A direct-write method for fabricating magnetic nanostructures, including
hard magnetic nanostructures of barium hexaferrite, BaFe, based on
nanolithographic printing and a sol-gel process. This method utilizes a
conventional atomic force microscope tip, coated with a magnetic material
precursor solution, to generate patterns that can be post-treated at
elevated temperature to generate magnetic features consisting of barium
ferrite in its hexagonal magnetoplumbite (M-type) structure. Features
ranging from several hundred nm down to below 100 nm were generated and
studied using AFM, magnetic force microscopy, and X-ray photoelectron
spectroscopy. The approach offers a new way for patterning functional
inorganic magnetic nanostructures with deliberate control over feature
size and shape, as well as interfeature distance and location.