Binary Ferromagnetic Nanostructures: Fabrication, Static and Dynamic Properties

The fabrication of large area binary magnetic nanostructures made from one or two ferromagnetic materials (Ni and Ni80Fe20) is reported using self‐aligned shadow deposition technique. The static and dynamic properties are characterized using magneto‐optical Kerr effects (MOKE) and broadband ferromagnetic resonance spectroscopy. Compared with Ni80Fe20 nanomagnets made using a conventional lithographic technique from identical resist templates, tunable magnetization switching is observed with a marked increase in the coercive field and more adjustable dynamic response for the Ni80Fe20/Ni80Fe20 and Ni/Ni80Fe20 binary structures. The results are validated by direct domain imaging using magnetic force microscopy and micromagnetic simulations. The fabrication of large area binary magnetic nanostructures made from one or two ferromagnetic materials (Ni and Ni80Fe20) is reported using a self‐aligned shadow deposition technique. Tunable magnetization switching and an adjustable dynamic response is observed for the binary structures. The results are validated by direct domain imaging using magnetic force microscopy and micromagnetic simulations.