Coercivity tuning in Co/Pd multilayer based bit patterned media

O. Hellwig, T. Hauet, T. Thomson, E. Dobisz, J. D. Risner-Jamtgaard, D. Yaney, B. D. Terris, E. E. Fullerton

    Research output: Contribution to journalArticlepeer-review


    In order to adjust the reversal field of high anisotropy [Co (2.8 Å) /Pd (9 Å)] 8 bit patterned media (BPM), one may increase the individual Co thickness to change the overall anisotropy or alternatively combine the high anisotropy multilayer with a lower anisotropy material, thus creating a heterogeneous laminated system. In the current study, we find that [Co/Pd] 8-N [Co/Ni] N hard-soft laminated BPM allows tuning the coercivity while maintaining a narrow normalized switching field distribution (σSFD / HC), whereas homogeneous structures with increased individual Co thickness show a more pronounced increase in σSFD / HC. Possible reasons for the different behavior, such as changes in strain and texture, are discussed. © 2009 American Institute of Physics.
    Original languageEnglish
    Article number232505
    JournalApplied Physics Letters
    Issue number23
    Publication statusPublished - 2009


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