Perpendicular magnetic anisotropic characteristics of amorphous (CoSIB/Pt)(N) multilayers

E.H.M. van der Heijden, K.J. Lee, Y.H. Choi, T.W. Kim, H.J.M. Swagten, C.Y You, M.H. Jung

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The perpendicular magnetic anisotropic properties of amorphous multilayers of [CoSiB/Pt]N are investigated as functions of the thickness of magnetic layers (tCoSiB¿=¿4 and 6¿Å) and the number of repeated bilayers (N¿=¿3¿~¿20). Even though the magnetization reversal process is dominated by the wall motion of magnetic domains rather than the nucleation for all the values of tCoSiB and N in our experiment, the changes of magnetic properties are strongly dependent on the tCoSiB and N values. The effective anisotropy constant for the 6¿Å sample is K 1 eff¿=¿1.2¿×¿106¿erg/cm3, which is a factor of 6 larger than that for the 4¿Å sample. The coercivity variations as a function of N are explained by the Ruderman-Kittel-Kasuya-Yosida (RKKY) coupling between the magnetic layers considering the balance of domain wall energy and magnetostatic energy.
Original languageEnglish
Pages (from-to)102410-1/6
JournalApplied Physics Letters
Publication statusPublished - 2013


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