| Presentation | 2002/10/31 Transition density dependence of noise for double-layered perpendicular magnetic recording media Takashi KOMAKINE, Naoki HONDA, Kazuhiro OUCHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Integrated noise power for double-layered perpendicular magnetic recording media was experimentally observed as increasing with the transition density at relatively low densities while saturating at a higher density. First, a noise model with a finite transition width was analyzed assuming the transition jitter was the dominant source of the medium noise. Though the calculated noise power increased with increasing the transition density at relatively low densities, it reduced at higher densities as different from the experimental data due to the decrease in the recorded magnetization by the inter-transition-interference at the bit crowded situation. Decrease in the magnetization level of the medium should result in increase of reversed domains, so that the reversed domain noise increases when the transition density increases. Therefore, the experimental result that the medium noise saturated at higher transition densities could be explained as a summation of the decreased jitter noise and the increased reversed-domain noise giving a constant value. The noise power at the extreme density should represent to the AC-erased noise power. The dependence of the jitter noise properties on the transition density for the bit crowded situation will be discussed both in perpendicular and longitudinal recording. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Perpendicular magnetic recording / Transition noise / Jitter noise / Recording density / Transition jitter |
| Paper # | MR 2002-44 |
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| Conference Information | |
| Committee | MR |
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| Conference Date | 2002/10/31(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Magnetic Recording (MR) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Transition density dependence of noise for double-layered perpendicular magnetic recording media |
| Sub Title (in English) | |
| Keyword(1) | Perpendicular magnetic recording |
| Keyword(2) | Transition noise |
| Keyword(3) | Jitter noise |
| Keyword(4) | Recording density |
| Keyword(5) | Transition jitter |
| 1st Author's Name | Takashi KOMAKINE |
| 1st Author's Affiliation | ALT (Akita Research Institute of Advanced Technology)() |
| 2nd Author's Name | Naoki HONDA |
| 2nd Author's Affiliation | ALT (Akita Research Institute of Advanced Technology) |
| 3rd Author's Name | Kazuhiro OUCHI |
| 3rd Author's Affiliation | ALT (Akita Research Institute of Advanced Technology) |
| Date | 2002/10/31 |
| Paper # | MR 2002-44 |
| Volume (vol) | vol.102 |
| Number (no) | 423 |
| Page | pp.pp.- |
| #Pages | 6 |
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