media with low M-s capping layer or continuously exchange coupled TbFeCo capping layer, transition jitter is increased. Magnetically continuous but structurally discontinuous Co-alloy capping layers grown onto well-isolated Co grains can reduce dc noise, while maintaining low transition noise.
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