Results 231 to 240 of about 18,234,848 (269)
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Prospects for bit patterned media for high-density magnetic recording
Journal of Magnetism and Magnetic Materials, 2009Abstract Prospects for bit patterned media (BPM) of more than 1 Tb/in2 are discussed. Improvement in the pattern drawing for small feature size and high precision is necessary for fabrication process. Deviation in the magnetic properties should be estimated and reduced. The etching damage seems not to be large.
Akira Kikitsu
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Thermal Effects in Heat Assisted Bit Patterned Media Recording
IEEE Transactions on Magnetics, 2009It is a big challenge to achieve recording density of 10 Tb/in2 for magnetic recording. Two promising technologies have been proposed for achieving density beyond 1 Tb/in2: heat assisted magnetic recording and bit patterned media. Owing to limitation of minimum media grain size or requirement of higher writing magnetic field, the densities of both ...
Tow Chong Chong +2 more
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High-Density Bit Patterned Media: Magnetic Design and Recording Performance
IEEE Transactions on Magnetics, 2011 International audienceWe examine the magnetic properties and recording performance of bit patterned exchange coupled composite (ECC) magnetic media at different bit and island aspect ratios.
Olav Hellwig, Elizabeth Dobisz
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A simple recorded-bit patterning scheme for bit-patterned media recording
2013 10th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology, 2013In bit-patterned magnetic recording (BPMR), intersymbol interference (ISI) and inter-track interference (ITI) become a major impairment due to small bit and track pitches. One way to alleviate ISI and ITI is to encode the data sequence before recording.
Autthasith Arrayangkool +3 more
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Recording potential of bit-patterned media
Applied Physics Letters, 2006A comprehensive analysis of the areal density potential of bit-patterned media recording shows that the recording performance is dominated by written-in errors. The statistical fluctuations of the magnetic properties and the locations of the individual bits lead to error probabilities so that some dots are either not recorded at all or cannot be ...
H. J. Richter +10 more
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Optimization of LDPC codes for bit-patterned media recording with media noise
2016 16th International Symposium on Communications and Information Technologies (ISCIT), 2016Challenges in bit-pattered magnetic recording (BPMR) include two-dimensional (2D) inter-symbol interference (ISI) constituted by both one-dimensional ISI and inter-track interference (ITI), and media noise arising from island position jitter (PJ) and island size fluctuations (SF) in both the down-track and cross-track directions.
Lingjun Kong +3 more
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Shingled Magnetic Recording on Bit Patterned Media
IEEE Transactions on Magnetics, 2010Shingled magnetic recording on bit patterned media with areal densities of 2-4 Tbit/in2 is examined. The use of a shingled recording scheme allows wider write poles and dots with higher anisotropy to be used. The down-track and cross-track write margins can be tailored to suit the tolerances of the drive by varying the bit cell aspect ratio.
Simon Greaves +2 more
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Twin iterative detection for bit-patterned media recording systems
2017 IEEE International Magnetics Conference (INTERMAG), 2017Bit-patterned media recording (BPMR) has been developed into a technology for the next generation of hard disc drives, which can push area density beyond 1 Tb/in2 for satisfying the ever increasing demand of storing massive amounts of data. One of the major challenges in BPMR systems is 2-D interference that is regarded as a gist of degrading the ...
Chi Dinh Nguyen, Jaejin Lee
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MFM analysis of recorded bit patterns of perpendicular media
Journal of Magnetism and Magnetic Materials, 2001Abstract Read/write characteristics of a perpendicular double-layered medium with various thicknesses of soft magnetic layer δsoft using a ring head were investigated by analyzing the MFM image of the recorded bit pattern and reproduced waveform. It was found that the recording bits were written by the field of the head gap for the medium with δsoft ...
Mayumi Kitano +9 more
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Study of fractionally-spaced equalizers for bit-patterned media recording
2015 IEEE Magnetics Conference (INTERMAG), 2015Bit-patterned media recording (BPMR) is a promising technology to enhance the areal density (AD) of hard disk drives beyond the limit imposed by the current perpendicular recording technology. Practically, a $T$ -spaced equalizer is employed in a conventional (symbol-rate) BPMR system to shape the overall channel response to a target response ...
S. Koonkarnkhai, P. Kovintavewat
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