Magnetic properties and crystal structures of self-ordered ferromagnetic nanowires by ac electroforming

K. H. Lee, H. Y. Lee, W. Y. Jeung, W. Y. Lee

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Abstract

We have investigated the magnetic properties and crystal structures of α-Fe and Fe 21Ni 79 nanowire arrays fabricated by ac electroforming into self-ordered nanosized pores in anodic aluminum oxide (AAO). The nanopores were found to have diameters of 5-100 nm and aspect ratios of 300-1000 depending on the anodization conditions. X-ray diffraction patterns provide direct experimental evidence that the α-Fe and Fe 21Ni 79 nanowires have preferred crystallographic orientations, indicating that those were electroformed in the (221) and (220) orientations, respectively. For the α-Fe (Fe 21Ni 79) nanowires, coercivity H c and squareness M r/M s were found to be ∼2.02 (∼1.20) kOe and ∼0.9 (∼0.99), respectively. It is observed that the coercivity in Fe 21Ni 79 nanowires increased up to 1.35 kOe with increasing annealing temperature.

Original languageEnglish
Pages (from-to)8513-8515
Number of pages3
JournalJournal of Applied Physics
Volume91
Issue number10 I
DOIs
Publication statusPublished - 2002 May 15

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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