Abstract
The synthesis of nanoscale arrays of magnetic particles, which may be used in magnetic recording devices, has attracted considerable interest recently. The coral-flake Co particles were electrodeposited into the pores of the porous NiAl matrix. Compared with the nonanodized samples, the anodized samples in H3PO4 solution formed thicker Al2O3 during the production of ordered Co particle arrays into the porous NiAl matrix. The deposition at a negative potential resulted in increased imax and decreased tmax. The diameter of Co particles increased with increasing deposition time. The interspace of Co was consistent with the interspace of pores distributed in the NiAl matrix. The coercivity (Hc) and the ratio of remanent magnetization to saturation magnetization (Mr/Ms) decreased with increased growth rate of the porous NiAl matrix at the same deposition time. Hc and Mr/Ms also decreased with the prolonged deposition time due to increasing Co size.
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