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Article Dans Une Revue Journal of Applied Physics Année : 2017

Magnetic domain walls in nanostrips of single-crystalline Fe4N thin films with fourfold in-plane magnetic anisotropy

Résumé

We investigated head-to-head domain walls in nanostrips of epitaxial $\mathrm{Fe}_4\mathrm{N}(001)$ thin films, displaying a fourfold magnetic anisotropy. Magnetic force microscopy and micromagnetic simulations show that the domain walls have specific properties, compared to soft magnetic materials. In particular, strips aligned along a hard axis of magnetization are wrapped by partial flux-closure concertina domains below a critical width, while progressively transforming to zigzag walls for wider strips. Transverse walls are favored upon initial application of a magnetic field transverse to the strip, while transformation to a vortex walls is favored upon motion under a longitudinal magnetic field. In all cases the magnetization texture of such fourfold anisotropy domain walls exhibits narrow micro-domain walls, which may give rise to peculiar spin-transfer features.

Dates et versions

hal-01233511 , version 1 (25-11-2015)

Identifiants

Citer

Keita Ito, Nicolas Rougemaille, Stefania Pizzini, Syuta Honda, Norio Ota, et al.. Magnetic domain walls in nanostrips of single-crystalline Fe4N thin films with fourfold in-plane magnetic anisotropy. Journal of Applied Physics, 2017, 121 (24), pp.243904. ⟨10.1063/1.4989991⟩. ⟨hal-01233511⟩
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