%0 journal article %@ 0947-8396 %A Eidenberger, E., Stergar, E., Leitner, H., Staron, P., Spitaler, J., Ambrosch-Draxl, C., Clemens, H. %D 2009 %J Applied Physics A %N 2 %P 331-340 %R doi:10.1007/s00339-009-5332-x %T Combined use of small-angle neutron scattering and atom probe tomography for the analysis of precipitatesin a Fe-15 m%Co-25 m%Mo alloy %U https://doi.org/10.1007/s00339-009-5332-x 2 %X Atom probe tomography (APT) measurements were conducted to analyze nm-sized precipitates in a Fe-25 m% Co-15 m% Mo model alloy. Calculation of isoconcentration surfaces and application of cluster-search algorithms yielded the chemical compositions of matrix and precipitates. Small-angle neutron scattering (SANS) was performed in order to calculate the ratio of magnetic to nuclear scattering. This so-called A-ratio was compared with values calculated from the chemical information derived from the atom probe data. For this, the magnetism of the precipitates has to be taken into account. Ab-initio studies have been carried out to determine the magnetic moment of the precipitate phase. The results show that the extremely fine precipitates are ferromagnetic and exhibit near-equilibrium composition. In the very early stage of decomposition, however, the composition is different from near-equilibrium. The influences of the magnetism of the precipitates as well as of artifacts from atom probe measurements on the obtained results are discussed.