Three-dimensional magnetic flux-closure patterns in mesoscopic Fe islands

Abstract

We have investigated three-dimensional magnetization structures in numerous mesoscopic Fe/Mo(110) islands by means of x-ray magnetic circular dichroism combined with photoemission electron microscopy (XMCD-PEEM). The particles are epitaxial islands with an elongated hexagonal shape with length of up to 2.5 micrometer and thickness of up to 250 nm. The XMCD-PEEM studies reveal asymmetric magnetization distributions at the surface of these particles. Micromagnetic simulations are in excellent agreement with the observed magnetic structures and provide information on the internal structure of the magnetization which is not accessible in the experiment. It is shown that the magnetization is influenced mostly by the particle size and thickness rather than by the details of its shape. Hence, these hexagonal samples can be regarded as model systems for the study of the magnetization in thick, mesoscopic ferromagnets.

12 pages, 11 figures

References in corpus (4)

• Geometrically constrained magnetic wall
• Equilibrium nano-shape changes induced by epitaxial stress (generalised Wulf-Kaishew theorem)
• Magnetic domain walls in constrained geometries
• Angular-dependence of magnetization switching for a multi-domain dot: experiment and simulation

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