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Nonuniform thermal reversal in single-domain patterned media

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5 Author(s)
Dittrich, R. ; Inst. of Solid State Phys., Vienna Univ. of Technol., Wien, Austria ; Schrefl, T. ; Suess, D. ; Scholz, W.
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Patterned media shows great potential for future ultrahigh-density magnetic recording. The thermal stability is determined by the relevant transition states. We apply the nudged elastic band method to calculate energy barriers and thermal reversal modes as a function of the island size and intergrain exchange coupling. Nonuniform reversal modes and transition states are found even in single-domain islands. The resulting energy barriers are significantly lower than those estimated from simplified reversal modes.

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Magnetics, IEEE Transactions on  (Volume:40 ,  Issue: 4 )