Periodic magnetic nanostructures on self-assembled surfaces by ion beam bombardment

Abstract

We demonstrate that periodic magnetic nanostructures can be fabricated by depositing perpendicular magnetic films on self-assembled surfaces by ion beam bombardment. Similar stripe domain patterns and reduced coercivity are observed for the as-deposited sample as compared with those for a reference sample with unbombarded substrate. Further processing steps such as etching and polishing will be needed to isolate the magnetic elements from each other, in order to make ultrahigh density magnetic storage media.

Hydrogen adsorption promoted perpendicular magnetic anisotropy in nano-structured Fe coverage on Pd/W{112} faceting surface

“…Magnetic materials deposited on a nanoscale self-organized template usually bring about many interesting magnetic properties, and provide the possibility of modulating magnetic behavior in nanomaterials. 3,4 In contrast to the general 2-dimensional nano-templates, the 3-sided pyramids formed in the reconstruction of W(111), named faceting surface, provide another 3-dimensional nano-template for magnetic materials. Previous studies show that Pd can be used to induce the faceting of W(111) and the size of 3-sided pyramids ranges from several to tens of nanometers, depending on the annealing process.…”

Magnetic multilayers on nanospheres

“…Although fl at substrates are commonly used, we report on the advantages of using curved surfaces as a substrate. Th e curvature induces a lateral fi lm-thickness variation that allows alteration of the properties of the deposited material 2,3 . Based on this concept, a variety of implementations in materials science can be expected.…”

Arrays of magnetic nanoindentations with perpendicular anisotropy

“…17,18 Unfortunately, most methods may not be suitable for largescale device fabrication because they are multistep, expensive, and involve time-consuming procedures. Alternative ways to produce a template for patterning are self-assembly techniques such as anodized alumina, 19,20 phase separation in block copolymers, [21][22][23] surface instability induced by ion bombardment, 24,25 or self-assembled particles. [26][27][28] These templates can be used as an etch mask or a deposition mask.…”