| | | | NEWS | Magnetic force microscopy of helical states in multilayer nanomagnets
We have used magnetic force microscopy (MFM) to investigate noncollinear helical states in multilayer nanomagnets, consisting of a stack of single domain ferromagnetic disks separated by insulating nonmagnetic spacers. The nanomagnets were fabricated from a Co/ Si3 multilayer thin film structure by electron beam lithography and ion beam etching. The structural parameters Co layer and spacer thicknesses were optimized to obtain a clear spiral signature in the MFM contrast, taking into account the magnetostatic interaction between the layers. MFM contrast corresponding to the helical states with different helicities was observed for the optimized structure with Co layer thicknesses of 16, 11, and 8 nm, and with 3 nm Si spacer thickness. © 2008 American Institute of Physics. More - Download PDF > | 
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| | | DNA in Nanotechnology
There is an avalanche-like increase of reports, where molecules of nucleic acids (DNA and RNA) appear as an object of nanotechnology research and/or as material for nano-sized devices. In many cases
scanning probe microscopy (SPM) is the most powerful and informative research tool. Examinations as well as precise manipulations can be performed this way. What is important when SPM is applied to molecular level experiments? Three facets are illustrated further. More - Download PDF > | | |
