منابع مشابه
Recording performances in perpendicular magnetic patterned media
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 کاملMagnetic Layers for Perpendicular Recording Media
Hard disk drives (HDDs) are recently being incorporated into video recorders, car navigation devices, family game machines, etc., as devices (AV-HDDs) to store digital AV (audio-visual) information such as movies and television programs. Because the AV-HDD has the features of large capacity, high speed and low cost, it is suitable for long-time recording, high-speed random access and multi-chan...
متن کاملPerpendicular magnetic recording—Its development and realization—
The principle of conventional magnetic recording is that magnetic fields are applied parallel to the plane of the magnetic medium. As described in this paper, the invention and development of a new method of placing the magnetized information perpendicular to the plane of the magnetic recording medium is presented. The yield in the mass production of high-density hard disk drives (HDDs) for per...
متن کاملImproved Iterative Decoding for Perpendicular Magnetic Recording
An algorithm of improving the performance of iterative decoding on perpendicular magnetic recording is presented. This algorithm follows on the authors’ previous works on the parallel and serial concatenated turbo codes and low-density parity-check codes. The application of this algorithm with signalto-noise ratio mismatch technique shows promising results in the presence of media noise. We als...
متن کاملUnexpected Universality in Disordered Systems and Modeling Perpendicular Recording Media
In this thesis, I study the random-field Ising model (RFIM) in both theoretical and applied perspectives. For theoretical interests, I compare the avalanche behavior in equilibrium and non-equilibrium and find an unexpected universality. The application part focuses on the reliability test of the ∆H(M,∆M) methodology, which has been used to measure microscopic properties of magnetic recording m...
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ژورنال
عنوان ژورنال: Journal of the Magnetics Society of Japan
سال: 1988
ISSN: 0285-0192
DOI: 10.3379/jmsjmag.12.155