Numerical optimization of writer and media for bit patterned magnetic recording
نویسندگان
چکیده
منابع مشابه
Signal Processing for Bit-Patterned Media and Heat-Assisted Magnetic Recording Systems with Media Noise
With the advent of the information age, the demand for larger storage capacity is ever increasing. However, the need to continue scaling conventional magnetic recording technologies to higher areal densities has led to physical and engineering limits which are difficult to overcome. New magnetic recording technologies are required. Bit-patterned media recording (BPMR) and heat-assisted magnetic...
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We report on the recording performances and signal-to-noise ratio analyses of perpendicular magnetic bit-patterned media. Two different types of magnetic samples are investigated. They differ by the way that they were patterned (nano-imprint versus e-beam lithography) as well as their magnetic properties (Co/Pt multilayers and CoCrPt alloy are the recording layers). By using a contact read/writ...
متن کاملRepeatable Runout following in Bit Patterned Media Recording
An adaptive feedforward controller design for tracking repeatable runout (RRO) in bit patterned media recording (BMPR) is proposed for single stage hard disk drives (HDD). The technique is based on modified filtered-x least mean squares (MFXLMS) algorithm with deterministic periodic input, and a novel variable step size that boosts both the convergence rate and the steady state error. Comprehen...
متن کاملTwo-dimensional Decoding Algorithms and Recording Techniques for Bit Patterned Media Feasibility Demonstrations
Recording experiments and decoding algorithms are presented for evaluating the bit-error-rate of state-of-the-art magnetic bitpatterned media. The recording experiments are performed with a static tester and conventional hard-disk-drive heads. As the reader dimensions are larger than the bit dimensions in both the down-track and the cross-track directions, a two-dimensional bit decoding algorit...
متن کاملTarget and Equalizer Design for High-Density Bit-Patterned Media Recording
In bit-patterned media recording (BPMR) channels, the inter-track interference (ITI) is extremely severe at ultra high areal densities, which significantly degrades the system performance. The partial-response maximum-likelihood (PRML) technique that uses an one-dimensional (1D) partial response target might not be able to cope with this severe ITI, especially in the presence of media noise and...
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ژورنال
عنوان ژورنال: Journal of Applied Physics
سال: 2016
ISSN: 0021-8979,1089-7550
DOI: 10.1063/1.4954888