Articles you may be interested inEnhancing the platinum atomic layer deposition infiltration depth inside anodic alumina nanoporous membrane J. Vac. Sci. Technol. A 33, 01A148 (2015); 10.1116/1.4904398
Depth-resolved magnetization reversal in nanoporous perpendicular anisotropy multilayersTiltable magnetic anisotropy of self-assembled Fe arrays on nanoporous anodic aluminum oxide has been obtained via oblique evaporation. The rims of the pores, which induce a stacking variation to the stacked atoms, obstructed on the top and shadowed on the inner-wall, aid the formation of isolated arrays with extended "sterns." The sterns, formed perpendicularly on the unshadowed inner-wall inducing out-of-plane shape anisotropy, dominate the magnetic anisotropy via the coupling to the magnetization of the topmost single-domain array. High perpendicular magnetic anisotropy ͑1.38ϫ 10 7 ergs/ cm 3 ͒ is induced by the stern at a nominal thickness of 16 nm via 50°-oblique deposition, and capable of tilting with a decrease in shape anisotropy as a result of the decreased oblique angle and increased nominal thickness. The 45°-tilted magnetic anisotropy with independent magnetization reversal is obtained at an oblique angle of about 27.6°.
The granular hcp Co 3 Pt nano-grains with large perpendicular coercivity (Hc ) of 3800 Oe and high perpendicular squareness (S ) of 0.93 can be achieved by deposited 14 nm thickness of Co 3 Pt magnetic layer onto the Pt underlayer with thickness of 200 nm and annealing at low temperature of 300 C in a vacuum of 1 mTorr. It is found that the oxygen atoms would diffuse into Co 3 Pt layer through inter-grains to isolate Co 3 Pt grains and prevent grain growth that will decrease inter-grains interaction and enhance recording density of the magnetic film. This film revealed its prominent potential to be applied as perpendicular magnetic recording media for ultra highdensity recording.
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