Understanding Transition and Remanence Noise in HAMR

Yipeng Jiao, Julius Hohlfield, R. H. Victora

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Transition noise and remanence noise are the two most important types of media noise in heat-assisted magnetic recording. We examine two methods (spatial splitting and principal components analysis) to distinguish them: both techniques show similar trends with respect to applied field and grain pitch (GP). It was also found that PW50 can be affected by GP and reader design, but is almost independent of write field and bit length (larger than 50 nm). Interestingly, our simulation shows a linear relationship between jitter and PW50NSRrem, which agrees qualitatively with experimental results.

Original languageEnglish (US)
Article number8405760
JournalIEEE Transactions on Magnetics
Issue number11
StatePublished - Nov 2018

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  • Heat-assisted magnetic recording (HAMR)
  • jitter
  • media noise
  • principal components analysis (PCA)


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