Abstract
We report on magnetic properties of well-ordered ultra-high density (1.25×1012/in2) arrays of vertically oriented high-aspect-ratio Co nanorods having a 14 nm diameter. The arrays were fabricated by electrodeposition within the pores of a nanoscale template derived from films of diblock copolymers. We find large coercivity enhancement (Hc≈3 kOe at 5 K and 800 Oe at 300 K) relative to a continuous Co film of comparable thickness. The high coercivity in our ordered arrays is contrasted with a distinct decrease of coercivity below ∼50 nm rod diameter in a randomly positioned nanorod assembly.
Original language | English |
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Pages (from-to) | 1553-1554 |
Journal | Journal of Magnetism and Magnetic Materials |
Volume | 226-230 |
DOIs | |
Publication status | Published - 1 May 2001 |
Externally published | Yes |