Disk drive using the thermal signal from an MR-head as a radial position sensor

Smith, G.J.; Ottesen, H.H.

doi:10.1109/20.908372

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“…Further work has included recording demonstrations up to 420 Mb in −2 with low bit error rates [178,179] and using improved feed forward schemes to reduce error from repeatable run-out and thus potentially enabling higher track densities [180]. The thermal signal induced in the MR element due to varying head-disk spacing at lands and grooves was also demonstrated as an error signal [181].…”

Section: Patterned Servomentioning

confidence: 99%

Nanofabricated and self-assembled magnetic structures as data storage media

Terris

Thomson

2005

J. Phys. D: Appl. Phys.

794

525

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Nanofabrication of magnetic storage media, where servo marks, discrete tracks or individual islands are defined, offer the prospect for improved performance and increased areal density. However, this increase in performance will require that new and additional processes be introduced into disk manufacturing. We review here the fundamental patterning and fabrication processes that have been proposed, along with their respective strengths and weaknesses and the potential advantages they may offer for magnetic recording. The increase in data density afforded by nanofabrication may have added significance as more conventional approaches to ever increasing density will encounter physical limitations set by the thermal stability of the recorded bits.

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Section: Patterned Servomentioning

confidence: 99%