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We developed a new component level thermal decay test that directly measures decays in media signal and noise, which are combined to obtain signal-to-noise ratio (SNR) decay. The SNR decay on spin stand is in good agreement with the hard disk drive bit error rate decay data. The effect of recording linear density (KFCI) on the SNR decay is studied, which is mainly attributed to the demagnetization field change with the recording density. Applying this test to a group of media with a broad range of nucleation field (Hn), it is found that the SNR decay correlates better with the Hn than with the thermal stability factor
Published in:
Journal of Applied Physics
(Volume:105
,
Issue:
7
)
Date of Publication: Apr 2009
- Page(s):
- 07B720 - 07B720-3
- ISSN :
- 0021-8979
- Digital Object Identifier :
- 10.1063/1.3073658
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 24 June 2009
- Issue Date :
- Apr 2009
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