Shape induced anisotropy in hybrid anti-dot arrays from guided self-assembly templates

Ordered templates are used for electro-deposition of different magnetic materials. This technique offers new opportunities, which are not easily realized by standard lithographic methods, and which allows creation of magnetic nanostructures with 3D architectures on broad range of length scale. To address limitations of self-assembly, hybrid techniques using well established Si technology to guide and confine self-assembly templates is employed. Magnetic measurements are performed using superconducting quantum interference device (SQUID), a vibrating sample magnetometer and a magneto-optical Kerr effect rig. Electrical properties are studied using a four-point probe configuration. Magnetic structures have been imaged using magnetic force microscopy (MFM). Obtained results are analysed using micromagnetic simulations and simple analytical models of domain wall pinning and magnetization curling behavior.