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Thermal stability of patterned Co/Pd nanodot arrays
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Image of FIG. 1.
FIG. 1.

(Color online) Lower (a) and higher (b) resolution images of patterned [Co(0.3 nm)/Pd(0.7 nm)]11 multilayers. (c) Time-dependent coercive fields for N = 3, 5, 8, and 11. The solid lines are fits to Eq. (1) with the fit parameters given in Table I.

Image of FIG. 2.
FIG. 2.

(Color online) (a) Micromagnetic results for the minimum energy reversal pathway for a 35-nm diameter [Co(0.3 nm)/Pd(0.7 nm)]5 multilayer. Domain images are shown along the path indicating a reversal mode consisting of edge domain nucleation and lateral propagation. The energy is maximum when the domain wall extends across the full diameter of the island. (b) Micromagnetic (black diamonds and red squares) and experimental (green crosses) results for the energy barrier vs. N. The micromagnetic calculations include the minimum energy reversal pathway NEB results assuming the strong coupling limit (black diamonds) and the macrospin result assuming coherent rotation (red squares) including the appropriate shape anisotropy and the minimum energy barrier.

Image of FIG. 3.
FIG. 3.

(Color online) Micromagnetic results for the minimum energy reversal pathway (NEB results) for [Co(0.3 nm)/Pd(0.7 nm)]5 multilayer islands ranging from 5 nm to 40 nm in diameter compared to the macrospin approximation.


Generic image for table
Table I.

Magnetic properties of patterned [Co(0.3 nm)/Pd(0.7 nm)]N multilayers for various N. KUV/kBT and H0 were determined form time dependent coercive fields (Fig. 1(c)) according to Eq. (1). The total and intrinsic SFDs, σtot and σint , respectively, were determined from minor loop analysis.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Thermal stability of patterned Co/Pd nanodot arrays