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Cross-sectional SEM images of two PS layers (upper side: surface, lower side: bottom). (a) The anodization was done at 90 mA/cm2 with no assistance of the magnetic field. (b) The anodization was done at 40 mA/cm2 with a magnetic field of 8 T.
A cross-sectional SEM micrograph of a Ni nano-wire array grown along the nano-pores in PS fabricated under the magnetic field anodization.
Normalized magnetization curves of Ni-filled PS samples prepared without (full line) and with (dotted line) magnetic field. The coercivity increased from 270 Oe to 650 Oe and the squareness (MR/MS) from 0.42 to 0.85 in the case of the magnetic field anodization.
Magnetic anisotropy observed in a Ni-PS composite for the two magnetization directions parallel (full line) and perpendicular (dotted line) to the Ni nanowires. The PS template was prepared by magnetic anodization.
Comparison of magnetic properties (coercivity, squareness) of Ni-wires deposited within magnetic field assisted etched porous silicon, conventionally etched porous silicon, and porous alumina templates with two different pore-diameters.31 The magnetic anisotropy between the two magnetization directions (easy axis, magnetic field parallel to the pores and hard axis, magnetic field perpendicular to the pores) is indicated by the ratio between the according coercivities HC,II and HC,⊥.
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