Self-assembly Routes towards Creating Superconducting and Magnetic Arrays

Zhukov, A. A.; Filby, E.T.; Goncharov, Alexander V.; Ghanem, Mohamed A.; Bartlett, Philip N.; Boardman, Richard; Fangohr, Hans; Metlushko, V.; Novosad, V.; Karapetrov, G.; Groot, P.A.J. de

doi:10.1007/s10909-005-3936-x

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“…This is by using "natural lithography" based on self-organization of polystyrene nanospheres on a hydrophilic surface. The self-assembled close-packed monolayer of spheres can be used as a template for lithographic procedures, including subsequent evaporation or electrodeposition of magnetic materials forming structured elements at the places of the nanospheres [4], [5]. These methods are however still limited in the size of the periodic domains (typically mm ) which restricts application of characterization techniques requiring larger magnetic volume, if periodic properties are under focus.…”

Section: Introductionmentioning

confidence: 99%

Ferromagnetic Resonance Investigation of Macroscopic Arrays of Magnetic Nanoelements Fabricated Using Polysterene Nanosphere Lithographic Mask Technique

et al. 2008

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A dense plane periodical array of cylindrical magnetic nanodots has been fabricated using a lithographic mask formed by self-organization of polystyrene nanospheres. In this paper, we study collective static and dynamic magnetic behavior of this array. We find that this technique produces samples with reasonably small dispersion of magnetic parameters of individual dots. This is evidenced by magnetometry and well-resolved discrete frequencies of standing spin waves measured with cavity and coplanar-waveguide ferromagnetic resonance. The standing spin wave resonances could be reliably observed in a large range of frequencies (4-15 GHz). However the measured linewidth of resonances is about ten times larger than for unpatterned Permalloy. This may be due to some variation in shape and magnetic parameters from dot to dot resulting in inhomogeneous broadening of the resonance lines.

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Section: Introductionmentioning

confidence: 99%