Single-layer Perpendicular Media Research Articles

High-density recording characterization using a single-layer perpendicular medium and a merged MRa head

We investigated the possibility of realizing the high-density recording by using a single-layer perpendicular medium and a merged MR head. The MR head output signal with the perpendicular medium was 50% larger than that with a longitudinal medium. A maximum D50 value of 100 kFCI was obtained for a medium with an optimum thickness of 300 nm. Media with thickness of over 300 nm had increased media noise, and the output was saturated at 300 nm. We expect to realize highlinear density recording by improving the medium's perpendicular anisotropy.

Recording performance of thin film heads on single-layer perpendicular media

The microstructure grain characteristics of single-layer CoCrTa films for perpendicular recording were correlated with the ability to support high density recording using thin film heads. Substrate temperature was identified as the critical sputtering parameter affecting grain. VSM measurements were found to be an unreliable indicator of read-write performance.