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Thickness-dependent magnetization reversal behavior of lithographic IrMn/Fe ring structures
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) (a) Schematic structure of the multilayer EB IrMn/Fe ring arrays. (b) Schematic structure of the multilayer unbiased Fe ring arrays. (c) Scanning electron microscopic images of the sample. A detailed image of one ring is shown on the bottom right corner.

Image of FIG. 2.
FIG. 2.

(Color online) M-H hysteresis loops of unbiased Fe ring arrays with Fe layer thickness equals to (a) 10 nm, (b) 30 nm, and (c) 50 nm. The first order derivative dM/dH of the loop’s descending branch is plotted in the inset box located at the right bottom corner of each loop. Hysteresis loops of exchange biased IrMn/Fe rings with t Fe equals to (d) 10 nm, (e) 50 nm, and (c) 80 nm are shown in the second row.

Image of FIG. 3.
FIG. 3.

(Color online) (a) Experimental exchange biased field (symbols) as a function of the field orientation θ and the numerical fitting (continuous line). (b) The anisotropy fields H eb and H U obtained from the fitting for the angular dependence of H eb for EB IrMn/Fe rings with different t Fe.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Thickness-dependent magnetization reversal behavior of lithographic IrMn/Fe ring structures