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Nanomagnets by Self Organisation

Objective

This project aims at developing a technology for the production of highly ordered patterns of nano-magnets, based on self-organized processes. The dimensions of the individual magnetic dot structures in the nanometer regime promise ultrahigh densities of single domain magnets usable for magnetic ultra-high density storage.

Two promising self-organized fabrication approaches of ordered nano-magnet arrays are developed in this project. The first approach uses a multi-layered structure, consisting of a thin (<5nm) magnetic layer, embedded between two GaSb-semiconductor layers. The top GaSb layer is eroded in a normal incidence ion sputtering process, producing a hexagonally ordered dot pattern. As the ion erosion process proceeds into the metal layer a hexagonal ordered metallic nano-pattern emerges with dimensions in the range of 15 to 100nm.

The second approach based on SiGe substrates, which are covered by a checkerboard-like pattern of pyramids, formed during controlled growth of SiGe-alloys. Deposition of magnetic material under normal or grazing incidence results in a formation of a pattern of magnetic islands.

The size of the individual pyramidal structures can be varied in the lower nanometer range. In addition to the process know-how for the fabrication of these magnetic nanodots, a large body of nano-analytic investigation will be performed, concerning magnetic behavior, structure and composition of the dots, accompanied by the development and tribological characterization of protective coatings.

Call for proposal

FP6-2002-NMP-1
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Funding Scheme

STREP - Specific Targeted Research Project

Coordinator

RHEINISCH-WESTFAELISCHE TECHNISCHE HOCHSCHULE AACHEN
Address
Templergraben 55
Aachen
Germany

Participants (3)

MONTAN UNIVERSITAET LEOBEN
Austria
Address
Franz Josef Strasse 18
Leoben
UNIVERSIDAD AUTONOMA DE MADRID
Spain
Address
Campus De Cantoblanco
Madrid
UPPSALA UNIVERSITET
Sweden
Address
St Olofsgatan, 10B
Uppsala