We report on the preparation of Gadolinium thin films by means of sputter deposition on Silicon Oxide wafers. A series of samples with different buffer layers and various substrate temperatures has been produced. The film on an amorphous Tantalum buffer deposited at 773 K shows the highest increase of magnetization during the phase transition at the Curie temperature. Further detailed analysis of the magnetic properties has been conducted by VSM.

Forming ordered 2D or 3D arrays of colloidal particles on the micro‐ or nanometer scale in a bottom‐up process is a challenging task. In previous works by various groups, hybridization between DNA strands localized on the particle surface is used to create crystalline arrays. However, this method requires an annealing process with a duration of one day or more and usually yields agglomerates of only a few dozen particles. In this work, a method for the rapid formation of highly‐ordered 2D agglomerates of superparamagnetic microparticles (beads) is presented. Dipolar coupling between the beads under the influence of a rotating magnetic field leads to the formation of a dense monolayer. The monolayer is then stabilized through DNA hybridization between DNA strands immobilized on the bead surface and a linker strand in solution. The whole self‐assembly process requires less than an hour and is therefore significantly faster than comparable methods.