[en] The focus of the project was to use ion implantation of Fe into suitable host matrices to achieve the formation of assemblies with magnetic order. In the main part of the project mass separated ⁵⁷Fe ions were implanted to fluences of 1 x 10¹⁵, 1 x 10¹⁶ and 2 x 10¹⁶ cm², into a range of substrates which included ZnO, 3CSiC, CVD diamond, SiO₂, Si and graphite. The search for cluster formation was conducted as functions of thermal treatment of the substrates and implantation dose. Characterization methods included Moessbauer spectroscopy, Rutherford Backscattering spectrometry, and MOKE and VSM measurements. The Moessbauer spectra of the Fe implanted ZnO and SiC single crystals, annealed up to 1073K and 973K, respectively, show that the Fe³⁺ ions remain fairly constant in the crystals, while the Fe²⁺ show some reordering. However, no clear evidence of magnetic clustering was obtained. Complementary investigations were also conducted with the Moessbauer Spectroscopy group at CERN on Moessbauer studies on magnetic complexes formed in ZnO (as well as other oxides) following ion implantation of extremely low fluences of ⁵⁷Mn. The ZnO spectra, in addition to the expected doublet structure due to Fe at substitutional and interstitial sites, displayed magnetic structures that have been analysed in terms a sharp sextet, two paramagnetic doublets, and two ferromagnetic magnetic distribution. The magnetic effects disappear above 600K. The formation of the magnetic ordering is proposed to occur on an atomic scale upon the association of complexes of Mn/Fe probe atoms with the Zn vacancies that are created in the implantation process, and conversely, disappearance sets in above 600K due to thermally activated annealing of the vacancies. (author)