Reduction of magnetostatic interactions in self-organized arrays of nickel nanowires using atomic layer deposition

Sandrine da Col (1) , Michael Darques (1) , Olivier Fruchart (1) , Laurent Cagnon (1)

1 NEEL - MNM - Micro et NanoMagnétisme

Ordered arrays of magnetic nanowires are commonly synthesized by electrodeposition in nanoporous alumina templates. Due to their dense packing, strong magnetostatic interactions prevent the manipulation of wires individually. Using atomic layer deposition we reduce the diameter of the pores prior to electrodeposition. This reduces magnetostatic interactions, yielding fully remanent hysteresis loops. This is a first step towards the use of such arrays for magnetic racetrack memories.

Mots clés: nanomagnetics; nanoporous materials; nanowires; nickel; Magnetization curves hysteresis Barkhausen and related effects; Electrodeposition electroplating; Fine-particle systems; nanocrystalline materials; Chemical vapor deposition; alumina; arrays; electrodeposition; magnetic hysteresis; magnetic storage; magnetostatics; nanoporous alumina membrane; atomic layer deposition; magnetostatic interactions; magnetic nanowire array; nanofabrication

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Sandrine da Col, Michael Darques, Olivier Fruchart, Laurent Cagnon. Reduction of magnetostatic interactions in self-organized arrays of nickel nanowires using atomic layer deposition. Applied Physics Letters, 2011, 98, pp.112501. ⟨10.1063/1.3562963⟩. ⟨hal-00553589v2⟩