Imaging the Fine Structure of a Magnetic Domain Wall in a Ni Nanocylinder

Nicolas Biziere (1) , Christophe Gatel (1) , Rémy Lassalle-Balier (2) , Marie-Claude Clochard (3) , J.-E. Wegrowe (3) , Etienne Snoeck (1)

1 CEMES - Centre d'élaboration de matériaux et d'études structurales
2 School of Physics and CRANN
3 LSI - Laboratoire des Solides Irradiés - Irradiated Solids Laboratory

We present the first experimental imaging of the internal DW structure in 55 and 85 nm diameter Ni nanocylinders, using electron holography combined with micromagnetic calculations. We demonstrate the magnetic transition from a hybrid magnetic state with both vortex and transverse DW in 85 nm diameter Ni nanocylinders to a pure transverse wall in thinner nanowires. This is particularly important as DWs in nanocylinders are model systems to go beyond the classical Walker limit.

Mots clés: 3D nanomagnetism; magnetic transition; nanocylinder; electron holography; Magnetic domain wall; 3D nanomagnetism

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

Nicolas Biziere, Christophe Gatel, Rémy Lassalle-Balier, Marie-Claude Clochard, J.-E. Wegrowe, et al.. Imaging the Fine Structure of a Magnetic Domain Wall in a Ni Nanocylinder. Nano Letters, 2013, 13 (5), pp.2053-2057. ⟨10.1021/nl400317j⟩. ⟨hal-01143150⟩