Recording comparison of ECC versus conventional media at equal grain size

Hweerin Sohn, R. H. Victora

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Transition jitter and shape have been studied for soft exchange coupled composite (ECC) media and conventional perpendicular media using micromagnetic simulation. A realistic medium having nonuniform grain size has been employed. Media anisotropies are optimized to reduce the high density jitter for ECC and conventional media. Surprisingly, jitter is slightly decreased at high temperature for both media types. Eye diagrams show that short bit length amplitude is higher for ECC by approximately 10% at room temperature. This indicates that sharper transitions were obtained for ECC media particularly at 300 K where the thermal stability of ECC media presumably aids the write process.

Original languageEnglish (US)
Article number6028182
Pages (from-to)4073-4076
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number10
StatePublished - Oct 2011

Bibliographical note

Funding Information:
The authors thank Bogdan Valcu for numerous valuable discussions. The authors appreciate financial support from Seagate Technology and computing time from the Minnesota Supercomputing Institute.


  • Exchange coupled composite (ECC) media
  • micromagnetic simulation
  • thermal fluctuation
  • transition jitter


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