Thermal switching distribution of fept grains through atomistic simulation

Sumei Wang, Michael Mallary, R. H. Victora

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

We have studied through atomistic simulation the switching distribution of FePt grains subject to a declining temperature by evaluating the switching probability at different time delays. It is found that smaller cooling rates and larger field angles, field amplitudes, and damping constants are favorable to more deterministic switching, which can be interpreted as less magnetic recording jitter: the temperature difference during switching of grains is identified as the dominant factor. In particular, the damping-induced lag between spin temperature and lattice temperature has been shown and analyzed. The results are compared with those produced by alternate simulation techniques and the underlying physical mechanisms are discussed.

Original languageEnglish (US)
Article number6971435
JournalIEEE Transactions on Magnetics
Volume50
Issue number11
DOIs
StatePublished - Nov 1 2014

Bibliographical note

Publisher Copyright:
© 2014 IEEE.

Keywords

  • FePt
  • heat assisted magnetic recording (HAMR)
  • switching distribution

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