DERIVATION OF PARTIAL PAIR DISTRIBUTION-FUNCTIONS FOR AMORPHOUS FETB FROM ELECTRON-SCATTERING DATA-BASED ON A NEW CONCEPT

In this work we present pair distribution functions (PDFs) of amorphous Fe1-xTbx (x = 0.1-0.5) with a high spatial resolution better than 0.02 nm obtained from electron diffraction experiments. The short-range order of FeTb alloys with up to 32 at.% Tb content is described quantitatively as an arrangement of the known crystalline FeTb phases with various concentrations and structures by superposing PDFs of these structures in the range of the first and second coordination shell up to 0.6 nm. Partial FeFe, FeTb and TbTb radial distribution functions (RDPs) are obtained from this model; coordination numbers and neighbour distances are presented and compared to other authors' results.