Magnetization Reversal Behaviour of Planar Nanowire Arrays of Fe

Title:Magnetization Reversal Behaviour of Planar Nanowire Arrays of Fe

Volume: 9 Issue: 5

Author(s): S. K. Arora, B. J. O’Dowd, P. Thakur, N. B. Brookes, B. Ballesteros, P. Gambardella and I. V. Shvets

Affiliation:

Keywords: Magnetic nanowires, magnetization reversal, magnetic anisotropy, planar nanowire array, Self-Assembly, Vicinal surfaces.

Abstract: Systematic investigations of magnetization behavior performed on planar arrays of 30 nm wide Fe-nanowires (NW) fabricated on oxidized step-bunched Si (111) templates reveal that the NW arrays exhibit an uniaxial anisotropy dominated by the shape of the wires, that facilitates in retaining the magnetization in-plane with easy axis parallel to the wires. The NWs possess polycrystalline character with bcc-crystal structure, and present an oxidized interface when capped with MgO. From the temperature dependent magnetization studies we find that for thick wires (>4.5 nm) the magnetization reversal is governed by the curling reversal mode. Whereas, for thin wires the reversal is dominated by thermal activation.

Cite this article as:

Arora K. S., O’Dowd J. B., Thakur P., Brookes B. N., Ballesteros B., Gambardella P. and Shvets V. I., Magnetization Reversal Behaviour of Planar Nanowire Arrays of Fe, Current Nanoscience 2013; 9 (5) . https://dx.doi.org/10.2174/15734137113099990069