Fabrication of Spin-Transfer Nano-Oscillator by Colloidal Lithography

Figure 2

(a) Scanning electron microscopy (SEM) image of polystyrene nanospheres on wafer. (b) SEM image for MTJ nanopillar with nanosphere after Argon ion etching, (c) SEM image of nanopillar after removing nanosphere and SiO₂, and (d) optical image of the final STO device.

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