[Zurück]

K. Rumpf, P. Granitzer, P. Poelt, H. Michor:
"Template morphology dependent control of magnetic interactions between magnetic nanostructures";
Poster: ICM 2015, 20th International Conference onMagnetism, Barcelona, Spain; 05.07.2015 - 10.07.2015.

This presentation discusses the fabrication of self‐organized three‐dimensional arrays of magnetic nanostructures with controllable magnetic properties. The magnetic structures are deposited electrochemically within a porous silicon matrix. Since the magnetic characteristics of the nanocomposite depend not only on the size, shape and mutual arrangement within the pores but also on the template morphology, the structure of the porous silicon has been modified and a correlation between these parameters has been figured out. The porous silicon templates offer a self‐organized pore‐arrangement with a dendritic pore-growth which cannot be suppressed completely in the investigated mesoporous regime. These porous silicon templates have been filled with diverse ferromagnetic metals and alloys by electrodeposition and the deposition process has been elucidated with respect to the roughness of the pore‐walls and the resulting deposited nanostructures (wires, particles). The texture of the pore‐surface plays a crucial role concerning magnetic coupling between adjacent pores. Furthermore the kind of metal is of importance, whereat for each metal the deposition parameters have to be adjusted individually. The nucleation of the metal deposition starts at surface asperities and the growth of the nanostructures can be influenced by using pulsed electrodeposition and also by the electrolyte. A study of the metal deposition dependent on the morphology and the resulting adjustability of the magnetic properties of the 3‐dimensional nanostructure array will be presented.