Flux-closure domains in high aspect ratio electroless-deposited CoNiB nanotubes

Abstract

We report the imaging of magnetic domains in ferromagnetic CoNiB nanotubes with very long aspect ratio, fabricated by electroless plating. While axial magnetization is expected for long tubes made of soft magnetic materials, we evidence series of azimuthal domains. We tentatively explain these by the interplay of anisotropic strain and/or grain size, with magneto-elasticity and/or anisotropic interfacial magnetic anisotropy. This material could be interesting for dense data storage, as well as curvature-induced magnetic phenomena such as the non-reciprocity of spin-wave propagation.

arXiv commentFocus only on azimuthal domains, information on domain walls (part of v1) removed - title, abstract and discussion changed accordingly, tubular racetracks scheme removed; new references, figures. Submission to SciPost (reformatted, new abstract, DOI added to references). Enhanced discussion of anisotropy, disagreement of synchrotron data and magnetometry rectified, new MOKE data added

References in corpus (5)

• Current-driven dynamics of chiral ferromagnetic domain walls
• Interfacial Dzyaloshinskii-Moriya interaction in perpendicularly-magnetized Pt/Co/AlO${}_x$ ultrathin films measured by Brillouin light spectroscopy
• Imaging magnetic vortex configurations in ferromagnetic nanotubes
• Quantitative analysis of shadow X-ray Magnetic Circular Dichroism Photo-Emission Electron Microscopy
• Magnetic properties of a long, thin-walled ferromagnetic nanotube

Cited by in corpus (6)

• Magnetic nanowires and nanotubes
• Imaging three-dimensional magnetic systems with X-rays
• Non-reciprocity of spin waves in magnetic nanotubes with helical equilibrium magnetization
• Curvature effects on phase transitions in chiral magnets
• Theoretical study of current-induced domain wall motion in magnetic nanotubes with azimuthal domains, including Œrsted field and spin-transfer torques
• Spin-orbit torque driven motion of chiral domain walls induced by radial magnetization in nanotube geometry