High Track Pitch Density for HAMR Recording: 1M TPI
| Autor: | Victor Boris Sapozhnikov, Peter Czoschke, Chris Rea, Michael Allen Seigler, Jan-Ulich Thiele, Pavol Krivosik, Steven Granz, Ganping Ju, Yingguo Peng, Jianxin Zhu |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Physics business.industry Reading (computer) Track (disk drive) 01 natural sciences Signal Electronic Optical and Magnetic Materials Transducer Optics Heat-assisted magnetic recording Interference (communication) 0103 physical sciences Perpendicular Electrical and Electronic Engineering Pitch tracking business |
| Zdroj: | IEEE Transactions on Magnetics. 55:1-8 |
| ISSN: | 1941-0069 0018-9464 |
| DOI: | 10.1109/tmag.2018.2867153 |
| Popis: | Differences between heat-assisted magnetic recording (HAMR) and conventional perpendicular magnetic recording at narrow track widths are compared. We can see that HAMR appears to have similar adjacent track interference, but increased readback signal from the adjacent tracks (side reading). This background interference signal appears to be a consequence of the media architecture, and can be decreased if the media soft underlayer spacing to the hard layer, and transducer is reduced. The impact is also reduced for very high linear densities, due to a smaller fraction of unbiased flux from the neighbor tracks reaching the test track. The use of two reader multiple sensor magnetic recording at high track density appears to address some of this issue, and we can demonstrate viable track writing for HAMR beyond 1M tracks per inch using this readback technique. |
| Databáze: | OpenAIRE |
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