Edge separation using diffraction anomalous fine structure

We exploit the crystallographic sensitivity of the Diffraction Anomalous Fi ne-Structure (DAFS) measurement to separate the fine structure contribution s of different atomic species with closely spaced resonant energies. In BaT iO3 the Ti K edge and Ba Lm edges are separated by 281 eV, or about 8.2 Ang strom(-1), thus severely limiting the information content of the Ti K edge signal. Using the site selectivity of DAFS we can separate the two fine str ucture spectra using an iterative Kramers-Kronig method, thus extending the range of the Ti K edge spectrum. This technique has application to many ra re earth/transition metal compounds, including many magnetic materials of t echnological significance for which K and L edges overlap in energy.