Abstract
Discrete track magnetic recording media with a 60 nm track pitch and prewritten servopatterns were fabricated and tested for read/write performance, and a feasibilityanalysis of the embedded servo was performed. The fabrication process consisted ofultraviolet nanoimprint lithography (UV-NIL) and sequential ion beam etching ona conventional perpendicular magnetic recording medium. Magnetic patternswere written to the fabricated tracks at 700 kilo flux changes per inch (kFCI)using a spin stand and were read using magnetic force microscopy (MFM), witha resulting signal-to-noise ratio (SNR) of 12.15 dB. The servo pattern was alsovisualized with MFM. These results demonstrated the feasibility of writing to a30 nm wide discrete data track and the workability of the embedded servo pattern.
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